Dotnet differences compiled -1

ADO.NET Difference FAQs-1
1. What are the differences between DataReader and DataAdapter?

S.No DataReader DataAdapter

1 Works in Connected Mode Works in Disconnected Mode

2 Can have only one record at a Can have more than 1 records
time

3 Is ForwardOnly and Readonly Can navigate front and back and
editable

4 Faster Slower
2. What are the differences between DataSet and DataReader?

S.No DataSet DataReader

1 The data store whose records You can read data from datareader
have to be manipulated can be only if the connection to data store
disconnected. exists.

2 You have the provision to cache Caching of data is not possible.
data fetched from data store
when using dataset.

3 Dataset objects have XML XML Support is not provided by
Support. datareader.

4 A single dataset object can Datareader can read records
contain collection of datatable fetched by a command object
objects wherein each datatable containing a single query. If you
object refers to a table in the have to fetch data from multiple
datastore. Hence you can tables, then datareader is not
manipulate on multiple tables advantageous when compared to
using a dataset. dataset.

5 Using dataset, you can read the While reading records, you can
records fetched in any order. iterate only in forward direction.

6 Performance wise, dataset is Datareader gives high performance
slow because it has multiple and records can be fetched faster
tables which in turn include when compared to dataset.
multiple rows, columns and
constraints.
3. What is the difference between DataSet.Copy() and DataSet.Clone()?

S.No DataSet.Copy() DataSet.Clone()

1 DataSet.Copy() copies both the DataSet.Clone() copies the
structure and data structure of the DataSet, including
all DataTable schemas, relations,

and constraints and it does not copy
any data
4. What are the differences between RecordSet and DataSet?

S.No RecordSet DataSet

1 RecordSet provides data of one DataSet is a data structure which
row at an instant represents the complete table data
at the same time

2 RecordSet always needs an DataSet needs connection only for
Open connection to read the retrieving the data. After retrieve the
data from data sources data connection is not necessary

3 RecordSet is able to load the DataSet has the capability to store
structure and data of only one the structure and data of multiple
table at a time tables at a time

4 RecordSet does not support DataSet enforces data integrity by
constraints of Databases using Constraints
5. What are the differences between ADO and ADO.Net?

S.No ADO ADO.Net

1 It is a COM based library. It is a CLR based library.

2 Classic ADO requires active ADO.NET architecture works while the
connection with the data store. data store is disconnected.

3 Locking feature is available. Locking feature is not available.

4 Data is stored in binary format. Data is stored in XML.

5 XML integration is not possible. XML integration is possible.

6 It uses the object named It uses Dataset Object for data access
Recordset to reference data from and representation.
the data store.

7 Using Classic ADO, you can Dataset object of ADO.NET includes
obtain information from one table collection of DataTables wherein each
or set of tables through join. You DataTable will contain records fetched
cannot fetch records from multiple from a particular table. Hence multiple
tables independently. table records are maintained
independently.

8 Firewall might prevent execution ADO.NET has firewall proof and its
of Classic ADO. execution will never be interrupted.

9 Classic ADO architecture includes ADO.NET architecture doesn't include
client side cursor and server side such cursors.
cursor.

10 You cannot send multiple You can send multiple transactions
transactions using a single using a single connection instance.
connection instance.

Reference: http://onlydifferencefaqs.blogspot.in/2012/07/adonet-difference-faqs-1.html

ADO.Net Difference FAQs-2
1.Difference between Typed DataSet and Untyped DataSet

S.No Typed DataSet Untyped DataSet

1 It provides additional methods, It is not as easy to use as strongly
properties and events and thus typed dataset.
it makes it easier to use.

2 They have .xsd file (Xml They do not do error checking at
Schema definition) file the design time as they are filled at
associated with them and do run time when the code executes.
error checking regarding their
schema at design time using
the .xsd definitions.

3 We will get advantage of We cannot get an advantage of
intelliSense in VS. NET. intelliSense.

4 Performance is slower in case Performance is faster in case of
of strongly typed dataset. Untyped dataset.

5 In complex environment, Untyped datasets are easy to
strongly typed dataset's are administer.
difficult to administer.

Typed DataSets use explicit names and DataTypes for their members.
ex:
northwindDataSet.Products.ProductNameColumn.Caption = "pnames";

UnTyped DataSets use table and column collections for their members
ex:
ds.Tables["emp"].Columns["eno"].ReadOnly=true;

2.Difference between DataView and DataTable

S.No DataView DataTable

1 Read-only i.e., DataView can Read/Write i.e., Datatable can be
be used to select the data. used to edit or select or delete or
insert a data.

2 Is a reference to an existing Can be created empty and then
DataTable. Cannot be populated
populated from scratch; must
be instantiated with a
reference to an existing
DataTable.

3 Data is a reference to an Data takes storage space.
existing DataTable, and does
not consume space.

4 Can sort or filter rows without Can add/edit/delete rows, columns,
modifying the underlying data. and data, and all changes are
Rows and columns can be persistent.
hidden and revealed
repeatedly.

5 Can return a DataTable version Can be cloned
of the view

6 A live reference to a Is source data; does not contain
DataTable; any changes in the references
DataTable data is immediately
reflected in the view.

7 Supports calculated columns, Does not support calculated
which are columns with a value columns
calculated on the fly by
combining or manipulating
other columns.

8 Can hide or show selected No row or column hiding
columns

3.Difference between Connected and Disconnected Environment

S.No Connected Environment Disconnected Environment

1 Connected Environment needs Disconnected Environment does
a constantly connection of user not need any connection.
to data source while
performing any operation.

2 Only one operation can be Multiple operations can be
performed at a time in performed.
connection Environment.

3 DataReader is used in DataSet is used in it.
Connection Environment.

4 It is slower in speed. Disconnected Environment has a
good speed.

5 We get updated data in it. There is a problem of dirty read.


ADO.NET Difference FAQs-3
1.Difference between ExecuteNonQuery() and ExecuteScalar() methods in ADO.NET

S.No ExecuteNonQuery() ExecuteScalar()

1 It will work with Action Queries It will work with Non-Action Queries
only that contain aggregate functions.
(Create,Alter,Drop,Insert,Updat
e,Delete).

2 It returns the count of rows It returns the first row and first
effected by the Query. column value of the query result.

3 Return type is int Return type is object.

4 Return value is optional and Return value is compulsory and
can be assigned to an integer should be assigned to a variable of
variable. required type.

Example-1 for ExecuteNonQuery Method -Insert:

SqlCommand cmd = new SqlCommand("Insert Into SampleTable Values('1','2')",con);
//con is the connection object

con.Open();
cmd.ExecuteNonQuery(); //The SQL Insert Statement gets executed

Example-2 for ExecuteNonQuery Method - Update:

public void UpdateEmployeeEmail()
{
SqlConnection conn = new SqlConnection(connString))
String sqlQuery = "UPDATE Employee SET empemail='umar.ali@xyz.com' WHERE
empid=5;
SqlCommand cmd = new SqlCommand(sqlQuery, conn);
try
{
conn.Open();
cmd.ExecuteNonQuery();
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
finally
{

conn.Close();
}
return count;
}

Example-1 for ExecuteScalar Method:

This returns only one value that is first column value of the first row in the executed query

public int getSomeProdId()
{
int count=0;
String sqlQuery = "SELECT COUNT(*) FROM dbo.region";
try
{
conn.Open();
//Since return type is System.Object, a typecast is must
count = (Int32)cmd.ExecuteScalar();
}
{
}
finally
{
conn.Close();
}
return count;
}

Example-2 for ExecuteScalar Method:

This returns one value only, no recordsets.

cmd.CommandText = "Select Name, DOB, from Emp where ID=1";
Dim strName As string = cmd.ExecuteScalar.ToString

2.Difference between ExecuteNonQuery() and ExecuteReader() methods in
ADO.NET

S.No ExecuteNonQuery() ExecuteReader()

1 It will work with Action Queries It will work with Action and Non-
only Action Queries (Select)
(Create,Alter,Drop,Insert,Updat
e,Delete).

2 It returns the count of rows It returns the collection of rows
effected by the Query. selected by the Query.

3 Return type is int Return type is DataReader.

4 Return value is optional and Return value is compulsory and
can be assigned to an integer should be assigned to an another
variable. object DataReader.

Example-1 for ExecuteNonQuery Method -Insert:

SqlCommand cmd = new SqlCommand("Insert Into SampleTable Values('1','2')",con);
//con is the connection object

con.Open();
cmd.ExecuteNonQuery(); //The SQL Insert Statement gets executed

Example-2 for ExecuteNonQuery Method - Update:

public void UpdateEmployeeEmail()
{
String sqlQuery = "UPDATE Employee SET empemail='umar.ali@xyz.com' WHERE
empid=5;
try
{
conn.Open();
cmd.ExecuteNonQuery();
}
{
}
finally
{
conn.Close();
}
return count;
}

Example for ExecuteReader Method:

Here, ExecuteReader is used to get set of records by specified query, namely, "select *
from emp"

SqlConnection con = new SqlConnection(constr); //constructor can be connection of string.
SqlCommand cmd = new SqlCommand ("select * from emp", con);
con.Open();
SqlDataReader dr = cmd. ExecuteReader (CommandBehavior. CloseConnection);
//Implicitly closes the connection because CommandBehavior. CloseConnection was
specified.

while(dr.Read())
{
Console.WriteLine (dr.GetString(0));
}
dr.Close();


AJAX Difference FAQs-1
1.Difference between AJAX and jQuery

S.No AJAX jQuery

1 AJAX is a powerful tool which JQuery is a light weight language
cannot use HTML since it is a that focuses the interaction in the
simple tool and it can not HTML elements.
reload the page after it is once
loaded.

2 AJAX is a combination of JQuery cannot provide a new
several technologies such as functionality by combining with
CSS, HTML, DOM and many other technologies.
more. In combination with
these technologies, AJAX
provides new functionalities.

3 AJAX should be accessed in a JQuery can be accessed through
proper procedure to retrieve front-end therefore JQuery does
data from the server. not require understanding of the
complete procedure to setup a
page.

4 Heavy usage of AJAX often There is no chance for overload of
leads to the server overload server while using JQuery since
due to more number of there is no such heavy usage in
connections created. JQuery.

2.Difference between AJAX and JavaScript

S.No AJAX JavaScript

1 AJAX allows the coder send JavaScript is a client side scripting
request data asynchronously in language that allows the creation of
order load new data without dynamic web pages by providing a
changing the web page. new level of interactivity.

2 AJAX supports the server side JavaScript provides support to the
scripting Language. client side scripting language.

3 AJAX can load the web page JavaScript cannot load the pages
after it is been loaded for the after it is once loaded.
first time.

4 AJAX does not install Trojan in JavaScript can install Trojan in the
the computer. computer.

3.Difference between AJAX and PHP

S.No AJAX PHP

1 AJAX is an Asynchronous PHP is a Hypertext processor that
JavaScript XML that has a is a general scripting language
group of web technologies which produces dynamic web
which are interrelated. pages.

2 AJAX is not a stand alone PHP is a stand alone technology.
technology. AJAX is a group of
technology.

3 AJAX needs a specific platform PHP can run on any platform and
and operating system to run. operating system.

4 AJAX is difficult to develop on PHP is easy to develop on static
static pages. pages.

5 AJAX will only run if the PHP is highly vulnerable and does
browser supports JavaScript or not require much support.
XMLHttpRequest.

4.Difference between AJAX and DHTML

S.No AJAX DHTML

1 AJAX does not have the DHTML makes a Button glow or
feature of making the button pressed when the cursor is moved
glow when the cursor is moved over it.
over it.

2 AJAX can load a single link DHTML loads a fresh new page to
instead of loading the whole load a link.
new page.

3 AJAX saves the loading time. DHTML consumes more time than
AJAX takes in loading the page.

4 AJAX permits the browser to DHTML does change the element
request certain elements which on the screen depending on the
reduces the strain on the request from the user.
internet.

Reference: http://onlydifferencefaqs.blogspot.in/2012/08/ajax-difference-faqs-1.html

ASP.NET Difference FAQs
1. What are the differences between Inline code and Code Behind Code?

S.No Inline code Code Behind Code

1 Its within .aspx file Its in a external class file

2 Dynamically compiled Compiled prior to deployment and
linked with .aspx file
2. What are the differences between Global.asax and Web.Config?

S.No global.asax web.config

1 It is a class file It is an XML file

2 There can be only one for an There can be many if under different
application sub-folders

3 Can have Application and Cannot have Application and Session
Session events events

4 Need to be recompiled when No need to compile when changes
changes are made are made
3. What are the Differences between Server.Transfer and Response.Redirect?

S.No Server.Transfer Response.Redirect

1 The navigation happens on the The navigation happens on the
server-side ,so client history is client-side ,so client history is
not updated updated

2 Data can be persist across the Context.Items loses the persistence
pages using Context.Item
collection

3 No Round-trips Makes a Round-trip

4 Has Good encapsulation No
4. What is the difference between a custom control and a user control?

S.No User Control Custom Control

1 Is a file with the .ascx extension Is a file with the .dll extension

2 Can be only used with the Can be used in any number of
application applications

3 Language dependent They are language independent, a
control
created in c# can be used in vb.net

4 Cannot be added to Visual studio Can be added to Visual studio Toolbox

Toolbox

5 Inherits from Server controls and We have to develop from scratch ,
easy to create so comparatively
difficult

6 Generally used for static content Used when dynamic content is
required
5. What is the difference between Caching and Application?
S.No Caching Application

1 Cache have expire policy Application does not have expire
policy

2 Cache does not require explicit Application require explicit locking
locking

3 Cache has the Property of Application variables exist as long as
timeout, which allows us to control the application is alive
the duration of the Objects so
cached

4 Output can be cached in 4 ways, Application does not have options as
like Cache object
• Page Output Caching
• Page Partial Caching
• DataSource Caching
• Data Caching

5 It is accessible to page level to all It is accessible to both page level
the users and application level to all the users
6. What is the difference between web farm and web garden?

S.No Web farm Web garden

1 A web application running on A web application running on a single
multiple servers is called a web server that has multiple CPUs is
farm. called a web garden.The benefit of
using this is, if one server crashes
then other will work instantly.

2 For Web Garden, we have to use Web Farm is implemented using
techniques like Net Work Load
in Machine.Config file. Balancing.

Summary:
Web garden and web farms are asp.net applications that serve the purpose when the
user base of a web site increases considerably.

For Web garden/Web Farm configurations, we have to set sessionState mode to

StateServer/SQLServer in the web.config file.
7. What is the difference between Application and Session Events?

S.No Application Event Session Event

1 Application events are used to Session events are used to
initialize objects and data that initialize data that we want to keep
we do want to make available throughout individual sessions, but
to all the current sessions of that we do not want to share
our web application between sessions
8. What is the difference between Session Cookies and Persistent Cookies?

S.No Session Cookies Persistent Cookies

1 Session Cookies do not have Persistent Cookies have an expiration
expiration date date. The expiration date indicates to
the browser that it should write the
cookie to the client’s hard drive
9. What are the differences between Server Controls and HTML Controls?
S.No Server Controls HTML Controls

1 Server Controls can trigger HTML Controls can trigger only
control-specific events on the page-level events on server
server (postback)

2 Data entered in a server control Data is not maintained in an HTML
is maintained across requests. control. Data must be saved and
Server controls retain state restored using page-level scripts

3 The Microsoft .NET Framework HTML controls have HTML
provides a set of properties for attributes only
each server control. Properties
allows us to change the server
control’s appearance and
behavior within server-side code

4 Server controls automatically We must detect browser in code or
detect browser and adapt write for least common denominator
display as appropriate
10.What are the differences between ViewState and Hidden fields?

S.No ViewState Hidden fields

1 This is used for pages that will This is used for pages that will
postback to itself postback to itself or to another page

2 This is built in structure for This is not an inbuilt structure
maintaining state of a page

3 Security is more as data is Security is less when compared to
hashed, compressed and ViewState

encoded
11.What is the difference between SQL Cache Notification and SQL Cache
Invalidation?

S.No SQL Cache Notification SQL Cache Invalidation

1 Using SQL Cache Notification, we Using SQL Cache Invalidation, we
can generate notifications when can make a cached item invalid that
the data of a database on which a depends on the data stored in a SQL
cached item depends changes server database, when the data in the
SQL server database is changed
12.What is the difference between absolute time expiration and sliding
time expiration?

S.No Absolute time expiration Sliding time expiration

1 In absolute time expiration, a In sliding time expiration, the time for
cached item expires after the which the item is cached is each time
expiration time specifies for it, incremented by its expiration time if it
irrespective of how often it is is accessed before completion of its
accessed expiration time
13.What is the difference between adding items into cache through Add()
method and Insert() method?

S.No Cache.Add() Cache.Insert()

1 Cache.Add() method also returns Cache.Insert() method adds only the
an object representing the item item in the cache
we have added in the cache
,besides adding the item in the
cache

2 It is not possible to replace an We can replace an existing item in the
existing item in the cache using cache using the Cache.Insert()
the Cache.Add() method method
14.What is the difference between page-level caching and fragment caching?

S.No Page-level caching Fragment caching

1 In Page-level caching, we cache In Fragment caching, we cache parts
a whole page of the web page such as a user
control added to the web page
15.What is the difference between Label control and Literal control?

S.No Label control Literal control

1 Final HTML code of a Label Final HTML code of a Literal control
control has an HTML tag contains only text, which is not
surrounded by any HTML tag
16.What is the difference between HyperLink control and LinkButton control?

S.No HyperLink control LinkButton control

1 A HyperLink control do not have A LinkButton control have Click and
Click and Command events Command events, which can be
handled in the code behind file of the
web page
17.What is the difference between an HtmlInputCheckBox control and an
HtmlInputRadioButton control?

S.No HtmlInputCheckBox control HtmlInputRadioButton control

1 We can select more than one We can select only a single
HtmlInputCheckBox control from HtmlInputRadioButton control from a
a group of HtmlInputCheckBox group of HtmlInputRadioButton
controls controls
18.How a content page differs from a master page?

S.No Content page Master page

1 A content page does not have A master page has complete HTML
complete HTML source code source code inside its source file
19.How will you differentiate a submaster page from a top-level master page?

S.No Submaster page Top-level master page

1 Like a content page, a submaster Top-level master page has complete
page also does not have HTML source code inside its source
complete HTML source code file
20.What is the difference between a page theme control and a global theme?

S.No Page theme Global theme

1 A page theme is stored inside a A global theme is stored inside the
subfolder of the App_Themes Themes folder on a web server
folder of a web application

2 It can be applied to individual web It can be applied to all the web sites
pages of the web application on the web server
21.What is the difference between a default skin and a named skin?

S.No Default skin Named skin

1 A default skin does not have a A named skin has a SkinId attribute
SkinId attribute

2 It is automatically applied to all It is applied to a control explicitly by
the controls of the same type setting the SkinId property of the
present on a web page control from the Properties window
22.Differentiate Globalization and Localization

S.No Globalization Localization

1 Globalization is the process of Localization is the process of
identifying the specific portion of configuring a web application to be
a web application that needs to supported for a specific language or
be different for different locale
languages and isolating that
portion from the core of the web
application

2 example: example:
a)consider this tag in Web.Config we have 2 resource files:
file. a)default.aspx.fr-FR.resx
b)default.aspx.en-US.resx
It would cause the dates to be
displayed in French for the web Using appropriate coding in the
page of the folder where this .aspx.cs files of a web page, the
Web.Config file is located. strings written in these resource files
can be used to change the text of the
b) CultureInfo d=new strings dynamically.
CultureInfo("de-DE");
Response.Write(DateTime.Now.T
oString("D",d);
It would display date in long
format using German culture
23.What are the differences between web.config and machine.config?

S.No web.config machine.config

1 This is automatically created This is automatically installed when
when we create an ASP.Net web we install Visual Studio. Net
application project

2 This is also called application This is also called machine level
level configuration file configuration file

3 We can have more than one Only one machine.config file exists on
web.config file a server

4 This file inherits setting from the This file is at the highest level in the
machine.config configuration hierarchy

Reference: http://onlydifferencefaqs.blogspot.in/2012/07/aspnet-difference-faqsdoc.html

ASP.NET Difference FAQs-2
Difference between Web site and Web application

S.No Web site Web application

1 Can mix vb and c# page in We can't include c# and vb page
single website. in single web application.

2 Can not establish We can set up dependencies
dependencies. between multiple projects.

3 Edit individual files after Can not edit individual files after
deployment. deployment without recompiling.

4 Right choice when one Right choice for enterprise
developer will responsible environments where multiple
for creating and managing developers work unitedly for
entire website. creating,testing and deployment.

i.e.,In web site i.e.,In Web application, different
development, decoupling is different groups work on various
not possible. components independently like
one group work on domain layer,
other work on UI layer.

5 Web site is easier to create Web application is more difficult
than Web application to create than a Web site

Difference between Local storage and cookies

S.No Local storage Cookies

1 Good to store large amount Good for small amount of data, up
of data, up to 4MB to 4KB

2 Easy to work with the Difficult to work with JavaScript
JavaScript

3 Local storage data is not All data is transferred to and from
sent to the server on every server, so bandwidth is consumed
request (HTTP header) as it on every request
is purely at the client side

4 No way to specify the time Can specify timeout period so that
out period as the Cookies cookies data are removed from
have browser

Difference between Session and Cache

S.No Session Cache
1 Ssession retains state Cache is used for retaining state for
per user application scoped items.
2 Items put into a session Items in the cache can expire (will
will stay there, until the be removed from cache) after a
session ends specified amount of time. And also
there is no guaranty that objects will
not be removed before their
expiration times as ASP.NET remove

items from cache when the amount
of available memory gets small. This
process is called as Scavenging.
3 The session state can This is not the case with the cache.
be kept external (state
server, SQL server) and
shared between several
instances of our web
app (for load balancing).

Difference between Datalist and Repeater

S.No Datalist Repeater
1 Datalist supports multiple Repeater doesn't support multiple
columns displaying and columns display,no repeat columns
using repeat columns property
property
2 Datalist supports styles Repeater does not provide styles
for formating templates
data[headerstyle,...]
3 Datalist rendering Repeater performanace is better
output[html content]will than Datalist
be slow compare with
repeater.

Summary:
If the requirement can achieve using repeater and datalist,choose repeater for better
performance
Reference: http://onlydifferencefaqs.blogspot.in/2012/07/aspnet-difference-faqs-2.html

ASP.Net Difference FAQs-3

1.Difference between ASP.NET and PHP

S.No ASP.NET PHP

1 Technology Availability: Technology Availability:

ASP.NET was launched by PHP was launched by Rasmus
Microsoft in the year 2002. Lerdorf in the year 1995.

2 Database: Database:

ASP.Net uses MS-SQL for For point of database connectivity

connecting database but MS- PHP uses MySQL for the purpose
SQL can not be availed free of database connectivitybecasue
from Microsoft. its highly flexiblilty nature. Another
important fact is that it will
incurextra expenditure because
MySQL can be accessed for free.

3 Cost: Cost:
We need to install Internet
Information Server (IIS)on a Linux can be used for running PHP
Windows server platformif you programs and Linux is free
want to run ASP.Net program. operating system. Therefore,the
As Windows server platform is cost of developing a website in
not a free product,the cost of PHP language is remarkably low
production is bounded to be
increased.

4 Run Time : Run Time:
Whereas inbuilt memory space is
It has been observed that used by PHP while running.
ASP.Net code runs slower than
PHP code. This is because
ASP.Net utilizes server space
while running

5 Coding Simplicity: Coding Simplicity:
PHP codes are very simple and a
ASP.Net codes are somewhat programmer does not have to
complicated and a web make a diligent effort because it is
developer needs to work hard comparatively easier than other
to get the hang of it types of programming languages.

6 Platform Connectivity Issue : Platform Connectivity Issue:
PHP has a unique advantage in
ASP.NET codes are usually this issue. Its codes can be linked
run on Windows platforms but with different types of platforms
if you install ASP-Apache in such as Windows, Linux and UNIX.
the server than it can run on
Linux platform as well.

7 Cost of Tools : Cost of Tools :

There is no such free tools are PHP codes are available for free in
available for ASP.Net. various forums and blogs as it is a
open source software.
Furthermore, some useful tools
that can be used in PHP are also
available for free

8 The syntax of ASP.Net is more Language Support :
or less similar to that of Visual
basic syntax and this is all but The codes that are used in PHP

simple. are very much similar to that of C+
+ language and its syntax
resembles the syntax used in C
and C++. Therefore, if you have a
fair knowledge in C++ or C, you will
not face any difficulty while coding
PHP language.

9 Security : Security :

ASP. Net is reputed for Though PHP can offer enough
creating sophisticated measures for ensuring data
techniques to ensure the security
safety of confidential data.This
is the reason why government
organizations opt for ASP.Net.

2.Difference between ASP and ASP.NET

S.No ASP ASP.NET

1 ASP is a request response ASP.NET is a programming model
model. that is event driven.

2 ASP code is an interpreted ASP.NET is a compiled CLR code
language that is interpreted by that will be executed on the Server.
the script engine.

3 HTML and the coding logic are The code and design logic is
mixed in ASP. separated in ASP.NET.

4 To develop and debug ASP ASP.NET application can be
application, there are very developed and debugged using
limited tools. various tools including the leading
Visual Studio .NET tool.

5 ASP has limited support to ASP.NET is a complete Object
Object Oriented Programming Oriented Programming language.
principles.

6 Session management and ASP.NET extends complete
application state management support for session management
is very limited in ASP. and application state management.

7 Error handling system is poor ASP.NET offers complete error
in ASP. handling and exception handling
services.

8 ASP does not offer any in-built In ASP.NET, data exchange is
support for the XML. easily performed using XML
support.

9 Data source support is not fully Data source support is fully
distributed in ASP. distributed in ASP.NET.

3.Difference between ASP.NET and VB.NET

S.No ASP.NET VB.NET

1 ASP.NET is web technology VB.NET is a language that is used
that is used in building web in writing programs that are utilizing
applications and websites. the ASP.NET framework.

2 ASP.NET is a server side VB.NET is a .NET programming
technology that is language language. VB.NET is used to
independent. Any .NET create ASP.NET web applications
languages such as C#, or windows applications using
VB.NET can be used to Visual Studio Windows Forms
develop web applications Designer or mobile applications or
through ASP.NET. console applications or applications
for variety of other purposes.

3 ASP.NET is included within the VB.NET is not part of .NET
.NET framework. framework.

For example, ASP.NET For example, VB.NET is the code
contains the text boxes and the that is written on various events of
controls that can be dragged text boxes and controls to make
and dropped into a web form. them function as per the
requirement.

4 ASP.NET contains server VB.NET does not include server
controls. controls.

5 ASP.NET can support all .NET VB.NET can support only scripting
languages. languages.

4.Difference between Java and .NET

S.No Java .NET

1 JAVA is developed by ‘Sun .NET is developed by ‘Microsoft’.
Microsystem‘

2 JAVA is a programming .NET is a framework that supports
language many programming languages like
C#,ASP,VB.

3 In JAVA, JVM(Java Virtual In .NET CLR(common language
Machine) execute the code Runtime) execute the code with
and convert source code to two phase compilation.
byte code.

4 JAVA can run on any .NET can run only on windows/IIS.
operating system

5 But in JAVA it depends upon Although .NET support both explicit
the programmer to destroy the and implicit garbage
garbage memory. collection,especially,in .NET the
garbage collector destroy the
garbage value in an efficient
manner as compared to JAVA.

6 JDBC is used for database ADO .NET is use for database
connection in JAVA connection in .NET.

7 For java many third party .net has a standard development
IDEs are available. IDE i.e. Microsoft Visual Studio

8 But web application in java run Both windows and web
on any operating system. applications can developed by
.net but it will be more better to go
for windows application with .NET .
you can also go for web application
with .NET but it will only hosted on
windows server.

9 Exception Handling in Java is Exception Handling in .NET is
harder than .NET simpler than JAVA.

10 JAVA uses bootclasspath for .NET uses GAC(Global Assembly
completely trusted codes. Cache) and keep trusted
assemblies.

11 Java is less secure than .NET JAVA and .NET both have similar
while providing security security goals. But .NET is more
secure because of its simple and
clean designs.

12 Java JDBC which requires .Net due to disconnected data
multiple round trips to data access through ADO.Net has high
base. Hence, performance is level of performance against Java
lesser than .NET JDBC

13 Development is comparatively Due to Microsoft Visual Studio,
slower. development is faster.

14 Java applications development Microsoft Visual Studio installation
can be done on even less requires higher configuration
configuration computer system.
system.

15 Java can only communicate .Net is the platform itself for a
with java programs multitude of languages. One can
use C, C++ and VB to program
upon .net. These programs interact

with each other using common
methods. these common methods
are defined by .Net, and are used
by the programs to communicate
with each other without worry about
that language the program was
written in. the machine running the
program/s will need the .Net
platform to be installed.



1.Difference between HTTP and HTTPS

S.No HTTP HTTPS

1 URL begins with “http://" in URL begins with “https://” in case of
case of HTTP HTTPS.

2 HTTP is unsecured HTTPS is secured.

3 HTTP uses port 80 for HTTPS uses port 443 for
communication communication.

4 HTTP operates at Application HTTPS operates at Transport
Layer Layer.

5 No encryption is there in HTTP HTTPS uses encryption.

6 No certificates required in certificates required in HTTPS.
HTTP

7 Most internet forums will HTTPS should be used in Banking
probably fall into this category. Websites, Payment Gateway,
Because these are open Shopping Websites, Login Pages,
discussion forums, secured Emails (Gmail offers HTTPS by
access is generally not default in Chrome browser) and
required Corporate Sector Websites. For
example:

PayPal: https://www.paypal.com
Google AdSense:
https://www.google.com/adsense/

2.Difference between GET and POST methods

S.No GET POST

1 Post Mechanism: Post Mechanism:

GET request is sent via URL. Post request is sent via HTTP
request body or we can say
internally.

2 Form Default Method: Form Default Method:

GET request is the default We have to specify POST method
method. within form tag like

3 Security: Security:

Since GET request is sent via Since Post request encapsulated
URL, so that we can not use name pair values in HTTP request
this method for sensitive data. body, so that we can submit
sensitive data through POST
method.

4 Length: Length:

GET request has a limitation POST request has no major
on its length. The good limitation.
practice is never allow more
than 255 characters.

5 Caching or Bookmarking: Caching or Bookmarking:

GET request will be better for POST request is not better for
caching and bookmarking. caching and bookmarking.

6 SEO: SEO:

GET request is SEO friendly. POST request is not SEO friendly.

7 Data Type: Data Type:

GET request always submits POST request has no restriction.
data as TEXT.

8 Best Example: Best Example:

SEARCH is the best example LOGIN is the best example for
for GET request. POST request.

9 HTTP Request Message HTTP Request Message Format:
Format:
1 POST /path/script.cgi HTTP/1.0
1 GET /path/file.html? 2 From: umarali1981@gmail.com
SearchText=Interview_Questio 3 User-Agent: HTTPTool/1.0
n HTTP/1.0 4 Content-Type: application/x-
2 From: www-form-urlencoded
umarali1981@gmail.com 5 Content-Length: 8
3 User-Agent: HTTPTool/1.0 6
4 [blank line here] 7 Code=132
Some comments on the limit on QueryString / GET / URL parameters Length:

1. 255 bytes length is fine, because some older browser may not support more than that.
2. Opera supports ~4050 characters.
3. IE 4.0+ supports exactly 2083 characters.
4. Netscape 3 -> 4.78 support up to 8192 characters.
5. There is no limit on the number of parameters on a URL, but only on the length.
6. The number of characters will be significantly reduced if we have special characters like
spaces that need to be URLEncoded (e.g. converted to the '%20').
7. If we are closer to the length limit better use POST method instead of GET method.

3.Difference between User Controls and Master Pages

S.No User Controls Master Pages

1 Its extension is .ascx. Its extension is .Master.

2 Code file: .ascx.cs or .ascx.vb code file: .master.cs or .master.vb
extension

3 A page can have more than Only one master page can be
one User Controls. assigned to a web page

4 It does not contain It contains ContentPlaceHolder.
Contentplaceholder and this
makes it somewhat difficult in
providing proper layout and
alignment for large designs.

5 Suitable for small designs(Ex: More suitable for large designs(ex:
logout button on every .aspx defining the complete layout of
page.) .aspx page)

6 Register Tag is added when MasterPageFile attribute is added
we drag and drop a user in the Page directive of the .aspx
control onto the .aspx page. page when a Master Page is
referenced in .aspx page.

7 Can be attached dynamically Can be referenced using
using LoadControl Web.Config file also or dynamically
method.PreInit event is not by writing code in PreInit event.

mandatory in their case for
dynamic attachment.

4.Difference between Build and Rebuild

S.No Build Rebuild

1 A build compiles only the files A rebuild rebuilds all projects and
and projects that have files in the solution irrelevant of
changed. whether they have changed or not.

2 Build does not updates the Rebuild updates the xml-
xml-documentation files documentation files

Note: Sometimes,rebuild is necessary to make the build successful. Because, Rebuild
cleans Solution to delete any intermediate and output files, leaving only the project and
component files, from which new instances of the intermediate and output files can then be
built.

5.Difference between generic handler and http handler

S.No Generic Handler Http Handler

1 Generic handler has a handler http handler is required to be
which can be accessed by url configured in web.config against
with .ashx extension extension in web.config.It does not
have any extension

2 Typical example of generic For http handler, page handler
handler are creating which serves .aspx extension
thumbnails of images request and give response.


ASP.Net Difference FAQs-5

1.Difference between ViewState and SessionState

S.No ViewState SessionState

1 View state is maintained in Session state is maintained in
page level only. session level.

2 View state of one page is not Session state value is available in
visible in another page.i.e., all pages within a user session.i.e.,

when user requests another The data will be no longer available
page previous page data will if user close the browser or
be no longer available. session timeout occurs.

3 View state information stored Session state information stored in
in client only. server.

4 View state persist the values of Session state persist the data of
particular page in the client particular user in the server. This
(browser) when post back data available till user close the
operation done. browser or session time completes.

5 View state used to persist Session state used to persist the
page-instance-specific data. user-specific data on the server
side.

2.Difference between ViewState and ControlState

S.No ViewState ControlState

1 ViewState can be disabled Control State cannot be disabled.

2 ViewState is implemented by Control State works even when
using EnableViewState EnableViewState is off.
property of a control to true. To use Control State (for example
in a custom control) we have to
override OnInit method,call
RegisterRequiresControlState
method in OnInit method and then
override the SaveControlState and
LoadControlState methods.

3 ViewState is used to maintain Control State is used for small data
page-level state for large data only.
eg: maintain clicked page number
in a GridView even when
EnableViewState is off

3.Difference between SessionState and Cookies

S.No SessionState Cookies

1 Session can store any type of Cookies can store only "string"
data because the value is of datatype
datatype of "object"

2 These are stored at Server They are stored at Client side
side

3 Session are secured because Cookie is non-secure since stored

it is stored in binary in text format at client side
format/encrypted form and it
gets decrypted at server

4 Session is independent for Cookies may or may not be
every client i.e individual for individual for every client
every client

5 There is no limitation on size or Due to cookies network traffic will
number of sessions to be used increase.Size of cookie is limited to
in an application 40 and number of cookies to be
used is restricted to 20.

6 For all conditions/situations we Only in few situations we can use
can use sessions cookies because of no security

7 We cannot disable the We can disable cookies
sessions.Sessions can be
used without cookies also(by
disabling cookies)

8 The disadvantage of session is Since the value is string there is no
that it is a burden/overhead on security
server

9 Sessions are called as Non- We have persistent and non-
Persistent cookies because its persistent cookies
life time can be set manually


1.Difference between DataGrid and GridView

S.No DataGrid GridView

1 Sorting: In DataGrid code Sorting: In case of GridView no
requires to handle the additional code required.
SortCommand event and
rebind grid required.

2 Paging: In DataGrid requires Paging: In case of GridView no
code to handle the additional code required. It also
PageIndexChanged event and supports customized appearance.
rebind grid required.

3 Data binding: Like GridView Data binding: GridView can bind
DataGrid cannot bind with new with new datasource control
datasource control in ASP.NET
2.0.

4 Updating data: DataGrid Updating data: GridView requires
requires extensive code to little code. Code like exceptions
update operation on data handling for database part.

5 Events: In DataGrid less Events: GridView supports events
events supported as compared fired before and after database
to GridView. updates.

2.Difference between ListView and GridView

S.No ListView GridView

1 Data Grouping: In-built Data Grouping: To provide this
support for this functionality is functionality, we need to write
provided. custom code.

2 Provide Flexible Layout: In- Provide Flexible Layout: To
built support for this provide this functionality, we need
functionality is provided. to write custom code

3 Insert: In-built support for this Insert: To provide this functionality,
functionality is provided. we need to write custom code

3.Difference between DataList and GridView

S.No DataList GridView

1 Paging: To provide this Paging: In-built support for this
functionality, we need to write functionality is provided.
custom code.

2 Provide Flexible Layout: In- Provide Flexible Layout: To
built support for this provide this functionality, we need
functionality is provided. to write custom code

3 Update,Delete: To provide this Update,Delete: In-built support for
functionality, we need to write this functionality is provided.
custom code

4 Data Grouping: In-built Data Grouping: To provide this
support for this functionality is functionality, we need to write
provided. custom code.

5 Sorting:To provide this Sorting:In-built support for this

custom code.

4.Difference between Repeater and ListView

S.No Repeater ListView

1 Paging: To provide this Paging: In-built support for this
custom code.

2 Data Grouping: To provide Data Grouping: In-built support for
this functionality, we need to this functionality is provided.
write custom code.

3 Insert: To provide this Insert: In-built support for this
custom code

4 Update,Delete: To provide this Update,Delete: In-built support for
functionality, we need to write this functionality is provided.
custom code

5 Sorting:To provide this Sorting:In-built support for this
custom code.

5.Difference between Repeater and DataList

S.No Repeater DataList

1 Repeater is template driven DataList is rendered as Table.

2 Repeater cannot automatically DataList can automatically
generates columns from the generates columns from the data
data source source

3 Row selection is not supported Row selection is supported by
by Repeater DataList

4 Editing of contents is not Editing of contents is supported by
supported by Repeater DataList

5 Arranging data items We can arrange data items
horizontally or vertically is not horizontally or vertically in DataList
supported by Repeater


1.Difference between trace and debug in .NET

S.No Trace Debug

1 This class works only when This class works only when your
your application build defines application build defines the
the symbol TRACE. symbol DEBUG.

2 For tracing, you have to use For tracing, you have to use
Trace.WriteLine statements. Debug.WriteLine statements.

3 Trace class is generally used You generally use debug classes at
to trace the execution during the time of development of
deployment of the application. application.

4 Trace class works in both Debug class works only in debug
debug mode as well as release mode.
mode.

5 Performance analysis can be Performance analysis cannot be
done using Trace class. done using Debug class.

6 Trace runs in a thread that is Debug runs in the same thread in
different from the Main Thread. which your code executes.

7 Trace is used during Testing Debug is used during Debugging
Phase and Optimization Phase Phase
of different releases.

2.Difference between ASP and ASPX

S.No ASP ASPX

1 The .asp is the file extension of The .aspx is the file extension of
the classic ASP page. ASP.NET page.

2 ASP stands for Active Server ASPX is the acronym of Active
Pages. Server Pages Extended.

3 The .asp file runs under the The .aspx file runs in a separate
process space of inetinfo.exe, worker process called as
which is an IIS process space. aspnet_wp.exe.

4 The .asp file can execute only The .aspx file can run on any
in platforms of Microsoft platforms, be it Microsoft or not.
technology. It cannot run in Hence .aspx file can be executed
non-Microsoft platforms like in Apache Web Server as well.
Apache Web Server.

5 The .asp file can be coded in The .aspx file can be coded using
only two languages namely any .NET language including
VBScript and Javascript. Both VB.NET, C#. Both VB.NET and C#

these languages are client side are Server Side Languages.
languages.

6 In .asp file, the executable In .aspx file, the executable code
code can be included outside a cannot be included outside a
function scope where in the function scope where in the
function is located inside the function is located inside the script
script block marked as block marked as runat=server.
runat=server.

7 In .asp file, a function can be In .aspx file, a function cannot be
defined inside server side defined inside server side script
script tags. tags.

8 In .asp file, all the directives In .aspx, the language directive
will be placed in the page’s first must be enclosed within page
line using <%@Page directive as <%@Page Language=
Language= “Jscript” %> tag. “VB” %>

3.Difference between thread and process

S.No Thread Process

1 Threads share the address Processes have their own address.
space of the process that
created it.

2 Threads have direct access to Processes have their own copy of
the data segment of its the data segment of the parent
process process.

3 Threads can directly Processes must use interprocess
communicate with other communication to communicate
threads of its process with sibling processes.

4 Threads have almost no Processes have considerable
overhead overhead

5 New threads are easily created New processes require duplication
of the parent process.

6 Threads can exercise Processes can only exercise
considerable control over control over
threads of the same process child processes

7 Changes to the main thread Changes to the parent process
(cancellation, priority change, does not
etc.) may affect the behavior of affect child processes.
the other threads of the
process

Another good reference:
http://www.differencebetween.net/miscellaneous/difference-between-thread-and-process/

4.Difference between ASPX and ASCX

S.No ASPX ASCX

1 ASP.NET Page uses the User Control uses the extension
extension .aspx .ascx
For eg: Default.aspx For eg: WebUserControl.ascx.

2 ASP.NET Page begin with a User Control begin with a Control
Page Directive. Directive.
For eg: For eg:
<%@ Page Language="C#" <%@ Control Language="C#"
AutoEventWireup="true" AutoEventWireup="true"
CodeFile="Default.aspx.cs" CodeFile="WebUserControl.ascx.c
Inherits="_Default" %> s"
Inherits="WebUserControl" %>

3 Usercontrol code can be used We can not use webforms in
in webforms usercontrol.

4 ASP.NET Page can be viewed User Control cannot be viewed
directly in the Browser. directly in the browser. User
Controls are added to WebPages
and we view them by requesting a
web page in our browser

5 ASP.NET page has HTML, User Control does not have a
Body or Form element. HTML, Body or Form element.


1.Difference between HTML Controls and ASP.NET Standard Controls

S.No HTML Controls ASP.NET Standard Controls

1 All HTML Controls run at Client All ASP.NET Controls run at Server
side side

2 Can be made to run at Server Can’t be made to run at Client side
side by adding runat=”server” rather equivalent HTML code is
attribute generated on Rendering

3 Rendering is NOT Required Rendering is Required

4 Execution is FAST Execution is SLOW

5 Don’t contain any class for the Contains Separate class for each
Controls Controls

6 Don’t support Object Oriented Supports Object Oriented
Programming features Programming Features

7 Don’t provide STATE Provides STATE MANAGEMENT
MANAGEMENT
2.Difference between Response.Redirect and Server.Transfer

S.No Response.Redirect Server.Transfer

1 Used to redirect to any Used to redirect to any webpage in
webpage in any website current website only

2 Can be used to pass the Can’t be used to pass the required
required values from Source values from Source Page to Target
Page to Target Page while Page while redirecting
redirecting

3 Execution is Slow Execution is Fast

4 Target page address appears Target page address doesn’t
within the address bar appears within the address bar

5 Refreshing of the page doesn’t Refreshing of the page causes
cause any error error
3.Difference between ASP.NET and ASP.NET MVC

S.No ASP.NET ASP.NET MVC

1 You need .NET framework to You need .NET framework &
install ASP.NET. ASP.NET to Install MVC.

2 Supports Code behind page Supports both Code behind page
coding & Inline coding coding & Inline coding but, we
should not use code behind as a
practice because view should not
perform any logic.

3 Pages are called Pages Pages are called Views

4 There is a Life cycle for every There is tailored lifecycle of the
page. page. By default you won't see the
events when you create the Views
but, you can add the Page Load
event by in a script server tag.
Again its not a good practice

5 We use Viewstate concept There is no Viewstate for view.
extensively There is no state of the controls.
But state of the entire page can be
maintained by a feature

ModelBinders

6 Every Page is inherited from Every Page is inherited from
System.Web.UI.ViewPage System.Web.Mvc.ViewPage.
View page is inherited from
System.Web.UI.Page.

7 You don't have the strongly You can create the Strongly typed
typed pages Views using generics. It means,
you can pass the object (Model) to
the view page from the controller.

8 Has lot of inbuilt Controls that We cannot use the ASP.NET
support RAD. controls because they don't
support the ViewState and
Postback.

We have inbuilt methods called
HTML Helper methods. These
methods just create the required
HTML in the response stream. You
can create the user controls.

9 Has the limited control over the Since we have no controls and are
HTML being generated by writing HTML we have control over
various controls. the markup.

10 Logic is not completely Logic is modularized in methods
modularized in pages. called Action methods of the
controller.

11 Difficult to test the UI Logic MVC is designed to unit test
using unit tests. every part of the application. It
strongly supports the TDD
approach.

12 Doesn't support clean or Support clean or search engine
search engine friendly friendly URL's
URL's . ASP.NET 4 has the You can design to support the
routing module or else REST based resources in
we need to use URL rewrites. application

13 Code behind supports only one Web request finally will reach
aspect of separation of the controller. Requests never
concerns. reach Views. Web user cannot
identify a specific view on the
server.

14 Web requests are reached Web request finally will reach
directly to the intended the controller. Requests never
page. Web users can identify reach Views. Web user cannot
the pages on the server. identify a specific view on the
server.

15 If you rename the web pages You don't need to change the URL,
the URL is changed even if you change the Controller
and the View.

16 URLS are determined by the You have to define the URL
folder structure of the pages formats which are called Routes.
Framework will try to match the
URL with all the defined routes in
an order.
Framework will hand over the
request to the corresponding route
Handler.

17 Query string are used as small URLS formats drive the inputs to
inputs to the pages the requests. You can also have
querystrings

18 Related Pages are separated Related Views are written under
by folder controller. And for each controller
we need to create a folder for all its
views.

19 We have ASP.NET AJAX MVC has some AJAX features but
Framework and AJAX server internally it uses the ASP.NET
side controls to support AJAX AJAX script libraries. So we have
page development to manually include the libraries in
the project. No support of AJAX
Server side controls.

20 File extensions in IIS are There are no file extensions for
mapped to ASP.NET isapi dll MVC. If deployed in IIS7 Internally
and in web.config they are it will use the MVC
mapped to corresponding file UrlRoutingModule to route the
HTTPHandlers. request to the MVC framework.

21 All the Page requests are Each Route has the option to use a
handled by PageFactory default Route handler or custom
Handler. handler. So all the page requests
are handled by Route handles.

22 It's difficult to modify the It's designed to modify or replace
internal behavior of the core the internal components. It
ASP.NET components. supports the Plug-in structure

Example: - ASPX Pages are used
to render the HTML. You can
configure to not to use ASP.NET
pages and use different view
engines.

There are many view engines
available in market or you can

create your own view engine.


Difference Between HttpHandler and HttpModule
Difference between HttpHandler and HttpModule

S.No HttpHandler HttpModule

1 Meaning: Meaning:

An ASP.NET HTTP handler is An HTTP module is an assembly
the process (frequently that is called on every request that
referred to as the "endpoint") is made to our application. HTTP
that runs in response to a modules are called as part of the
request made to an ASP.NET ASP.NET request pipeline and
Web application. The most have access to life-cycle events
common handler is an throughout the request. HTTP
ASP.NET page handler that modules examine incoming and
processes .aspx files. When outgoing requests and take action
users request an .aspx file, the based on the request.
request is processed by the
page through the page
handler. We can create our
own HTTP handlers that
render custom output to the
browser.In order to create a
Custom HTTP Handler,we
need to Implement
IHttpHandler
interface(synchronous handler)
or
Implement
IHttpAsyncHandler(asynchrono
us handler).

2 RSS feeds: To create an RSS When to use HTTP modules:
feed for a Web site, we can
create a handler that emits Security: Because we can
RSS-formatted XML. We can examine incoming requests, an
then bind a file name extension HTTP module can perform custom
such as .rss to the custom authentication or other security
handler. When users send a checks before the requested page,
request to your site that ends XML Web service, or handler is
in .rss, ASP.NET calls our called. In Internet Information
handler to process the request. Services (IIS) 7.0 running in
Image server: If we want a Integrated mode, we can extend
Web application to serve forms authentication to all content
images in a variety of sizes, we types in an application.
can write a custom handler to Statistics and logging: Because

resize images and then send HTTP modules are called on every
them to the user as the request, we can gather request
handler’s response. statistics and log information in a
centralized module, instead of in
individual pages.
Custom headers or footers:
Because we can modify the
outgoing response, we can insert
content such as custom header
information into every page or XML
Web service response.

3 How to develop an ASP.NET How to develop a Http Module:
handler:
All we need is implementing
All we need is implementing System.Web.IHttpModule interface.
IHttpHandler interface
public class MyHttpModule :
public class MyHandler IHttpModule
:IHttpHandler {
{ public void Dispose()
public bool IsReusable {
{
get { return false; } }
}
public void Init(HttpApplication
public void context)
ProcessRequest(HttpContext {
context) //here we have to define handler for
{ events such as BeginRequest
,PreRequestHandlerExecute
} ,EndRequest,AuthorizeRequest
} and ....

}

// you need to define event
handlers here
}

4 Number of HTTP handler Number of HTTP module called:
called:
Whereas more than one HTTP
During the processing of an modules may be called.
http request, only one HTTP
handler will be called.

5 Processing Sequence: Processing Sequence:

In the asp.net request pipe line In the asp.net request pipe line,
,http handler comes after http http Module comes first.

Module and it is the end point
objects in ASP.NET pipeline.

6 What it does actually? What it does actually?

HTTP Handler actually HTTP module can work on request
processes the request and before and on the response after
produces the response HTTP Handler

7 HTTP Handler implement Http Module implements
following Methods and following Methods and
Properties: Properties:

Process Request: This InIt: This method is used for
method is called when implementing events of HTTP
processing asp.net requests. Modules in HTTPApplication
Here you can perform all the object.
things related to processing Dispose: This method is used
request. perform cleanup before Garbage
IsReusable: This property is to Collector destroy everything.
determine whether same
instance of HTTP Handler can
be used to fulfill another
request of same type.

8 Summary: Summary:

If we need to create a request If we want to modify a certain
handler, for example we may request, like we may want to
want our own code to handle perform some custom logic behind
all .jpg image file requests like: the scenes whenever user
http://mysite.com/filename.jpg, requests pages like
then we need to use mysite.com/default.aspx, we need
HttpHandlers for this purpose. to use HttpModules. We can create
multiple HttpModules to filter any
request.

Reference: http://onlydifferencefaqs.blogspot.in/2012/08/difference-between-httphandler-and.html

1.Difference between .NET Application Development and Traditional Application
Development

S.No .NET Application Traditional Application
Development Development

1 Using .NET Framework, your Your program will be compiled into
program will be compiled into an assembly language code that is
an intermediate language very specific to the platform in
representation called MSIL which you are running your

(Microsoft Intermediate application.
Language).

2 MSIL code will not contain any Assembly language code will
API calls specific to any contain API calls specific to the
platform. current application platform.

3 This MSIL code is then This assembly language code is
converted into machine code then converted into machine code.
at runtime using CLR
(Common Language Runtime).

4 Optimization is done at runtime Optimization is done by the
by CLR. compiler itself at compile time.

5 The compiler used in this The compiler is not static. It
process is static meaning that performs both compilation as well
it checks only for syntax and as optimization.
the necessary semantics.

6 Libraries used by your program Libraries used by your program are
are linked even before linked only after generating the
generating MSIL, but it is machine code.
linked in an un-compiled form.
This will be compiled by the
compiler and it will be used by
the CLR while executing the
program.

7 The program will not directly Now the program is ready for
call APIs of the operating execution by the operating system.
system. Instead CLR will act The program will directly call APIs
as a mediator. CLR will call of the operating system.
API's of operating system and
the result of execution will be
returned to program.

8 Automatic memory No automatic memory
management and garbage management or garbage collection.
collection is done by CLR.

9 .NET Framework Class Library No object oriented principles are
provides object oriented incorporated.
libraries.

2.Difference between CSS and Themes

S.No CSS Themes

1 Applies to all HTML Controls Applies to all the server controls

2 Is applied on the Client Side in Is applied on the server rather than
the Browser in the browser

3 We can apply multiple style But we cannot apply multiple
sheets to a single page themes to a single page. Only one
theme we can apply for a single
page.

4 The CSS supports cascading But themes does not support
cascading

5 The CSS cannot override the But any property values defined in
property values defined for a a theme, the theme property
control. overrides the property values
declaratively set on a control,
unless we explicitly apply by using
the StyleSheetTheme property.

6 Cannot be Applied through the Can be Applied through
configuration files Configuration Files.

7 Can be used directly via a All theme and Skin files should be
reference to the css file placed in a special Asp.net folder
location called the “App_Themes” in order
for the themes to work and behave
normally.

8 Do not require any other Each theme should be associated
resource like Skin files with at least one Skin file.

9 In case of CSS you can define But a theme can define multiple
only style properties properties of a control not just style
properties such as we can specify
the graphics property for a control,
template layout of a GridView
control etc.
3.Difference between Postback and Callback

S.No Postback Callback

1 A Postback occurs when the A callback is also a special kind of
data (the whole page) on the postback, but it is just a quick
page is posted from the client round-trip to the server to get a
to the server..ie the data is small set of data(normally), and
posted-back to the server, and thus the page is not refreshed,
thus the unlike with the postback.
page is refreshed.

2 With Asp.Net, the ViewState is With Asp.Net, the ViewState is not
refreshed when a postback is refreshed when a callback is
invoked. invoked.

3 A postback occurs when a A callback, generally used with
request is sent from the client AJAX,
to the server for the same occurs when a request is sent from
page as the one the user is the
currently viewing. When a client to the server for which the
postback occurs, the entire page is not refreshed, only a part of
page is refreshed and you can it is updated without any flickering
see the typical progression on occurring on the browser.
the progress bar at the bottom
of the browser.
4.Difference between Session.Clear() and Session.Abandon()

S.No Session.Clear() Session.Abandon()

1 Session.Clear() just removes Session.Abandon() destroys the
all values (content) from the session and the Session_End
Object. The session with the event is triggered and in the next
same key is still alive.It is just request, Session_Start will be fired.
like giving value null to this
session.

2 Use Session.Clear(), if we So, if we use Session.Abandon(),
want user to remain in the we wil lose that specific session
same session and we don not and we will get a new session key.
want user to relogin or reset all We could use it for example when
his session specific data. the user logs out.


Difference between ASP.Net 2.0 and ASP.Net 3.5
Difference between ASP.Net 2.0 and ASP.Net 3.5

SNo Feature ASP.Net 2.0 ASP.Net 3.5

1 New Features ASP.Net 2.0 includes the ASP.Net 3.5 includes the
following as new features, following as new features,

1. Master Pages 1. ListView Control
2. Profiles 2. DataPager Control
3. GridView Control 3. Nested Master Pages
4. LinqDataSource Control

2 Multi-targeting ASP.Net 2.0 does not ASP.Net 3.5 supports multi-
support Multi-Targeting targeting. It means that we
environment. choose from a drop-down list
whether to have Visual Studio
2008 build applications against
the ASP.NET 2.0, 3.0, or 3.5

Dotnet differences compiled -1

Dotnet differences compiled -1

Recommended

Recommended

More Related Content

What's hot

What's hot (20)

Viewers also liked

Viewers also liked (20)

Similar to Dotnet differences compiled -1

Similar to Dotnet differences compiled -1 (20)

More from Umar Ali

More from Umar Ali (20)

Recently uploaded

Recently uploaded (20)

Dotnet differences compiled -1