1. JNTU ONLINE EXAMINATIONS [Mid 1 - co ]
1. Computer design is concerned with [01D01] The determination of what hardware should be used and how the parts be connected.
2. A digital computer with more than one processor is called as [01D02] Multiprocessor System
3. Computer Organization is concerned with [01M01] The way hardware components operate and connected together to form Computer
system.
4. Computer architecture is concerned with [01M02]The structure and behavior of the computer as seen by the user.
5. In a computer system control information is transferred in [01M03] control bus only
6. The part of the hardware of computer that controls the transfer of information between computer and the outside IOP
7. The part of the hardware of computer that is used to manipulate data is [01S02] CPU
8. The functional entity of computer system that does not have physical existence is [01S03] Software
9. Digital computers use [01S04] Binary number system
10. A system software is [01S05] A program to make effective use of computer
11. Which of the following statement(s) is(are) correct? [01S06] Instructions in a stack-based organization take up less memory than
general purpose register organization instructions.
12. Signed 1's complement representation of -14 with eight bits is [02D01] 11110001
13. 2's complement representation of -32 with eight bits is [02D02]11100000
14. The 1' s complement of decimal number 21 in binary is [02M01] 01010
15. Signed 2's complement representation of +14 with eight bits is [02M02] 00001110
16. 2's complement representation of 16 with eight bits is [02M03] 00010000
17. The complement of decimal number 85 is [02S01]14
18. The complement of decimal number 65 is [02S02] 35
19. The 1's complement of binary number 01011011 is [02S03] 10100100
20. The 2's complement of binary number 01010001 is [02S04] 10101111
21. Signed magnitude representation of -7 with eight bits is [02S05] 10000111
22. The advantage with normalized floating-point number is [03D01] provide maximum possible precision
23. A floating point number is said to be normalized [03D02] if the most significant digit of the mantissa is nonzero
24. In floating point representation the radix [03M01] is assumed and not represented physically
25. In floating point representation the radix position [03M02] is assumed and not represented physically
26. A normalized floating-point decimal number is [03M03] 3.456
27. The two parts in floating-point representation are [03S01] mantissa , exponent
28. The part in floating-point representation that denotes position of the radix point is [03S02] exponent
29. In floating point representation, the fixed point mantissa [03S03]may be fraction or integer
30. In floating point representation, the fixed point mantissa [03S04] is signed number
31. A normalized floating-point binary number is [03S05] 1.010
32. Odd parity generator can be implemented with [04D01] Exclusive - OR & Exclusive - Nor function
33. If 3 bit messages are transmitted suffixing with P (odd) bit the erroneous message is [04D02] 1010
34. Parity checker networks are constructed with logic circuits comprising [04M01]exclusive OR logic gates
35. Even parity generators can be implemented with [04M02] exclusive OR functions
36. If 3 bit messages are transmitted suffixing with P (even) bit the erroneous message is [04M03] 0100
37. If a 3 bit message 010 is transmitted with suffix of even parity bit , the resultant message is [04S01]0101
38. If a 3 bit message 101 is transmitted with suffix of even parity bit , the resultant message is [04S02] 1010
39. If a 3 bit message 110 is transmitted with suffix of odd parity bit , the resultant message is [04S03]1101
40. If a 3 bit message 011 is transmitted with suffix of odd parity bit , the resultant message is [04S04] 0111
41. Even parity generator is constructed with logic circuits comprising [04S05] exclusive OR logic gates
42. A Common bus system is connected with four registers of 4-bit capacity using binary MUXs . The number of MUXs 4
43. A Common bus system is connected with four registers of 4-bit capacity using binary MUXs. The size of each MUX each 4 X 1
44. The function that allows register transfer under a predetermined condition is [05M01] Control function
45. The state of the three-state gate when input is not connected to output is [05M02] high impedence state
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2. 46. Register transfer denoting memory write operation is [05M03] M {[AR]}_DR
47. The operation executed on data stored in registers is called [05S01] Micro operation
48. The symbolic notation used to describe the micro operation transfers among registers is called [05S02]Register Transfer language
49. The symbolic form used to denote transfer of content of register R1 into register R2 is [05S03] R2<-R1
50. The arithmetic micro operation R3_R1+ +1 denotes [06D01] Subtraction of R2 from R1
51. The arithmetic micro operation denoting negation is [06D02] R2 R2_ +1
52. The arithmetic micro operation R2_ +1 denotes [06M01]2's complement of R2
53. The arithmetic micro operation denoting subtraction of R3 from R1 is [06M02] R1_R1+ R3’+1
54. The arithmetic micro operation denoting 2's complement is [06M03] R1_ R1’+1
55. The arithmetic micro operation denotes [06S01]The sum of R1 and R2 is transferred to R3
56. On executing the arithmetic micro operation R2_ [06S02] Content of R2 is Complemented
57. The arithmetic micro operation denoting decrementing the content of R1 by one is [06S03] R1_R1-1
58. The arithmetic micro operation denoting 1's complement is [06S04] R1_ R1’+1
59. The arithmetic micro operation denoting complement is [06S05]R1_R1’
60. The logic micro operation used to selectively set bits is [07G02]F_B A
61. The logic micro operation used to selectively clear bits is [07G03] F_A U’B
62. The logic Micro operation that denotes clear is [07S01] F_0
63. The logic micro operation that denotes AND is [07S02] F_A U’B
64. The logic micro operation that denotes transfer A is [07S03] F_A
65. The logic micro operation that denotes exclusive NOR is [07S04] F<-(A+B)’
66. The logic micro operation that denotes complement of B is [07S05] F_B’
67. The category of micro operation used for serial transfer of data is [08D01] shift micro operation
68. The function denoted by arithmetic operation F=A+ is [08D02] subtraction with borrow
69. The shift micro operation used to multiply signed binary number by 2 is [08M01] Arithmetic shift left
70. The shift micro operation used to divide signed binary number by 2 is [08M02]Arithmetic shift right
71. The function denoted by arithmetic operation F=A+B+1 is [08M03] Add with carry
72. If the content of 8 bit register R1 is 11010011 . The content of register R1 after execution of R1_shr R1 micro operation
01101001
73. If the content of 8 bit register R1 is 11010011. The content of register R1 after execution of R1_shl R1 micro operation
10100110
74. If the content of 8 bit register R1 is 10001101. The content of register R1 after execution of R1_Cir R1 micro operation
11000110
75. If the content of 8 bit register R1 is 11010011. The content of register R1 after execution of R1 _ ashr R1 micro operation is
[08S04]11101001
76. The function denoted by arithmetic operation F=A-1 is [08S05] decrement
77. The general-purpose computer register is [09D01] Accumulator
78. In direct addressing mode address part of instruction specifies [09M01] Address of operand in memory
79. The computer register used to hold address of instruction is [09M02] Program counter
80. The computer register that specifies memory address is [09M03] Address register
81. If it takes 5ns to read an instruction from memory, 2ns to decode the instruction, 3ns to read the register file, 4ns to perform the
computation requiredby the instruction, and 2ns to write the result into the register file, what is the maximum 62.5 MHz
82. The part of instruction code that specifies operation to be performed is [09S01] opcode
83. In IAS computer address part specifies [09S02] Address of operand in memory
84. In indirect addressing mode address part of instruction specifies [09S03]Address of memory location containing address of operand
85. The computer register used to hold instruction code is [09S04] Instruction register
86. A computer uses a memory unit with 256K words of 32 bits each. A binary instruction code is stored in one word of memory.
The instruction has fourparts: an indirect bit, an operation code, a register code part to specify one of 64 indirect 1bit, Opcode 5bits,
Register 8bits, Address 18 bits
87. The instruction that clears start stop flip flop and stops sequence counter from counting is [10M01] HLT
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3. 88. A computer uses a instruction format that has three parts: an indirect part, and operation code, and an address part. One of the
operand is AC and is 022, 083, B8F2, A832, 021
89. Which of the following statement(s) is(are) correct? [10M03]CISC has more complex circuitry than RISC
90. Match the following:
1. Immediate i.) Multiple memory references 2. Direct ii.) No memory reference 3. Indirect iii.) One memory reference [10M04]
b. 1:ii, 2:iii, 3:i
91. A digital computer has a common bus system for 16 registers of 32 bits each. The bus is constructed with multiplexers. How
many selection inputs are 4
92. In the instruction cycle the phase that reads instruction into instruction register from memory is [10S01] Fetch
93. In the instruction cycle the phase that reads effective address from memory location is [10S02] Read effective address
94. The instruction that increments accumulator is [10S03] INC
95. The instruction that clears accumulator is [10S04] CLA
96. The memory reference instruction that denotes operation M[AR]_M[AR]+1, if M[AR]+1=0 then PC_PC+1 is [11D01]ISZ
97. The memory reference instruction that denotes operation M[AR]_PC,PC _AR+1 is [11D02] BSA
98. The memory reference instruction that denotes operation PC _AR is [11M01] BUN
99. The input-output instruction that denotes operation If (FGI =1) then PC_PC+1 is [11M02] SKI
100. The Input-Output Instruction that denotes operation If (FGO =1) then PC_PC+1 is [11M03]SKO
101. The memory reference instruction that denotes operation AC _ AC _ M[AR] is [11S01] AND
102. The memory reference instruction that denotes operation M[AR]_AC is [11S02] STA
103. The memory reference instruction that denotes operation AC _ M[AR] is LDA
104. In the process of information transfer to input register from input device the initial value of control flip-flop FGI is 0(Zero)
105. In the process of information transfer to output register from accumulator the initial value of control flip-flop FGO is 1 (one)
106. The CPU organization in which all operations are performed with an implied accumulator register is [12D01]
Single accumulator organization
107. The CPU organization that does not use an address field for the instructions is [12D02] Stack organization
108. The CPU organization in which all operations are performed with two or three register fields is [12M01] General register
organization
109. In Register Stack the stack pointer register (SP) contains The address of the word that is currently on top of stack
110. The addressing mode in which the address part of the instruction is added to program counter in order to obtain effective
address is [13D01] Relative Address Mode
111. The DATA transfer instruction is [13D02] MOV
112. The addressing mode in which the address part of the instruction gives effective address of operand is [13M01]
Direct Address mode
113. The addressing mode in which the address part of the instruction gives address of effective address of operand is
Indirect Address Mode
114. The DATA manipulation instruction is [13M03] MUL
115. The addressing mode that specifies operands implicitly in the definition of the instruction is [13S01] Implied Mode
116. The addressing mode that specifies operand in the instruction itself is [13S02] Immediate Mode
117. The addressing mode that specifies register operands is [13S03] Register Mode
118. The addressing mode that specifies register containing address of operands is [13S04] Register Indirect Mode
119. The shift instruction is [13S05] ROR
120. The program control instruction that do not change program sequence directly is [14D01] CMP
121. The status bit that is set to 1 if the exclusive-OR of the last two carries is equal to 1 is [14D02] V (Overflow)
122. The program control instruction that sets the status bits by performing logical AND of the two operands is [14M01]TST
123. The program control instruction that sets the status bits by performing a subtraction between two operands is CMP
124. The interrupts that arise from illegal or erroneous use of an instruction or data are [14M03]Software interrupts
125. The program control instruction that is used in conjunction with subroutines is [14S01] RET
126. The program control instruction that does not need an address field is [14S02] SKP
127. The characteristic that is not applicable for RISC architecture is [14S03] Micro program control
128. The characteristic that is not applicable for CISC architecture is [14S04]Fixed Length instruction format
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4. 129. Internal interrupts are also called as [14S05]Traps
130. The most computers based on RISC architecture concept use [15D01] program counter
131. The alternate way of implementing mapping function instead of ROM is [15D02] Programmed Logic Array
132. The next address generator in a micro programmed control unit is referred to as [15M01] Sequencer
133. The process of transferring instruction code bits to an address in control memory where the routine is located is referred as
[15M02] Mapping
134. The address of next microinstruction is stored in [15M03] Control address Register (CAR)
135. The function of control unit in digital computer is [15S01] to initiate sequence of micro operations
136. If the control signals are generated using hardware with conventional logic design techniques then the control unit is said to be
[15S02] Hardwired
137. The memory that is part of control unit is [15S03] Control memory
138. Micro instructions are stored in [15S04] Control memory
139. The register used to store return address of sub routine is [15S05] Sub routine register (SBR)
140. The Pseudo-instruction that specifies first address of a micro program routine is [16D01] ORG
141. The symbolic microinstructions that loads SBR with a new value is [16D02] CALL
142. Most computers based on RISC architecture [16M01] use hardwired control unit
143. The program that translates symbolic micro program into its binary equivalent is [16M02] Assembler
144. A system uses a control memory of 1024 words of 32bits each. The microinstruction has three fields: Condition, Branch
address, and Microperation
fields. If the microoperation field has 16 bits, how many bits are there in the branch address field and the condition field? [16M03]
Branch address has 10 bits and condition field has 6 bits
145. Assume that the control memory is 24 bits wide. The microinstruction has two fields: Address and Microoperation fields. If the
microoperation has 13bits, how many bits are there in the address field and what is the size of the control memory? [16M04]
Address field has 11 bits and the size of the control memory is 2048x24 bits.
146. Arrange the following with the increasing speed of execution. [16S01]
Vertical microinstruction, horizontal microinstruction, hardwired implementation.
147. Arrange the following with the increasing logic of circuitry. [16S02]
Horizontal microinstruction, vertical microinstruction, hardwired implementation
148. Which of the following statement(s) is(are) correct ? [16S03]
The horizontal microinstruction requires more bits than vertical microinstruction.
149. Which of the following statement(s) is(are) correct? [16S04]Variable microinstruction format increases complexity of microprogram
control unit.
150. Match the following:1. microoperation i. Operations executed on data stored in registers
2. microinstruction ii. Sequence of microinstructions3. microprogram iii. Sequence of microoperations [16S05]. 1:i, 2:iii, 3:ii
151. In performing addition and subtraction of signed 2's complement data, if an overflow occurs [17D01]there will an erroneous
results in AC
152. In adding two signed magnitude numbers, parallel adder is implemented with [17M01] full adders
153. Let A(0111) and B(1001) be two BCD numbers. The sum of A and B in BCD is [17M02] 0110 with a carry of 1
154. BCD adder performs sum in binary and converts the binary sum to valid BCD representation whenever the binary sum is
greater than 1001. Invalid binary sum is corrected by [17M03] adding binary 6 (0110) to the binary sum
155. The 9`s complement of a BCD number is obtained by complementing the bits in the coded representation with a correction.
The correction is [17M04]
binary 10 (1010) is added to each complemented digit and the carry is discarded after each addition
156. What will be the quotient and remainder when is divided by in 2's complement binary representation? [17M05]
Quotient 00000; Remainder 10101
157. What will be the quotient and remainder when is divided by in 2's complement representation? [17M06] Quotient 00000;
Remainder 01011
158. The 9's complement of BCD number 0111 is [17S01] 0010
159. Consider register A holding decimal 8760 in BCD. The micro operation dshr A (Decimal shift right register A) produces.
[17S02] 0000 1000 0111 0110
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5. 160. Consider register A holding decimal 8760 in BCD. The micro operation dshl A (Decimal shift left register A) produces.
[17S03] 0111 0110 0000 0000
161. The signed magnitude representation of in BCD is [17S04] 1001 0010 0111 0101
162. The 9's complement representation of in BCD is [17S05]1001 0111 0010 0100
163. The 10's complement representation of in BCD is [17S06] 1001 0111 0010 0101
164. Express the number in IEEE 32-bit floating-point format [18D01] 0 1000 0111 1000 0000 0000 0000 0000 000
165. Express the number -1/32 in IEEE 32-bit floating point format [18D02]1 0111 1010 0000 0000 0000 0000 0000 000
166. Use IEEE single-precision floating-point numbers to compute the (32) X(16) . [18D03] 0 1000 1000 0000 0000 0000 0000
0000 000
167. Use IEEE single-precision floating-point number to compute (32) ÷ (16) . [18D04] 0 0000 0000 1000 0000 0000 0000 0000
000
168. Use IEEE single-precision floating-point numbers to compute (147.5) +(0.25) . [18D05] 0 1000 0110 0010 0111 1000 0000
0000 000
169. To perform multiplication of two signed 2's complemented numbers using Booths algorithm, when the multiplier bit is
identical to the previous multiplier bit [18M01] The partial product does not change
170. Which of the following statement(s) is(are) correct? [18M02]
An overflow can be detected in addition whenever the carry into the sign bit position and the carry out of the sign bit position are not
equal in binary addition
171. Which of the following statement(s) is(are) in correct? [18M03] Binary division operation may never result in a quotient overflow.
172. Which of the following statement(s) is(are) correct? [18M04]
There can be no mantissa overflow after a multiplication operation in floating point representation
173. What is the sum of in BCD? [18M05] 0000 0001 1000
174. In performing floating-point addition, or subtractions , if two exponents are not equal then [19D01] mantissa having smaller
exponent is shifted to the right
175. What value is represented by the following IEEE single precision floating-point number
1 0111 1010 1000 0000 0000 0000 0000 0000 000
[19D02]c. -.0.046875
176. BCD adder performs sum in binary and converts the binary sum to valid BCD representation whenever the binary sum
c=k+z8z4+z8z2
177. BCD adder performs sum in binary and converts the binary sum to valid BCD representation whenever the binary sum
C=K+Z8Z4$+Z8Z2
178. Multiplication of two floating point numbers requires [19M01]Addition of exponents and multiplication of mantissas
179. Division of two floating point numbers requires [19M02]Subtraction of exponents and division of mantissas
180. What is the signed binary product of in binary? [19M03]1101110001
181. Which of the following statement(s) is(are) correct? [19M04] For a fixed format, a larger exponent base gives a greater range of
expressible values at the expense of less precision.
182. In floating point arithmetic operation, for each arithmetic operation [19S01] the results will be normalized
183. In decimal multiplication the sequence counter (SC) is set to [20D01]number digits in multiplier
184. In Decimal Arithmetic operations decimal number are stored in [20M01] BCD form
185. Decimal arithmetic operations use [20M02] BCD adders
186. In decimal arithmetic the symbolic designation A_A+B represents [20S01]add decimal numbers A and B and transfer sum into A
187. In decimal arithmetic the symbolic designation represents [20S02] 9's complement of B
188. In decimal arithmetic the symbolic designation +1 represents [20S03]10's complement of B
189. In decimal arithmetic the symbolic designation dshr A represents [20S04] decimal shift right register A
190. In decimal arithmetic the symbolic designation dshl A represents [20S05] decimal shift left register A
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