1. In Reverse Polish notation, expression A*B+C*D is written as
Correct : A. ab*cd*+
2. SIMD represents an organization that ______________.
Correct : C. includes many processing units under the supervision of a common control unit
3. Floating point representation is used to store
Correct : C. real integers
4. the number of cycles required for transfer stayed the same what would the bandwidth of the bus?
Correct : D. 2 megabytes/sec
5. Assembly language
Correct : A. uses alphabetic codes in place of binary numbers used in machine language
6. In computers, subtraction is generally carried out by
Correct : D. 2’s complement
7. The amount of time required to read a block of data from a disk into memory is composed of seek time, rotational latency, and transfer time. Rotational latency refers to
Correct : A. the time its takes for the platter to make a full rotation
8. What characteristic of RAM memory makes it not suitable for permanent storage?
Correct : C. it is volatile
9. Computers use addressing mode techniques for _____________________.
Correct : D. all the above
10. The circuit used to store one bit of data is known as
Correct : D. flip flop
11. (2FAOC) 16 is equivalent to
Correct : B. (001011111010 0000 1100) 2
12. The average time required to reach a storage location in memory and obtain its contents is called the
Correct : C. access time
13. Which of the following is not a weighted code?
Correct : B. excess 3-cod
14. The idea of cache memory is based
Correct : A. on the property of locality of reference
15. The addressing mode used in an instruction of the form ADD X Y, is
Correct : C. index
16. If memory access takes 20 ns with cache and 110 ns with out it, then the ratio (cache uses a 10 ns memory) is
Correct : B. 90%
17. In a memory-mapped I/O system, which of the following will not be there?
Correct : A. lda
18. In a vectored interrupt.
Correct : B. the interrupting source supplies the branch information to the processor through an interrupt vector.
19. Von Neumann architecture is
Correct : A. sisd
20. The circuit used to store one bit of data is known as
Correct : C. flip flop
21. Cache memory acts between
Correct : A. cpu and ram
22. Write Through technique is used in which memory for updating the data
Correct : D. cache memory
23. Generally Dynamic RAM is used as main memory in a computer system as it
Correct : B. has higher speed
24. In signed-magnitude binary division, if the dividend is (11100) 2 and divisor is (10011) 2 then the result is
Correct : B. (10100) 2
25. Virtual memory consists of
Correct : A. static ram
26. In a program using subroutine call instruction, it is necessary
Correct : D. clear the instruction register
27. A Stack-organised Computer uses instruction of
Correct : C. zero addressing
28. Then each word of cache memory shall be
Correct : C. 16 bits
29. A-Flip Flop can be converted into T-Flip Flop by using additional logic circuit
Correct : D. n tqd =?
30. Logic X-OR operation of (4ACO) H & (B53F) H results
Correct : C. ffff
31. When CPU is executing a Program that is part of the Operating System, it is said to be in
Correct : B. system mode
32. An n-bit microprocessor has
Correct : D. n-bit instruction register
33. Cache memory works on the principle of
Correct : C. locality of reference
34. The main memory in a Personal Computer (PC) is made of
Correct : D. both (a) and (b) .
35. In computers, subtraction is carried out generally by
Correct : B. 2’s complement method
36. PSW is saved in stack when there is a
Correct : A. interrupt recognised
37. The multiplicand register & multiplier register of a hardware circuit implementing booth’s algorithm have (11101) & (1100). The result shall be
Correct : A. (812) 10
38. The circuit converting binary data in to decimal is
Correct : D. code converter
39. A three input NOR gate gives logic high output only when
Correct : D. all input are high
40. n bits in operation code imply that there are ___________ possible distinct operators
Correct : B. 2n
41. _________ register keeps tracks of the instructions stored in program stored in memory.
Correct : C. pc (program counter)
42. Memory unit accessed by content is called
Correct : D. associative memory
43. ‘Aging registers’ are
Correct : A. counters which indicate how long ago their associated pages have been referenced.
44. The instruction ‘ORG O’ is a
Correct : B. pseudo instruction.
45. Translation from symbolic program into Binary is done in
Correct : A. two passes.
46. A floating point number that has a O in the MSB of mantissa is said to have
Correct : B. underflow
47. The BSA instruction is
Correct : B. branch and save return address
48. Logic gates with a set of input and outputs is arrangement of
Correct : A. combinational circuit
49. MIMD stands for
Correct : A. multiple instruction multiple data
50. A k-bit field can specify any one of
Correct : B. 2k registers
51. The time interval between adjacent bits is called the
Correct : B. bit-time
52. A group of bits that tell the computer to perform a specific operation is known as
Correct : A. instruction code
53. The load instruction is mostly used to designate a transfer from memory to a processor register known as
Correct : A. accumulator
54. The communication between the components in a microcomputer takes place via the address and
Correct : B. data bus
55. An instruction pipeline can be implemented by means of
Correct : B. fifo buffer
56. Data input command is just the opposite of a
Correct : C. data output
57. A microprogram sequencer
Correct : A. generates the address of next micro instruction to be executed.
58. . A binary digit is called a
Correct : A. bit
59. A flip-flop is a binary cell capable of storing information of
Correct : A. one bit
60. The operation executed on data stored in registers is called
Correct : B. micro-operation
61. MRI indicates
Correct : B. memory reference instruction.
62. Self-contained sequence of instructions that performs a given computational task is called
Correct : A. function
63. Microinstructions are stored in control memory groups, with each group specifying a
Correct : A. routine
64. An interface that provides a method for transferring binary information between internal storage and external devices is called
Correct : A. i/o interface
65. Status bit is also called
Correct : B. flag bit
66. An address in main memory is called
Correct : A. physical address
67. If the value V(x) of the target operand is contained in the address field itself, the addressing mode is
Correct : B. direct.
68. can be represented in a signed magnitude format and in a 1’s complement format as
Correct : A. 111011 & 100100
69. in the external main memory are called
Correct : A. data transfer instructions.
70. A device/circuit that goes through a predefined sequence of states upon the application of input pulses is called
Correct : D. counter.
71. The performance of cache memory is frequently measured in terms of a quantity called
Correct : C. latency ratio.
72. The information available in a state table may be represented graphically in a
Correct : B. state diagram.
73. Content of the program counter is added to the address part of the instruction in order to obtain the effective address is called.
Correct : A. relative address mode.
74. An interface that provides I/O transfer of data directly to and form the memory unit and peripheral is termed as
Correct : D. dma.
75. The 2s compliment form (Use 6 bit word) of the number 1010 is
Correct : B. 110110.
76. A register capable of shifting its binary information either to the right or the left is called a
Correct : C. shift register.
77. What is the content of Stack Pointer (SP)?
Correct : C. address of the top element of the stack
78. Which of the following interrupt is non maskable
Correct : D. trap.
79. Which of the following is a main memory
Correct : C. cache memory.
80. Which of the following are not a machine instructions
Correct : D. (b) & (c) .
81. In Assembly language programming, minimum number of operands required for an instruction is/are
Correct : A. zero.
82. The maximum addressing capacity of a micro processor which uses 16 bit database & 32 bit address base is
Correct : B. 4 gb.
83. The memory unit that communicates directly with the CPU is called the
Correct : A. main memory
84. The average time required to reach a storage location in memory and obtain its contents is called
Correct : B. access time.
85. A successive A/D converter is
Correct : C. a medium speed converter.
86. When necessary, the results are transferred from the CPU to main memory by
Correct : C. shift registers.
87. A combinational logic circuit which sends data coming from a single source to two or more separate destinations is
Correct : D. demultiplexer.
88. In which addressing mode the operand is given explicitly in the instruction
Correct : B. immediate .
89. A stack organized computer has
Correct : D. zero-address instruction.
90. The effective address in the relative address mode, when an instruction is read from the memory is
Correct : B. 850.
91. A page fault
Correct : C. occurs when a program accesses a page not currently in main memory.
92. The load instruction is mostly used to designate a transfer from memory to a processor register known as____.
Correct : A. . accumulator
93. A group of bits that tell the computer to perform a specific operation is known as____.
Correct : A. . instruction code
94. The time interval between adjacent bits is called the_____.
Correct : B. . bit-time
95. A k-bit field can specify any one of_____.
Correct : B. . 2k registers
96. MIMD stands for _____.
Correct : A. . multiple instruction multiple data
97. Logic gates with a set of input and outputs is arrangement of______.
Correct : A. . computational circuit
98. The average time required to reach a storage location in memory and obtain its contents is called_____.
Correct : B. . access time.
99. The BSA instruction is______.
Correct : B. . branch and save return address
100. A floating point number that has a O in the MSB of mantissa is said to have_____.