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. Suppose that a bus has 16 data lines and requires 4 cycles of 250 nsecs each to transfer data. The bandwidth of this bus would be 2 Megabytes/sec. If the cycle time of the bus was reduced to 125 nsecs and 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. Which of the following is lowest in memory hierarchy?
Correct : B. Secondary memory
16. The addressing mode used in an instruction of the form ADD X Y, is
Correct : C. index
17. 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%
18. In a memory-mapped I/O system, which of the following will not be there?
Correct : A. LDA
19. In a vectored interrupt.
Correct : B. the interrupting source supplies the branch information to the processor through an interrupt vector.
20. Von Neumann architecture is
Correct : A. SISD
21. The circuit used to store one bit of data is known as
Correct : C. Flip Flop
22. Cache memory acts between
Correct : A. CPU and RAM
23. Write Through technique is used in which memory for updating the data
Correct : D. Cache memory
24. Generally Dynamic RAM is used as main memory in a computer system as it
Correct : B. has higher speed
25. In signed-magnitude binary division, if the dividend is (11100) 2 and divisor is (10011) 2 then the result is
Correct : B. (10100) 2
26. Virtual memory consists of
Correct : A. Static RAM
27. In a program using subroutine call instruction, it is necessary
Correct : D. Clear the instruction register
28. A Stack-organised Computer uses instruction of
Correct : C. Zero addressing
29. If the main memory is of 8K bytes and the cache memory is of 2K words. It uses associative mapping. Then each word of cache memory shall be
Correct : C. 16 bits
30. A-Flip Flop can be converted into T-Flip Flop by using additional logic circuit
Correct : D. n TQD =⊕
31. Logic X-OR operation of (4ACO) H & (B53F) H results
Correct : C. FFFF
32. When CPU is executing a Program that is part of the Operating System, it is said to be in
Correct : B. System mode
33. An n-bit microprocessor has
Correct : D. n-bit instruction register
34. Cache memory works on the principle of
Correct : C. Locality of reference
35. The main memory in a Personal Computer (PC) is made of
Correct : D. both (A) and (B) .
36. In computers, subtraction is carried out generally by
Correct : B. 2's complement method
37. PSW is saved in stack when there is a
Correct : A. interrupt recognised
38. The multiplicand register & multiplier register of a hardware circuit implementing booth's algorithm have (11101) & (1100). The result shall be
Correct : A. (812) 10
39. The circuit converting binary data in to decimal is
Correct : D. Code converter
40. A three input NOR gate gives logic high output only when
Correct : D. all input are high
41. n bits in operation code imply that there are ___________ possible distinct operators
Correct : B. 2n
42. _________ register keeps tracks of the instructions stored in program stored in memory.
Correct : C. PC (Program Counter)
43. Memory unit accessed by content is called
Correct : D. Associative Memory
44. ‘Aging registers’ are
Correct : A. Counters which indicate how long ago their associated pages have been referenced.
45. The instruction ‘ORG O’ is a
Correct : B. Pseudo instruction.
46. Translation from symbolic program into Binary is done in
Correct : A. Two passes.
47. A floating point number that has a O in the MSB of mantissa is said to have
Correct : B. Underflow
48. The BSA instruction is
Correct : B. Branch and save return address
49. Logic gates with a set of input and outputs is arrangement of
Correct : A. Combinational circuit
50. MIMD stands for
Correct : A. Multiple instruction multiple data
51. A k-bit field can specify any one of
Correct : B. 2k registers
52. The time interval between adjacent bits is called the
Correct : B. Bit-time
53. A group of bits that tell the computer to perform a specific operation is known as
Correct : A. Instruction code
54. The load instruction is mostly used to designate a transfer from memory to a processor register known as
Correct : A. Accumulator
55. The communication between the components in a microcomputer takes place via
the address and
Correct : B. Data bus
56. An instruction pipeline can be implemented by means of
Correct : B. FIFO buffer
57. Data input command is just the opposite of a
Correct : C. Data output
58. A microprogram sequencer
Correct : A. generates the address of next micro instruction to be executed.
59. . A binary digit is called a
Correct : A. Bit
60. A flip-flop is a binary cell capable of storing information of
Correct : A. One bit
61. The operation executed on data stored in registers is called
Correct : B. Micro-operation
62. MRI indicates
Correct : B. Memory Reference Instruction.
63. Self-contained sequence of instructions that performs a given computational task is
called
Correct : A. Function
64. Microinstructions are stored in control memory groups, with each group specifying a
Correct : A. Routine
65. An interface that provides a method for transferring binary information between
internal storage and external devices is called
Correct : A. I/O interface
66. Status bit is also called
Correct : B. Flag bit
67. An address in main memory is called
Correct : A. Physical address
68. If the value V(x) of the target operand is contained in the address field itself, the
addressing mode is
Correct : B. direct.
69. can be represented in a signed magnitude format and in a 1’s complement format as
Correct : A. 111011 & 100100
70. The instructions which copy information from one location to another either in the
processor’s internal register set or in the external main memory are called
Correct : A. Data transfer instructions.
71. A device/circuit that goes through a predefined sequence of states upon the
application of input pulses is called
Correct : D. counter.
72. The performance of cache memory is frequently measured in terms of a quantity called
Correct : C. Latency ratio.
73. The information available in a state table may be represented graphically in a
Correct : B. state diagram.
74. 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.
75. An interface that provides I/O transfer of data directly to and form the memory unit
and peripheral is termed as
Correct : D. DMA.
76. The 2s compliment form (Use 6 bit word) of the number 1010 is
Correct : B. 110110.
77. A register capable of shifting its binary information either to the right or the left is called a
Correct : C. shift register.
78. What is the content of Stack Pointer (SP)?
Correct : C. Address of the top element of the stack
79. Which of the following interrupt is non maskable
Correct : D. TRAP.
80. Which of the following is a main memory
Correct : C. Cache memory.
81. Which of the following are not a machine instructions
Correct : D. (B) & (C) .
82. In Assembly language programming, minimum number of operands required for an
instruction is/are
Correct : A. Zero.
83. The maximum addressing capacity of a micro processor which uses 16 bit database &
32 bit address base is
Correct : B. 4 GB.
84. The memory unit that communicates directly with the CPU is called the
Correct : A. main memory
85. The average time required to reach a storage location in memory and obtain its
contents is called
Correct : B. Access time.
86. A successive A/D converter is
Correct : C. a medium speed converter.
87. When necessary, the results are transferred from the CPU to main memory by
Correct : C. shift registers.
88. A combinational logic circuit which sends data coming from a single source to two
or more separate destinations is
Correct : D. Demultiplexer.
89. In which addressing mode the operand is given explicitly in the instruction
Correct : B. Immediate .
90. A stack organized computer has
Correct : D. Zero-address Instruction.
91. A Program Counter contains a number 825 and address part of the instruction contains the number 24. The effective address in the relative address mode, when an instruction is read from the memory is
Correct : B. 850.
92. A page fault
Correct : C. Occurs when a program accesses a page not currently in main memory.
93. The load instruction is mostly used to designate a transfer from memory to a
processor register known as____.
Correct : A. Accumulator
94. A group of bits that tell the computer to perform a specific operation is
known as____.
Correct : A. Instruction code
95. The time interval between adjacent bits is called the_____.
Correct : B. Bit-time
96. A k-bit field can specify any one of_____.
Correct : B. 2k registers
97. MIMD stands for _____.
Correct : A. Multiple instruction multiple data
98. Logic gates with a set of input and outputs is arrangement of______.
Correct : A. Computational circuit
99. The average time required to reach a storage location in memory and obtain
its contents is called_____.