McqMate
1. |
In Reverse Polish notation, expression A*B+C*D is written as |
A. | ab*cd*+ |
B. | a*bcd*+ |
C. | ab*cd+* |
D. | a*b*cd+ |
Answer» A. ab*cd*+ |
2. |
SIMD represents an organization that ______________. |
A. | refers to a computer system capable of processing several programs at the same time. |
B. | represents organization of single computer containing a control unit, processor unit and a memory unit. |
C. | includes many processing units under the supervision of a common control unit |
D. | none of the above. |
Answer» C. includes many processing units under the supervision of a common control unit |
3. |
Floating point representation is used to store |
A. | boolean values |
B. | whole numbers |
C. | real integers |
D. | integers |
Answer» C. real integers |
4. |
the number of cycles required for transfer stayed the same what would the bandwidth of the bus? |
A. | 1 megabyte/sec |
B. | 4 megabytes/sec |
C. | 8 megabytes/sec |
D. | 2 megabytes/sec |
Answer» D. 2 megabytes/sec |
5. |
Assembly language |
A. | uses alphabetic codes in place of binary numbers used in machine language |
B. | is the easiest language to write programs |
C. | need not be translated into machine language |
D. | none of these |
Answer» A. uses alphabetic codes in place of binary numbers used in machine language |
6. |
In computers, subtraction is generally carried out by |
A. | 9’s complement |
B. | 10’s complement |
C. | 1’s complement |
D. | 2’s complement |
Answer» 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 |
A. | the time its takes for the platter to make a full rotation |
B. | the time it takes for the read-write head to move into position over the appropriate track |
C. | the time it takes for the platter to rotate the correct sector under the head |
D. | none of the above |
Answer» 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? |
A. | too slow |
B. | unreliable |
C. | it is volatile |
D. | too bulky |
Answer» C. it is volatile |
9. |
Computers use addressing mode techniques for _____________________. |
A. | giving programming versatility to the user by providing facilities as pointers to memory counters for loop control |
B. | to reduce no. of bits in the field of instruction |
C. | specifying rules for modifying or interpreting address field of the instruction |
D. | all the above |
Answer» D. all the above |
10. |
The circuit used to store one bit of data is known as |
A. | register |
B. | encoder |
C. | decoder |
D. | flip flop |
Answer» D. flip flop |
11. |
(2FAOC) 16 is equivalent to |
A. | (195 084) 10 |
B. | (001011111010 0000 1100) 2 |
C. | both (a) and (b) |
D. | none of these |
Answer» B. (001011111010 0000 1100) 2 |
12. |
The average time required to reach a storage location in memory and obtain its contents is called the |
A. | seek time |
B. | turnaround time |
C. | access time |
D. | transfer time |
Answer» C. access time |
13. |
Which of the following is not a weighted code? |
A. | decimal number system |
B. | excess 3-cod |
C. | binary number system |
D. | none of these |
Answer» B. excess 3-cod |
14. |
The idea of cache memory is based |
A. | on the property of locality of reference |
B. | on the heuristic 90-10 rule |
C. | on the fact that references generally tend to cluster |
D. | all of the above |
Answer» A. on the property of locality of reference |
15. |
The addressing mode used in an instruction of the form ADD X Y, is |
A. | absolute |
B. | indirect |
C. | index |
D. | none of these |
Answer» 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 |
A. | 93% |
B. | 90% |
C. | 88% |
D. | 87% |
Answer» B. 90% |
17. |
In a memory-mapped I/O system, which of the following will not be there? |
A. | lda |
B. | in |
C. | add |
D. | out |
Answer» A. lda |
18. |
In a vectored interrupt. |
A. | the branch address is assigned to a fixed location in memory. |
B. | the interrupting source supplies the branch information to the processor through an interrupt vector. |
C. | the branch address is obtained from a register in the processor |
D. | none of the above |
Answer» B. the interrupting source supplies the branch information to the processor through an interrupt vector. |
19. |
Von Neumann architecture is |
A. | sisd |
B. | simd |
C. | mimd |
D. | misd |
Answer» A. sisd |
20. |
The circuit used to store one bit of data is known as |
A. | encoder |
B. | or gate |
C. | flip flop |
D. | decoder |
Answer» C. flip flop |
21. |
Cache memory acts between |
A. | cpu and ram |
B. | ram and rom |
C. | cpu and hard disk |
D. | none of these |
Answer» A. cpu and ram |
22. |
Write Through technique is used in which memory for updating the data |
A. | virtual memory |
B. | main memory |
C. | auxiliary memory |
D. | cache memory |
Answer» D. cache memory |
23. |
Generally Dynamic RAM is used as main memory in a computer system as it |
A. | consumes less power |
B. | has higher speed |
C. | has lower cell density |
D. | needs refreshing circuitary |
Answer» 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 |
A. | (00100) 2 |
B. | (10100) 2 |
C. | (11001) 2 |
D. | (01100) 2 |
Answer» B. (10100) 2 |
25. |
Virtual memory consists of |
A. | static ram |
B. | dynamic ram |
C. | magnetic memory |
D. | none of these |
Answer» A. static ram |
26. |
In a program using subroutine call instruction, it is necessary |
A. | initialise program counter |
B. | clear the accumulator |
C. | reset the microprocessor |
D. | clear the instruction register |
Answer» D. clear the instruction register |
27. |
A Stack-organised Computer uses instruction of |
A. | indirect addressing |
B. | two-addressing |
C. | zero addressing |
D. | index addressing |
Answer» C. zero addressing |
28. |
Then each word of cache memory shall be |
A. | 11 bits |
B. | 21 bits |
C. | 16 bits |
D. | 20 bits |
Answer» C. 16 bits |
29. |
A-Flip Flop can be converted into T-Flip Flop by using additional logic circuit |
A. | n tqd =• |
B. | t d = |
C. | d = t . q n |
D. | n tqd =? |
Answer» D. n tqd =? |
30. |
Logic X-OR operation of (4ACO) H & (B53F) H results |
A. | aacb |
B. | 0000 |
C. | ffff |
D. | abcd |
Answer» C. ffff |
31. |
When CPU is executing a Program that is part of the Operating System, it is said to be in |
A. | interrupt mode |
B. | system mode |
C. | half mode |
D. | simplex mode |
Answer» B. system mode |
32. |
An n-bit microprocessor has |
A. | n-bit program counter |
B. | n-bit address register |
C. | n-bit alu |
D. | n-bit instruction register |
Answer» D. n-bit instruction register |
33. |
Cache memory works on the principle of |
A. | locality of data |
B. | locality of memory |
C. | locality of reference |
D. | locality of reference & memory |
Answer» C. locality of reference |
34. |
The main memory in a Personal Computer (PC) is made of |
A. | cache memory. |
B. | static ram |
C. | dynamic ram |
D. | both (a) and (b) . |
Answer» D. both (a) and (b) . |
35. |
In computers, subtraction is carried out generally by |
A. | 1’s complement method |
B. | 2’s complement method |
C. | signed magnitude method |
D. | bcd subtraction method |
Answer» B. 2’s complement method |
36. |
PSW is saved in stack when there is a |
A. | interrupt recognised |
B. | execution of rst instruction |
C. | execution of call instruction |
D. | all of these |
Answer» A. interrupt recognised |
37. |
The multiplicand register & multiplier register of a hardware circuit implementing booth’s algorithm have (11101) & (1100). The result shall be |
A. | (812) 10 |
B. | (-12) 10 |
C. | (12) 10 |
D. | (-812) 10 |
Answer» A. (812) 10 |
38. |
The circuit converting binary data in to decimal is |
A. | encoder |
B. | multiplexer |
C. | decoder |
D. | code converter |
Answer» D. code converter |
39. |
A three input NOR gate gives logic high output only when |
A. | one input is high |
B. | one input is low |
C. | two input are low |
D. | all input are high |
Answer» D. all input are high |
40. |
n bits in operation code imply that there are ___________ possible distinct operators |
A. | 2n |
B. | 2n |
C. | n/2 |
D. | n2 |
Answer» B. 2n |
41. |
_________ register keeps tracks of the instructions stored in program stored in memory. |
A. | ar (address register) |
B. | xr (index register) |
C. | pc (program counter) |
D. | ac (accumulator) |
Answer» C. pc (program counter) |
42. |
Memory unit accessed by content is called |
A. | read only memory |
B. | programmable memory |
C. | virtual memory |
D. | associative memory |
Answer» D. associative memory |
43. |
‘Aging registers’ are |
A. | counters which indicate how long ago their associated pages have been referenced. |
B. | registers which keep track of when the program was last accessed. |
C. | counters to keep track of last accessed instruction. |
D. | counters to keep track of the latest data structures referred. |
Answer» A. counters which indicate how long ago their associated pages have been referenced. |
44. |
The instruction ‘ORG O’ is a |
A. | machine instruction. |
B. | pseudo instruction. |
C. | high level instruction. |
D. | memory instruction. |
Answer» B. pseudo instruction. |
45. |
Translation from symbolic program into Binary is done in |
A. | two passes. |
B. | directly |
C. | three passes. |
D. | four passes. |
Answer» A. two passes. |
46. |
A floating point number that has a O in the MSB of mantissa is said to have |
A. | overflow |
B. | underflow |
C. | important number |
D. | undefined |
Answer» B. underflow |
47. |
The BSA instruction is |
A. | branch and store accumulator |
B. | branch and save return address |
C. | branch and shift address |
D. | branch and show accumulator |
Answer» B. branch and save return address |
48. |
Logic gates with a set of input and outputs is arrangement of |
A. | combinational circuit |
B. | logic circuit |
C. | design circuits |
D. | register |
Answer» A. combinational circuit |
49. |
MIMD stands for |
A. | multiple instruction multiple data |
B. | multiple instruction memory data |
C. | memory instruction multiple data |
D. | multiple information memory data |
Answer» A. multiple instruction multiple data |
50. |
A k-bit field can specify any one of |
A. | 3k registers |
B. | 2k registers |
C. | k2 registers |
D. | k3 registers |
Answer» B. 2k registers |
51. |
The time interval between adjacent bits is called the |
A. | word-time |
B. | bit-time |
C. | turn around time |
D. | slice time |
Answer» B. bit-time |
52. |
A group of bits that tell the computer to perform a specific operation is known as |
A. | instruction code |
B. | micro-operation |
C. | accumulator |
D. | register |
Answer» A. instruction code |
53. |
The load instruction is mostly used to designate a transfer from memory to a processor register known as |
A. | accumulator |
B. | instruction register |
C. | program counter |
D. | memory address register |
Answer» A. accumulator |
54. |
The communication between the components in a microcomputer takes place via the address and |
A. | i/o bus |
B. | data bus |
C. | address bus |
D. | control lines |
Answer» B. data bus |
55. |
An instruction pipeline can be implemented by means of |
A. | lifo buffer |
B. | fifo buffer |
C. | stack |
D. | none of the above |
Answer» B. fifo buffer |
56. |
Data input command is just the opposite of a |
A. | test command |
B. | control command |
C. | data output |
D. | data channel |
Answer» C. data output |
57. |
A microprogram sequencer |
A. | generates the address of next micro instruction to be executed. |
B. | generates the control signals to execute a microinstruction. |
C. | sequentially averages all microinstructions in the control memory. |
D. | enables the efficient handling of a micro program subroutine. |
Answer» A. generates the address of next micro instruction to be executed. |
58. |
. A binary digit is called a |
A. | bit |
B. | byte |
C. | number |
D. | character |
Answer» A. bit |
59. |
A flip-flop is a binary cell capable of storing information of |
A. | one bit |
B. | byte |
C. | zero bit |
D. | eight bit |
Answer» A. one bit |
60. |
The operation executed on data stored in registers is called |
A. | macro-operation |
B. | micro-operation |
C. | bit-operation |
D. | byte-operation |
Answer» B. micro-operation |
61. |
MRI indicates |
A. | memory reference information. |
B. | memory reference instruction. |
C. | memory registers instruction. |
D. | memory register information |
Answer» B. memory reference instruction. |
62. |
Self-contained sequence of instructions that performs a given computational task is called |
A. | function |
B. | procedure |
C. | subroutine |
D. | routine |
Answer» A. function |
63. |
Microinstructions are stored in control memory groups, with each group specifying a |
A. | routine |
B. | subroutine |
C. | vector |
D. | address |
Answer» A. routine |
64. |
An interface that provides a method for transferring binary information between internal storage and external devices is called |
A. | i/o interface |
B. | input interface |
C. | output interface |
D. | i/o bus |
Answer» A. i/o interface |
65. |
Status bit is also called |
A. | binary bit |
B. | flag bit |
C. | signed bit |
D. | unsigned bit |
Answer» B. flag bit |
66. |
An address in main memory is called |
A. | physical address |
B. | logical address |
C. | memory address |
D. | word address |
Answer» A. physical address |
67. |
If the value V(x) of the target operand is contained in the address field itself, the addressing mode is |
A. | immediate. |
B. | direct. |
C. | indirect. |
D. | implied. |
Answer» B. direct. |
68. |
can be represented in a signed magnitude format and in a 1’s complement format as |
A. | 111011 & 100100 |
B. | 100100 & 111011 |
C. | 011011 & 100100 |
D. | 100100 & 011011 |
Answer» A. 111011 & 100100 |
69. |
in the external main memory are called |
A. | data transfer instructions. |
B. | program control instructions. |
C. | input-output instructions. |
D. | logical instructions. |
Answer» A. data transfer instructions. |
70. |
A device/circuit that goes through a predefined sequence of states upon the application of input pulses is called |
A. | register |
B. | flip-flop |
C. | transistor. |
D. | counter. |
Answer» D. counter. |
71. |
The performance of cache memory is frequently measured in terms of a quantity called |
A. | miss ratio. |
B. | hit ratio. |
C. | latency ratio. |
D. | read ratio. |
Answer» C. latency ratio. |
72. |
The information available in a state table may be represented graphically in a |
A. | simple diagram. |
B. | state diagram. |
C. | complex diagram. |
D. | data flow diagram. |
Answer» 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. |
A. | relative address mode. |
B. | index addressing mode. |
C. | register mode. |
D. | implied mode. |
Answer» 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 |
A. | dda. |
B. | serial interface. |
C. | br. |
D. | dma. |
Answer» D. dma. |
75. |
The 2s compliment form (Use 6 bit word) of the number 1010 is |
A. | 111100. |
B. | 110110. |
C. | 110111. |
D. | 1011. |
Answer» B. 110110. |
76. |
A register capable of shifting its binary information either to the right or the left is called a |
A. | parallel register. |
B. | serial register. |
C. | shift register. |
D. | storage register. |
Answer» C. shift register. |
77. |
What is the content of Stack Pointer (SP)? |
A. | address of the current instruction |
B. | address of the next instruction |
C. | address of the top element of the stack |
D. | size of the stack. |
Answer» C. address of the top element of the stack |
78. |
Which of the following interrupt is non maskable |
A. | intr. |
B. | rst 7.5. |
C. | rst 6.5. |
D. | trap. |
Answer» D. trap. |
79. |
Which of the following is a main memory |
A. | secondary memory. |
B. | auxiliary memory. |
C. | cache memory. |
D. | virtual memory. |
Answer» C. cache memory. |
80. |
Which of the following are not a machine instructions |
A. | mov. |
B. | org. |
C. | end. |
D. | (b) & (c) . |
Answer» D. (b) & (c) . |
81. |
In Assembly language programming, minimum number of operands required for an instruction is/are |
A. | zero. |
B. | one. |
C. | two. |
D. | both (b) & (c) . |
Answer» A. zero. |
82. |
The maximum addressing capacity of a micro processor which uses 16 bit database & 32 bit address base is |
A. | 64 k. |
B. | 4 gb. |
C. | both (a) & (b) . |
D. | none of these. |
Answer» B. 4 gb. |
83. |
The memory unit that communicates directly with the CPU is called the |
A. | main memory |
B. | secondary memory |
C. | shared memory |
D. | auxiliary memory. |
Answer» A. main memory |
84. |
The average time required to reach a storage location in memory and obtain its contents is called |
A. | latency time. |
B. | access time. |
C. | turnaround time. |
D. | response time. |
Answer» B. access time. |
85. |
A successive A/D converter is |
A. | a high-speed converter. |
B. | a low speed converter. |
C. | a medium speed converter. |
D. | none of these. |
Answer» C. a medium speed converter. |
86. |
When necessary, the results are transferred from the CPU to main memory by |
A. | i/o devices. |
B. | cpu. |
C. | shift registers. |
D. | none of these. |
Answer» C. shift registers. |
87. |
A combinational logic circuit which sends data coming from a single source to two or more separate destinations is |
A. | decoder. |
B. | encoder. |
C. | multiplexer. |
D. | demultiplexer. |
Answer» D. demultiplexer. |
88. |
In which addressing mode the operand is given explicitly in the instruction |
A. | absolute. |
B. | immediate . |
C. | indirect. |
D. | direct. |
Answer» B. immediate . |
89. |
A stack organized computer has |
A. | three-address instruction. |
B. | two-address instruction. |
C. | one-address instruction. |
D. | zero-address instruction. |
Answer» D. zero-address instruction. |
90. |
The effective address in the relative address mode, when an instruction is read from the memory is |
A. | 849. |
B. | 850. |
C. | 801. |
D. | 802. |
Answer» B. 850. |
91. |
A page fault |
A. | occurs when there is an error in a specific page. |
B. | occurs when a program accesses a page of main memory. |
C. | occurs when a program accesses a page not currently in main memory. |
D. | occurs when a program accesses a page belonging to another program. |
Answer» 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____. |
A. | . accumulator |
B. | . instruction register |
C. | . program counter |
D. | . memory address register |
Answer» A. . accumulator |
93. |
A group of bits that tell the computer to perform a specific operation is known as____. |
A. | . instruction code |
B. | . micro-operation |
C. | . accumulator |
D. | . register |
Answer» A. . instruction code |
94. |
The time interval between adjacent bits is called the_____. |
A. | . word-time |
B. | . bit-time |
C. | . turn around time |
D. | . slice time |
Answer» B. . bit-time |
95. |
A k-bit field can specify any one of_____. |
A. | . 3k registers |
B. | . 2k registers |
C. | . k2 registers |
D. | . k3 registers |
Answer» B. . 2k registers |
96. |
MIMD stands for _____. |
A. | . multiple instruction multiple data |
B. | . multiple instruction memory data |
C. | . memory instruction multiple data |
D. | . multiple information memory data |
Answer» A. . multiple instruction multiple data |
97. |
Logic gates with a set of input and outputs is arrangement of______. |
A. | . computational circuit |
B. | . logic circuit |
C. | . design circuits |
D. | . register |
Answer» A. . computational circuit |
98. |
The average time required to reach a storage location in memory and obtain its contents is called_____. |
A. | . latency time. |
B. | . access time. |
C. | . turnaround time. |
D. | . response time. |
Answer» B. . access time. |
99. |
The BSA instruction is______. |
A. | . branch and store accumulator |
B. | . branch and save return address |
C. | . branch and shift address |
D. | . branch and show accumulator |
Answer» B. . branch and save return address |
100. |
A floating point number that has a O in the MSB of mantissa is said to have_____. |
A. | . overflow |
B. | . underflow |
C. | . important number |
D. | . undefined |
Answer» B. . underflow |
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