McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Master of Science in Computer Science (MSc CS) , Common Topics in Competitive and Entrance exams .
| 1. |
A collection of lines that connects several devices is called .............. |
| A. | bus |
| B. | peripheral connection wires |
| C. | both a and b |
| D. | internal wires |
| Answer» A. bus | |
| 2. |
A complete microcomputer system consist of ........... |
| A. | microprocessor |
| B. | memory |
| C. | peripheral equipment |
| D. | all of the above |
| Answer» D. all of the above | |
| 3. |
PC Program Counter is also called ................... |
| A. | instruction pointer |
| B. | memory pointer |
| C. | data counter |
| D. | file pointer |
| Answer» A. instruction pointer | |
| 4. |
In a single byte how many bits will be there? |
| A. | 8 |
| B. | 16 |
| C. | 4 |
| D. | 32 |
| Answer» A. 8 | |
| 5. |
CPU does not perform the operation .................. |
| A. | data transfer |
| B. | logic operation |
| C. | arithmetic operation |
| D. | all of the above |
| Answer» A. data transfer | |
| 6. |
The access time of memory is ............... the time required for performing any single CPU operation. |
| A. | longer than |
| B. | shorter than |
| C. | negligible than |
| D. | same as |
| Answer» A. longer than | |
| 7. |
Memory address refers to the successive memory words and the machine is called as ............ |
| A. | word addressable |
| B. | byte addressable |
| C. | bit addressable |
| D. | terra byte addressable |
| Answer» A. word addressable | |
| 8. |
A microprogram written as string of 0's and 1's is a ............. |
| A. | symbolic microinstruction |
| B. | binary microinstruction |
| C. | symbolic microinstruction |
| D. | binary micro-program |
| Answer» D. binary micro-program | |
| 9. |
A pipeline is like .................... |
| A. | an automobile assembly line |
| B. | house pipeline |
| C. | both a and b |
| D. | a gas line |
| Answer» A. an automobile assembly line | |
| 10. |
Data hazards occur when ..................... |
| A. | greater performance loss |
| B. | pipeline changes the order of read/write access to operands |
| C. | some functional unit is not fully pipelined |
| D. | machine size is limited |
| Answer» B. pipeline changes the order of read/write access to operands | |
| 11. |
Processors of all computers, whether micro, mini or mainframe must have |
| A. | alu |
| B. | primary storage |
| C. | control unit |
| D. | all of above |
| Answer» D. all of above | |
| 12. |
What is the control unit's function in the CPU? |
| A. | to transfer data to primary storage |
| B. | to store program instruction |
| C. | to perform logic operations |
| D. | to decode program instruction |
| Answer» D. to decode program instruction | |
| 13. |
What is meant by a dedicated computer? |
| A. | which is used by one person only |
| B. | which is assigned to one and only one task |
| C. | which does one kind of software |
| D. | which is meant for application software only |
| Answer» B. which is assigned to one and only one task | |
| 14. |
Which of the following code is used in present day computing was developed by IBM corporation? |
| A. | ascii |
| B. | hollerith code |
| C. | baudot code |
| D. | ebcdic code |
| Answer» D. ebcdic code | |
| 15. |
When a subroutine is called, the address of the instruction following the CALL instructions stored in/on the |
| A. | stack pointer |
| B. | accumulator |
| C. | program counter |
| D. | stack |
| Answer» D. stack | |
| 16. |
A microprogram written as string of 0's and 1's is a |
| A. | symbolic microinstruction |
| B. | binary microinstruction |
| C. | symbolic microprogram |
| D. | binary microprogram |
| Answer» D. binary microprogram | |
| 17. |
Interrupts which are initiated by an instruction are |
| A. | internal |
| B. | external |
| C. | hardware |
| D. | software |
| Answer» B. external | |
| 18. |
Memory access in RISC architecture is limited to instructions |
| A. | call and ret |
| B. | push and pop |
| C. | sta and lda |
| D. | mov and jmp |
| Answer» C. sta and lda | |
| 19. |
From where interrupts are generated? |
| A. | central processing unit |
| B. | memory chips |
| C. | registers |
| D. | i/o devices |
| Answer» D. i/o devices | |
| 20. |
The output of a gate is low when at least one of its input is low . It is true for |
| A. | and gate |
| B. | or gate |
| C. | nand gate |
| D. | nor gate |
| Answer» A. and gate | |
| 21. |
Which one of the following is most suitable to make a parity checker |
| A. | and gate |
| B. | or gate |
| C. | exclusive- or gate |
| D. | none of the above |
| Answer» C. exclusive- or gate | |
| 22. |
What is the minimum number of flip-flops required in a counter to count 100 pulses? |
| A. | five |
| B. | seven |
| C. | ten |
| D. | hundred |
| Answer» B. seven | |
| 23. |
For a RS flip-flop constructed with NAND gates and input R=1 and s=1 the state is |
| A. | memory state |
| B. | set state |
| C. | reset state |
| D. | unused state |
| Answer» D. unused state | |
| 24. |
The advantage of RISC processor over CISC processor is that |
| A. | the hardware architecture is simpler |
| B. | an instruction can be executed in one cycle |
| C. | less number of registers accommodate in chip |
| D. | parallel execution capabilities |
| Answer» B. an instruction can be executed in one cycle | |
| 25. |
Which of the following is true about interrupts? |
| A. | they are generated when memory cycles are stolen |
| B. | they are used in place of data channels |
| C. | they can be generated by arithmetic operation |
| D. | they can indicate completion of an i/o operation |
| Answer» A. they are generated when memory cycles are stolen | |
| 26. |
Te devices connected to a microprocessor can use the data bus: |
| A. | all the time |
| B. | at regular interval of time |
| C. | only when it’s sending or receiving data |
| D. | when the microprocessor is reset |
| Answer» C. only when it’s sending or receiving data | |
| 27. |
Intel 8080 microprocessor has an instruction set of 91 instruction. The opcode to implement this instruction set should be at least |
| A. | 3 bit long |
| B. | 5 bit long |
| C. | 7 bit long |
| D. | 9 bit long |
| Answer» C. 7 bit long | |
| 28. |
Dynamic RAMs are best suited to |
| A. | slow system |
| B. | large system |
| C. | one bit system |
| D. | none of the above |
| Answer» A. slow system | |
| 29. |
Intel Pentium CPU is a |
| A. | risc based |
| B. | cisc based |
| C. | both of the above |
| D. | none of the above |
| Answer» A. risc based | |
| 30. |
A modem is used to link up two computers via |
| A. | telephone line |
| B. | dedicated line |
| C. | both of the above |
| D. | none of the above |
| Answer» C. both of the above | |
| 31. |
The maximum integer which can be stored on a 8 bit accumulator is |
| A. | 112 |
| B. | 200 |
| C. | 255 |
| D. | 224 |
| Answer» C. 255 | |
| 32. |
In a system with a 16 bit address bus, what is the maximum number of 1K byte memory devices it could contain |
| A. | 16 |
| B. | 64 |
| C. | 256 |
| D. | 65536 |
| Answer» C. 256 | |
| 33. |
Which of the following memories in a computer is volatile? |
| A. | ram |
| B. | rom |
| C. | eprom |
| D. | all |
| Answer» A. ram | |
| 34. |
A peripheral is |
| A. | any drives installed in the computer |
| B. | tapedrive connected to a computer |
| C. | any physical device connected to the computer |
| D. | none of above |
| Answer» C. any physical device connected to the computer | |
| 35. |
How many bits do you think will be adequate to encode individual character in Devnagari script |
| A. | 12 |
| B. | 16 |
| C. | 64 |
| D. | 10 |
| Answer» D. 10 | |
| 36. |
Which of the following bus is used to transfer data from main memory to peripheral device? |
| A. | dma bus |
| B. | output bus |
| C. | data bus |
| D. | all of the above |
| Answer» C. data bus | |
| 37. |
To provide increased memory capacity for operating system, the |
| A. | virtual memory is created |
| B. | cache memory is increased |
| C. | memory for os is reserved |
| D. | additional memory is installed |
| Answer» A. virtual memory is created | |
| 38. |
CD -RAW is |
| A. | input device only |
| B. | output device only |
| C. | both of the above |
| D. | none of the above |
| Answer» B. output device only | |
| 39. |
Which of the following require large computer memory? |
| A. | imaging |
| B. | graphics |
| C. | voice |
| D. | all of the above |
| Answer» D. all of the above | |
| 40. |
Which major development led to the production of microcomputers? |
| A. | magnetic disks |
| B. | floppy disks |
| C. | logic gates |
| D. | integrated circuits |
| Answer» D. integrated circuits | |
| 41. |
In immediate addressing the operand is placed |
| A. | in the cpu register |
| B. | after opcode in the instruction |
| C. | in the memory |
| D. | in the stack |
| Answer» B. after opcode in the instruction | |
| 42. |
The 16- bit registers in 8085 is |
| A. | general purpose register |
| B. | accumulator |
| C. | stack pointer and program counter |
| D. | all of the above |
| Answer» C. stack pointer and program counter | |
| 43. |
Instruction pipelining has minimum stages |
| A. | 4 |
| B. | 2 |
| C. | 3 |
| D. | 6 |
| Answer» B. 2 | |
| 44. |
Systems that do not have parallel processing capabilities are |
| A. | sisd |
| B. | simd |
| C. | mimd |
| D. | all of the above |
| Answer» A. sisd | |
| 45. |
The word size of the microprocessor refers to |
| A. | the amount of a information that can be stored in a byte |
| B. | the amount of a information that can be stored in a cycle |
| C. | the number of machine operations performed in a second |
| D. | the maximum length of an english word that can be input to a computer |
| Answer» B. the amount of a information that can be stored in a cycle | |
| 46. |
How many address lines are needed to address each memory location in a 2048X 4 memory chip? |
| A. | 10 |
| B. | 11 |
| C. | 8 |
| D. | 12 |
| Answer» B. 11 | |
| 47. |
Pipelining strategy is called implement |
| A. | instruction execution |
| B. | instruction prefetch |
| C. | instruction decoding |
| D. | instruction manipulation |
| Answer» B. instruction prefetch | |
| 48. |
The concept of pipelining is most effective in improving performance if the tasks being performed in different stages : |
| A. | require different amount of time |
| B. | require about the same amount of time |
| C. | require different amount of time with time difference between any two tasks being same |
| D. | require different amount with time difference between any two tasks being different |
| Answer» B. require about the same amount of time | |
| 49. |
Which Algorithm is better choice for pipelining? |
| A. | small algorithm |
| B. | hash algorithm |
| C. | merge-sort algorithm |
| D. | quick-sort algorithm |
| Answer» C. merge-sort algorithm | |
| 50. |
The expression 'delayed load' is used in context of |
| A. | processor-printer communication |
| B. | memory-monitor communication |
| C. | pipelining |
| D. | none of the above |
| Answer» C. pipelining | |
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