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Computer Organization & Architecture MCQ [ Set - 17 ] | Computer Organization and Architecture Mcq for Gate

 

Computer Organization and Architecture Mcq for Gate


Table of Content (toc)


1. In half subtractor borrow is obtained by (for inputs A & B)

    AB
    A’B
    A’B’
ANSWER= (B) None of these

 

2.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 ______.

    the time its takes for the platter to make a full rotation
    the time it takes for the read-write head to move into position over the appropriate track
    the time it takes for the platter to rotate the correct sector under the head

ANSWER= (A) the time its takes for the platter to make a full rotation

 

3. CP/M

     Was initially designed to be used by non-programmers
    Became the standard programming language for personal computers
    Is used to control a keyboard, CRT screen, and disks
ANSWER= (C) Is used to control a keyboard, CRT screen, and disks

 

4. The access time is maximum in

    Cache memory
    Register
    RAM

ANSWER= (D) Hard disk drive

 

5. The transmission on the asynchronous BUS is also called            

    Switch mode transmission
    Variable transfer
    Bulk transfer

ANSWER= (D) Hand-Shake transmission

 

6. 1. ___ is systems with multiple CPUs, which are capable of independently executing different tasks in parallel.

    2. In this category every processor and memory module has a similar access time.

    Multiprocessor, UMA
    UMA, Microprocessor
    Microprocessor, Multiprocessor
ANSWER= (A) Multiprocessor, UMA

 

7. Explicit vector instructions were introduced with the appearance of ___.

     Processors
     Micro processor
    Intel processors
ANSWER= (B)  Micro processor

 

8. The chip can be disabled or cut off from an external connection using              

    Chip select
    LOCK
    ACPT
ANSWER= (A) Chip select

 

9. The sum of two hexadecimal numbers 23D and 9AA gives the hexadecimal number

    AF7
    BF6
    BE7

ANSWER= (C) BE7

 

10.Giga is 2 to the power of -





ANSWER= (A) Types 2nd options

 

11.The information available in a state table may be represented graphically in a

     simple diagram.
    state diagram.
    complex diagram.

ANSWER= (B)  state diagram.

 

12. RAM is _______ and ______

    Volatile, permanent
    Nonvolatile, temporary
    Nonvolatile, permanent
ANSWER= (D) Volatile, temporary

 

13. Which of the following register is loaded with the contents of the memory location pointed E the PC 

    Memory address registers
    Memory data registers
    Instruction register
ANSWER= (A) Memory address registers

 

14. ROM tells the computer to

    Start up the operating system
     Connect to the hardware
     Turn on
ANSWER= (A) Start up the operating system

 

15. The instruction ‘ORG O’ is a______.

    Machine Instruction.
    Pseudo instruction.
    High level instruction.
ANSWER= (B) Pseudo instruction.

 

16. Which of the following comment about the program counter is true?

    It is used to count the number of instructions
     It is a cell in ROM
    During execution of the current instruction, its content changes
ANSWER= (C) During execution of the current instruction, its content changes

 

17. In computers, subtraction is carried out generally by____.

    1's complement method
    2's complement method
    signed magnitude method
ANSWER= (B)  2's complement method

 

18. Which of the following is a unit of measurement with computer systems

    Byte
     Megabyte
     Kilobyte
ANSWER= (D) All of the above

 

19. The speed imbalance between memory access & CPU operation can be reduced by 

     cache memory
    memory interleaving
    reducing memory size
ANSWER= (A) (a) & (b)

 

20.Let X and Y be the input and Z be the output of the XOR gate, the value of the Z is given by :

    X+Y
     X.Y
     (X.Y)’

ANSWER= (D) X’.Y + X.Y’

 

21. The addressing mode used in an instruction of the form ADD X Y, is _____.

    Absolute
     indirect
     index
ANSWER= (C) index

 

22. The sequence of events that happen during a typical fetch operation is

    PC → MDR→ Memory → IR 
    PCMAR-MEMORY MDR→IR
    PC MEMORY IR 
ANSWER= (B) PCMAR-MEMORY MDR→IR

 

23. Punched-card equipment was first introduced in Britain in 1904 by a small company. What was the name of that company?

    Accounting & Tabulating Corporation of Great Britain
    International Business Machines (IBM)
    Tabulator Machine company

ANSWER= (D) The Tabulator Ltd.

 

24. Negative numbers cannot be represented in

    Sign-magnitude form 
    1's complemented form
    2's complemented form
ANSWER= (A) Types 2nd options

 

25. _____ recognition can now open the computer world to those who may have been restricted due to a physical handicap.

    Speech
    Output
    Vision
ANSWER= (A) Speech

 

26.  ___ is the logical structure of a computer’s Random-Access Memory (RAM).

     Memory addressing
    Operation field
    Address field
ANSWER= (A) Memory addressing

 

27. The addressing mode used in an instruction of the form ADD X, Y is

    absolute register 
    immediate
    indirect
ANSWER= (D) index

 

28.  ___ is faster storage of copies of programs & data, which are ready for execution. The Cache is used to close up the speed gap between the Main memory and the ___.

     Cache Memory, CPU
    CPU, Cache Memory
    Primary Memory, Cache Memory
ANSWER= (A) Cache Memory, CPU

 

29. Which of the following register is used in the control unit of the CPU to indicate the next instruction which is to be executed ?

     Accumulator
    Index register
     Instruction decoder
ANSWER= (D)  Program counter

 

30. The exponent of a floating point number is represented in excess-N code (biased) so that

     the dynamic range is large 
    the precision is high
     the smallest number is represented by all zéroes
ANSWER= (D) overflow is avoided



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