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Computer Organization & Architecture MCQ [ Set - 4 ] | Computer Organization and Architecture mcq with Answers


computer organization and architecture mcq with answers

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1. The less space consideration as lead to the development of (for large memories).

ANSWER= (D) Both SIMM’s and DIMS’s


2. Polled intrrupet are handled by

ANSWER= (A) software


3.  Consider a memory organised into 8K rows, and that it takes 4 cycles to complete a read operation. Then the refresh overhead of the chip is              

ANSWER= (B)  0.0038


4.  The half adder performs

     Decimal addition operation for 2 decimal inputs
    Binary addition operation for 2 binary inputs
    Decimal addition operation for 2 binary inputs
ANSWER= (C) Decimal addition operation for 2 binary inputs


5.  (2FAOC)16

    Both (a) and (b)
ANSWER= (B)  (00101111101000001100)2 


6.  In a normal n-bit adder, to find out if an overflow has occurred, we make use of

    AND gate
     NAND gate
    NOR gate
ANSWER= (D) XOR gate


7.  A Flip-Flop circuit can be used for

ANSWER= (A) Counting


8.  Given a 5 stage pipeline with stages taking 1,2,3,1, 1 units of time, the clock period of the pipeline is




9.  A 32-bit address bus allows access to a memory of capacity

    64 Mb
    16 Mb
    1 Gb
ANSWER= (D)  4 Gb


10.  Which of the following data transfer mode takes relatively more time?

    interrtupt initiated I/O
    programmed I/O
ANSWER= (C)programmed I/O


11.  Which of the following shift operations divide a signed binary number by 2 ?

    Logical left shift
    Logical right shift
    Arithmetic left shift
ANSWER= (B) Logical right shift


12. For which of the following multiplier numbers in Booth's algorithm maximum no. of additions and subtractions are required? 

ANSWER= (C) 00001111


13.  Which of the following holds data and processing instructions temporarily unit the CPU needs it?

    control unit
    main memory
ANSWER= (C) main memory


14. Octal equivalent of hexadecimal code, F3A1 is

ANSWER= (C) 171641


15. The resolution of the D/A converter is approximately 0.4% of its full-scale range. It is a

    8 – bit converter
    10 – bit converter
    12– bit converter
ANSWER= (A) 8 – bit converter


16. The operation which is cumulative but not associative is



17. The dual of the boolean theorm A.(B+C) = A.B + A.C is

    A + (B+C) = A.B + A.C
    A.(B+C) = (A+B) + (A+C)
    A+B.C = (A+B) + (A+C)

ANSWER= (C) A+B.C = (A+B) + (A+C)


18. Which is true 

A. For the pipelines – when an instruction is installed, all instructions issued.

B. Hazards in the pipelines can make it necessary to stall the pipelines

C. New instructions are fetched during the stall

D. Control Hazards can cause a greater performance loss than the data hazards

    A & B
    A, C, & D only
    A, B & D Only
ANSWER= (C) A, B & D Only


19. Generally Dynamic RAM is used as main memory in a computer system asit______.

    Consumes less power
    has higher speed
    has lower cell density
ANSWER= (B) has higher speed


20. Write Through technique is used in which memory for updating the data_____.

    Virtual memory
    Main memory
    Auxiliary memory

ANSWER= (D) Cache memory


21. Cache memory acts between_______.



22. SIMD represents an organization that

    refers to a computer system capable of processing several programs at the same time.
    represents organization of single computer containing a control unit, processor unit and a memory unit.
    includes many processing units under the supervision of a common control unit
ANSWER= (C) includes many processing units under the supervision of a common control unit


23. A Stack-organised Computer uses instruction of _____.

     Indirect addressing
    Zero addressing
ANSWER= (C) Zero addressing


24.In a program using subroutine call instruction, it is necessary______.

    initialize program counter
    Clear the accumulator
    Reset the microprocessor

ANSWER= (D) Clear the instruction register


25. Virtual memory consists of _______.

    Static RAM
    Dynamic RAM
     Magnetic memory
ANSWER= (A) Static RAM


26. CARRY, in half adder, can be obtained using

    EX-OR gate
    AND gate
ANSWER= (B) AND gate


27.  A NAND gate has inputs A and B. It's output is connected to the both of the inputs of another NAND gate. An equivalent gate for these two NAND gates is

    OR gate
    AND gate
    NOR gate

ANSWER= (B) AND gate


28.What characteristic of RAM memory makes it not suitable for permanent storage?

    too slow
    it is volatile

ANSWER= (C) it is volatile


29. Computers use addressing mode techniques for _____________________.

    giving programming versatility to the user by providing facilities as pointers to memory counters for loop control
    to reduce no. of bits in the field of instruction
    specifying rules for modifying or interpreting address field of the instruction

ANSWER= (D)  All the above


30. Both the arithmetic logic unit (ALU) and control selection of CPU employ special purpose storage locations called

ANSWER= (A) registers

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Computer Organization & Architecture MCQ Set -3(link)

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