Top 150+ Solved Computer Organization and Architecture MCQ Questions Answer
Q. n bits in operation code imply that there are ___________ possible distinctoperators.
a. 2n
b. 2n
c. n/2
d. n2
Q. 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
Q. The circuit converting binary data in to decimal is_____.
a. Encoder
b. Multiplexer
c. Decoder
d. Code converter
Q. The multiplicand register & multiplier register of a hardware circuitimplementing booth's algorithm have (11101) & (1100). The result shall be ______.
a. (812)10
b. (-12)10
c. (12)10
d. (-812)10
Q. PSW is saved in stack when there is a _____.
a. interrupt recognized
b. execution of RST instruction
c. Execution of CALL instruction
d. All of these
Q. 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
Q. The main memory in a Personal Computer (PC) is made of_____.
a. cache memory.
b. static RAM
c. Dynamic Ram
d. bothA.and (B).
Q. Cache memory works on the principle of_____.
a. Locality of data
b. Locality of memory
c. Locality of reference
d. Locality of reference & memory
Q. An n-bit microprocessor has_____.
a. n-bit program counter
b. n-bit address register
c. n-bit ALU
d. n-bit instruction register
Q. When CPU is executing a Program that is part of the Operating System, it issaid to be in _____.
a. Interrupt mode
b. System mode
c. Half mode
d. Simplex mode
Q. If the main memory is of 8K bytes and the cache memory is of 2K words. Ituses associative mapping. Then each word of cache memory shall be_____.
a. 11 bits
b. 21 bits
c. 16 bits
d. 20 bits
Q. A Stack-organised Computer uses instruction of _____.
a. Indirect addressing
b. Two-addressing
c. Zero addressing
d. Index addressing
Q. In a program using subroutine call instruction, it is necessary______.
a. initialize program counter
b. Clear the accumulator
c. Reset the microprocessor
d. Clear the instruction register
Q. Virtual memory consists of _______.
a. Static RAM
b. Dynamic RAM
c. Magnetic memory
d. None of these