Top 150+ Solved Computer Organization and Architecture MCQ Questions Answer
Q. The addressing mode used in an instruction of the form ADD X Y, is
a. Absolute
b. indirect
c. index
d. none of these
Q. In a memory-mapped I/O system, which of the following will not be there?
a. LDA
b. IN
c. ADD
d. OUT
Q. 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
Q. The circuit used to store one bit of data is known as
a. Encoder
b. OR gate
c. Flip Flop
d. Decoder
Q. Write Through technique is used in which memory for updating the data
a. Virtual memory
b. Main memory
c. Auxiliary memory
d. Cache memory
Q. 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
Q. 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
Q. 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
Q. A Stack-organised Computer uses instruction of
a. Indirect addressing
b. Two-addressing
c. Zero addressing
d. Index addressing
Q. If the main memory is of 8K bytes and the cache memory is of 2K words. It uses associative mapping. Then each word of cache memory shall be
a. 11 bits
b. 21 bits
c. 16 bits
d. 20 bits