Question

31. A

A digital computer has a memory unit with 32 bits per word. The instruction set consists of 128 different operations. All instructions have an operation code part (opcode) and an address part (allowing for only one address). Each instruction is stored in one word of memory. How many bits are left for the address part of the instruction.

		7 bits
		17 bits
		25 bits
		32 bits

Answer 1

Answer 32 bits

if there are 128 instructions to be handled by the processor, you should make room for each one instruction, meaning 128 unique instruction codes for them.

Secondly, 32 - the above answer will give you the remaining bits

if you have any doubt then please ask me without any hesitation in the comment section below , if you like my answer then please thumbs up for the answer , before giving thumbs down please discuss the question it may possible that we may understand the question different way and we can edit and change the answers if you argue, thanks :)