MCQ IN COMPUTER SCIENCE & ENGINEERING

Detailed explanation-1: -The register which stores the address of the next instruction is called the program counter. Usually after each instruction is executed, the program counter increases by one (hence the use of the word counter) so that it contains the address of the next instruction.

Detailed explanation-2: -Program counter It is a 16-bit register used to store the memory address location of the next instruction to be executed. Microprocessor increments the program whenever an instruction is being executed, so that the program counter points to the memory address of the next instruction that is going to be executed.

Detailed explanation-3: -The correct answer is Program counter. Program Counter: A program counter (PC) is a CPU register in the computer processor which has the address of the next instruction to be executed from memory.

Detailed explanation-4: -Control Unit. CPUs also have several other registers, including the instruction register (IR); the program counter (PC), also called the instruction counter; and the memory address register (MAR), also called the address buffer. The IR is used to store the instruction word.

Detailed explanation-5: -In computing, the instruction register (IR) or current instruction register (CIR) is the part of a CPU’s control unit that holds the instruction currently being executed or decoded.