The register that holds the instruction to be executed is:
Correct answer: C. IR (Instruction Register)
- A. MAR (Memory Address Register)
- B. PC (Program Counter)
- C. IR (Instruction Register)
- D. The memory buffer register
Explanation
The instruction register is a small, high-speed register that holds the instruction currently being fetched from memory and decoded by the control unit. It essentially stores the next instruction to be executed by the CPU.
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Hardware includes the physical components of a computer, such as the CPU, motherboard, registers, memory, storage devices and peripheral equipment. Software covers system software, application software, utilities, drivers and firmware, with attention to how the operating system manages hardware and how software differs from the physical equipment it controls.
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