Multiple choice

Which of the following is a special register that holds machine instructions?

  1. Control unit

  2. RAM

  3. Control instruction register

  4. ALU

  5. None of these

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The Instruction Register (IR) is the specific part of the CPU control unit that holds the instruction currently being decoded or executed. While the question uses a slightly non-standard term, it refers to the IR.