NIMCET 2026 — Computer PYQ

Which of the following statements about the fetch-decode-execute cycle in a $CPU$ are correct?

I. The Program Counter ($PC$) is incremented after each instruction is fetched so the $CPU$ moves to the next instruction.

II. The Control Unit ($CU$) is responsible for fetching instructions and placing them in the Instruction Register ($IR$).

III. The $ALU$ is responsible for decoding instructions and determining which operation to perform.

IV. Registers are used to permanently store the operating system's files for fast access.

Identify the CORRECT option.