Which control signal is commonly used to indicate that an I/O device requires CPU attention?

Options

  • A. Memory write signal
  • B. Arithmetic carry signal
  • C. Interrupt request signal
  • D. Register clear signal only
  • E. None of the above

Correct Answer (Detailed Explanation is Below)

C. Interrupt request signal

Detailed Explanation

Explanation: An Interrupt Request (IRQ) signal notifies the CPU that a device or another source requires attention. The CPU may suspend its current execution flow to service the interrupt according to the system architecture and interrupt priority.