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  • Input-Output Management MCQs | Interrupts & I/O Concepts | Suraku Academy

Q: 1 An attempt to divide by zero results in which type of interrupt?

  1. External Interrupt

  2. Internal Interrupt

  3. Software Interrupt

  4. Power failure Interrupt

[ Option B ]

An Interrupt is a signal that temporarily halts the CPU’s current execution to handle an event. Interrupts are classified into internal and external types:

  • Internal Interrupts (also called traps or exceptions) occur due to errors or specific conditions within the CPU, such as divide by zero or invalid opcode.
  • External Interrupts are generated by external devices, like keyboards, timers, or power failures.

A divide-by-zero operation is an error generated by the CPU itself, so it is an internal interrupt.

TYPE OF INTERRUPTDESCRIPTIONEXAMPLES
Internal InterruptGenerated by the CPU due to an error or specific condition during execution.Divide by zero, invalid opcode, overflow.
External InterruptGenerated by external devices or events outside the CPU.Keyboard input, mouse click, timer, power failure.
Software InterruptInitiated by a program instruction to request a service from the operating system.System calls, INT instruction in assembly.
Power Failure InterruptTriggered when there is a sudden loss or fluctuation of power.UPS signals, sudden shutdown detection.
Hardware InterruptSignal sent by hardware devices to get CPU attention.Printer ready, disk I/O complete.
Maskable InterruptCan be ignored or delayed by the CPU using interrupt masks.Timer interrupt in OS, peripheral device signals.
Non-Maskable InterruptCannot be ignored, must be processed immediately.Memory parity error, hardware failure signals.

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