Multiple choice

Which one of the following is true for a CPU having a single interrupt request line and a single interrupt grant line?

  1. Neither vectored interrupt nor multiple interrupting devices are possible

  2. Vectored interrupts are not possible but multiple interrupting devices are possible

  3. vectored interrupts and multiple interrupting devices are both possible

  4. vectored interrupt is possible but multiple interrupting devices are not possible
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Here multiple requests can be given to CPU but CPU interrupts only for highest priority interrupt so option (1) & (4) are wrong. But here in case of single interrupt lines definitely vectored interrupts are not possible.

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