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GATE CSE 2024 Session 2 Q25: Events that always move the running process out of running

Question

Consider a process P running on a CPU. Which one or more of the following events will always trigger a context switch by the OS that results in process P moving to a non-running state (e.g., ready, blocked)?

Try it: multiple select: one or more correct options

Select one or more options
Select all correct options. No negative marking, no partial marks.
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Answer: A, B (official GATE 2024 final answer key)

Concept used: A process must leave the running state when it has to wait for I/O; interrupts are handled and may return to it.

First step: For each event ask whether P itself must wait for a disk operation, or whether the OS may simply resume P after handling it.

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Source: official GATE 2024 Session 2 CS question paper and final answer key, organised by IISc Bangalore. Question paper · Answer key

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