GATE CSE 2026 Session 2 Q23: CPU scheduling algorithm that cannot be preemptive

Which one of the following CPU scheduling algorithms cannot be preemptive?

Try it: multiple choice: exactly one correct option

Wrong answer costs 1/3 mark in GATE.

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Answer: B (official GATE 2026 final answer key)

Concept used: Preemption takes the CPU away from a running process before it finishes or blocks.

First step: For each algorithm, ask whether anything can interrupt the running process.

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Source: official GATE 2026 Session 2 CS question paper and final answer key, organised by IIT Guwahati. Question paper · Answer key