Identify the misconception in this statement: "Preemptive SJF scheduling always prevents starvation because it picks the shortest job available at any time."

medium🐞 Bug Identification Q7 of Q15

Operating Systems - Shortest Job First (SJF) - Preemptive vs Non-Preemptive

APreemptive SJF guarantees fairness by design

BPreemptive SJF does not consider arrival times, so starvation is impossible

CStarvation is only a problem in non-preemptive scheduling

DStarvation can still occur if short jobs keep arriving, indefinitely delaying longer jobs

Step-by-Step Solution

Solution:

Step 1: Understand starvation in preemptive SJF
Continuous arrival of shorter jobs can indefinitely delay longer jobs, causing starvation.
Step 2: Analyze incorrect claims
Preemptive SJF does consider arrival times; starvation can occur; fairness is not guaranteed.
Final Answer:
Option D -> Option D
Quick Check:
Starvation possible if short jobs keep arriving [OK]

Quick Trick: Starvation can occur despite preemption [OK]

Common Mistakes:

MISTAKES

Assuming preemptive SJF eliminates starvation
Believing arrival times are ignored
Thinking fairness is guaranteed

Trap Explanation:

PITFALL

Candidates often overestimate preemptive SJF's fairness and ignore starvation risks.

Interviewer Note:

CONTEXT

Tests awareness of starvation and fairness limitations in scheduling.

Master "Shortest Job First (SJF) - Preemptive vs Non-Preemptive" in Operating Systems

2 interactive learning modes - each teaches the same concept differently

Solution Trace

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More Operating Systems Quizzes

Identify the misconception in this statement: "Preemptive SJF scheduling always prevents starvation because it picks the shortest job available at any time."

Step 1: Understand starvation in preemptive SJF

Step 2: Analyze incorrect claims

Final Answer:

Quick Check:

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