Given a set of processes arriving at different times with varying CPU bursts, which scheduling pattern does FCFS best represent?

easy🔍 Pattern Recognition Q2 of Q15

Operating Systems - FCFS Scheduling - Convoy Effect & Waiting Time

AShortest Job First, since it minimizes average waiting time.

BRound Robin, because it cycles through processes in order.

CPriority Scheduling, since it selects processes based on priority.

DFirst-Come, First-Served, as it executes processes strictly in arrival order.

Step-by-Step Solution

Solution:

Step 1: Understand FCFS pattern
FCFS executes processes in the order they arrive without considering burst time or priority.
Step 2: Analyze options
A: Shortest Job First selects shortest burst first, not arrival order.
B: Round Robin cycles with time slices, not strictly arrival order.
C: FCFS matches the description exactly.
D: Priority Scheduling selects based on priority, not arrival order.
Final Answer:
Option D -> Option D
Quick Check:
FCFS ignores burst and priority, runs by arrival [OK]

Quick Trick: FCFS ignores burst and priority, runs by arrival order [OK]

Common Mistakes:

MISTAKES

Trap Explanation:

PITFALL

Candidates often confuse FCFS with other scheduling algorithms that consider burst time or priority, but FCFS strictly follows arrival order.

Interviewer Note:

CONTEXT

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