JAMIA 2026 — Computer PYQ

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Question

JAMIA 2026 — Computer PYQ

JAMIA | Computer | 2026

Which of the following is a non-preemptive multitasking operating system?

Choose the correct answer:

Explanation

Correct Option: (b) Windows 3.1

Solution

To understand why Windows 3.1 is the correct answer, let's break down the core concepts of multitasking environments.

1. What is Non-Preemptive Multitasking?

In a non-preemptive (also known as cooperative) multitasking operating system, the OS does not have control over when a process switches execution. Instead:

A currently running task must explicitly yield control or complete its execution before another task can run.
If a single application crashes, hangs, or refuses to release the CPU, the entire system can freeze.

2. What is Preemptive Multitasking?

In a preemptive multitasking operating system:

The OS scheduler can forcibly interrupt (preempt) a currently running process to allocate CPU time to another process based on priority or a time slice (quantum).
This ensures higher stability and smoother performance across multiple running programs.

3. Analyzing the Options

Operating System	Multitasking Type	Details
(a) Windows NT	Preemptive	Built from scratch as a robust, enterprise-grade 32-bit OS featuring true preemptive multitasking.
(b) Windows 3.1	Non-Preemptive	It relied on cooperative multitasking, where 16-bit Windows applications had to periodically yield control back to the system.
(c) Unix	Preemptive	Designed as a time-sharing, multi-user system from its early days, utilizing preemptive scheduling algorithms.
(d) Linux	Preemptive	A modern open-source Unix-like kernel designed from day one with a preemptive multitasking scheduler.

Hence, Windows 3.1 is the classic example of a non-preemptive (cooperative) multitasking environment.