Which one of the following statements is not correct with regard to the UNIX operating system ?

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Electrical Engineering

Which one of the following statements is not correct with regard to the UNIX operating system ?

This question was previously asked in

CDS 2 2026 Maths Question Paper (13-Sep-2026)

It is written in C.

It is portable to a variety of computers.

It is a multi-user operating system.

It cannot be time-shared by several users.

The correct answer is

It cannot be time-shared by several users.

UNIX Statement Analysis

This section evaluates the given statements about the UNIX operating system to identify the incorrect one.

Evaluating UNIX Features

Statement 1: It is written in C. This is correct. UNIX's design heavily utilized the C programming language, contributing significantly to its portability.
Statement 2: It is portable to a variety of computers. This is correct. Because UNIX was primarily written in C, it could be adapted (ported) to different hardware architectures more easily than systems written in assembly language.
Statement 3: It is a multi-user operating system. This is correct. UNIX was designed from early on to support multiple users logged in and running processes simultaneously.
Statement 4: It cannot be time-shared by several users. This is incorrect. UNIX is a prime example of a time-sharing operating system. Time-sharing allows multiple users to access and use the computer system concurrently by allocating small time slices to each user's process.

Conclusion on Incorrect Statement

The statement that UNIX cannot be time-shared by several users is false. UNIX is fundamentally a multi-user, time-sharing system.

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