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Q33 (CDS-I/2026) Science & Technology › ICT, AI, Cybersecurity & Emerging Tech

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

Result
Your answer: —  Â·  Correct: D

Explanation

The UNIX operating system is a powerful, multi-user, and multi-tasking system originally developed in the late 1960s at Bell Labs. The correct answer is D because the statement is factually incorrect.

  • Written in C: UNIX was one of the first operating systems to be written in a high-level language (C), rather than assembly language, which was the norm at the time.
  • Portability: Because it was written in C, UNIX became highly portable, meaning it could be moved to different computer architectures with minimal changes to the code.
  • Multi-user & Time-sharing: UNIX was designed specifically as a multi-user system. It utilizes time-sharing, a technique where the CPU switches between multiple users/tasks so rapidly that it appears they are all being served simultaneously. Therefore, the claim that it cannot be time-shared is false.
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