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IT Jobs Computer Science MCQs with Answers

179 practice MCQs on Computer Science for IT Jobs tests. Think of your answer first, then open "Show answer and explanation". These are practice questions, not official examination papers.

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Q91. Which of the following is a cloud storage service?

  1. Paint
  2. Notepad
  3. Calculator
  4. Google Drive
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Correct answer: D. Google Drive

Google Drive stores files online.

Q92. Which language is mainly used for styling web pages?

  1. CSS
  2. SQL
  3. Python
  4. C
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Correct answer: A. CSS

CSS controls presentation.

Q93. Which sorting algorithm has an average time complexity of O(n log n)?

  1. Bubble sort
  2. Insertion sort
  3. Merge sort
  4. Selection sort
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Correct answer: C. Merge sort

Merge sort is O(n log n).

Q94. What is virtual memory?

  1. Using disk space to extend RAM
  2. Extra CPU
  3. A type of ROM
  4. A cloud service
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Correct answer: A. Using disk space to extend RAM

Virtual memory uses disk as extended memory.

Q95. Which of the following is not a programming paradigm?

  1. Procedural
  2. Compilation
  3. Functional
  4. Object-oriented
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Correct answer: B. Compilation

Compilation is a process, not a paradigm.

Q96. Which of the following is an interpreted language?

  1. Python
  2. Fortran
  3. C
  4. C++
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Correct answer: A. Python

Python is commonly interpreted.

Q97. What is the base of the octal number system?

  1. 2
  2. 10
  3. 8
  4. 16
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Correct answer: C. 8

Octal uses digits 0-7.

Q98. What does VPN stand for?

  1. Variable Private Network
  2. Virtual Public Network
  3. Verified Private Network
  4. Virtual Private Network
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Correct answer: D. Virtual Private Network

A VPN encrypts traffic over public networks.

Q99. Which is the most popular topology with a central hub or switch?

  1. Ring topology
  2. Mesh topology
  3. Bus topology
  4. Star topology
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Correct answer: D. Star topology

Star topology uses a central device.

Q100. What is the full form of BIOS?

  1. Base Input Output Software
  2. Basic Input Output System
  3. Basic Internal Operating System
  4. Binary Input Output System
Show answer and explanation

Correct answer: B. Basic Input Output System

BIOS starts the computer at boot.

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