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Computer Science MCQs with Answers

Computer knowledge is tested in jobs ranging from clerical posts to IT positions. Practice MCQs on computer fundamentals, hardware, software, MS Office, networking, internet, databases and programming concepts, and see your score as soon as you finish.

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Q121. What is the extension of an Excel file?

  1. .docx
  2. .xlsx
  3. .pptx
  4. .pdf
Show answer and explanation

Correct answer: B. .xlsx

Excel workbooks use .xlsx.

Q122. What is the process of copying data for safety called?

  1. Defragment
  2. Backup
  3. Format
  4. Restore
Show answer and explanation

Correct answer: B. Backup

Backups protect against data loss.

Q123. What is a process?

  1. A device driver
  2. A stored file
  3. A source code
  4. A program in execution
Show answer and explanation

Correct answer: D. A program in execution

A process is a running instance of a program.

Q124. What does DNS stand for?

  1. Digital Name Service
  2. Domain Name System
  3. Data Name System
  4. Domain Network System
Show answer and explanation

Correct answer: B. Domain Name System

DNS translates names to IP addresses.

Q125. In MS Word, which tab contains the Font group?

  1. Home
  2. Insert
  3. View
  4. Layout
Show answer and explanation

Correct answer: A. Home

The Font group is in Home.

Q126. What is the desktop in Windows?

  1. The main screen workspace
  2. A file type
  3. The CPU
  4. A program
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Correct answer: A. The main screen workspace

The desktop is the primary screen.

Q127. What is an interpreter?

  1. Prints output
  2. Translates whole program first
  3. Executes a program line by line
  4. Stores programs
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Correct answer: C. Executes a program line by line

An interpreter runs code statement by statement.

Q128. Which SQL clause sorts results?

  1. HAVING
  2. ORDER BY
  3. WHERE
  4. GROUP BY
Show answer and explanation

Correct answer: B. ORDER BY

ORDER BY sorts.

Q129. Which command is used to copy files in Linux?

  1. mv
  2. cpy
  3. cp
  4. copy
Show answer and explanation

Correct answer: C. cp

cp copies files.

Q130. Which Excel function returns the largest value?

  1. BIG
  2. TOP
  3. MAX
  4. HIGH
Show answer and explanation

Correct answer: C. MAX

MAX returns the largest value.

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