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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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Q271. Which shortcut key opens an existing document?

  1. Ctrl + P
  2. Ctrl + O
  3. Ctrl + W
  4. Ctrl + N
Show answer and explanation

Correct answer: B. Ctrl + O

Ctrl+O opens.

Q272. How many KB are in 1 MB (binary)?

  1. 1024
  2. 100
  3. 1000
  4. 512
Show answer and explanation

Correct answer: A. 1024

1 MB = 1024 KB.

Q273. Which shortcut key is used to cut?

  1. Ctrl + Z
  2. Ctrl + X
  3. Ctrl + C
  4. Ctrl + V
Show answer and explanation

Correct answer: B. Ctrl + X

Ctrl+X cuts.

Q274. What is the standard keyboard layout called?

  1. ABCDEF
  2. DVORAK
  3. AZERTY
  4. QWERTY
Show answer and explanation

Correct answer: D. QWERTY

QWERTY is named after the first six letters.

Q275. Which language is used to design web pages?

  1. C++
  2. HTML
  3. Python
  4. Java
Show answer and explanation

Correct answer: B. HTML

HTML structures web pages.

Q276. What does 'booting' mean?

  1. Turning off a computer
  2. Starting a computer
  3. Deleting files
  4. Installing software
Show answer and explanation

Correct answer: B. Starting a computer

Booting loads the OS.

Q277. What is the smallest unit of data in a computer?

  1. Word
  2. Bit
  3. Byte
  4. Nibble
Show answer and explanation

Correct answer: B. Bit

A bit is a binary digit, 0 or 1.

Q278. What does CU stand for in a CPU?

  1. Computer Unit
  2. Control Unit
  3. Central Unit
  4. Command Unit
Show answer and explanation

Correct answer: B. Control Unit

The CU directs operations.

Q279. What is a record in a database?

  1. A row in a table
  2. A table
  3. A database
  4. A column
Show answer and explanation

Correct answer: A. A row in a table

A record is a row.

Q280. In MS Access, a collection of records is called a:

  1. Form
  2. Query
  3. Report
  4. Table
Show answer and explanation

Correct answer: D. Table

A table stores records.

Computer Science MCQs by exam

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