Test Preparation

NTS / PTS Computer Science MCQs with Answers

17 practice MCQs on Computer Science for NTS / PTS tests. Think of your answer first, then open "Show answer and explanation". These are practice questions, not official examination papers.

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Q1. Which device is used for pointing on screen?

  1. Scanner
  2. Printer
  3. Speaker
  4. Mouse
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Correct answer: D. Mouse

A mouse is a pointing device.

Q2. Which generation of computers used transistors?

  1. Fourth generation
  2. Second generation
  3. First generation
  4. Third generation
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Correct answer: B. Second generation

Second generation computers used transistors.

Q3. What is the extension of a Word document?

  1. .txt
  2. .docx
  3. .pptx
  4. .xlsx
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Correct answer: B. .docx

Word documents use .docx.

Q4. Which generation of computers used vacuum tubes?

  1. Fourth generation
  2. Third generation
  3. First generation
  4. Second generation
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Correct answer: C. First generation

First generation computers used vacuum tubes.

Q5. Which of the following is an input device?

  1. Speaker
  2. Keyboard
  3. Printer
  4. Monitor
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Correct answer: B. Keyboard

A keyboard sends data to the computer.

Q6. How many bits are in a byte?

  1. 16
  2. 8
  3. 2
  4. 4
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Correct answer: B. 8

One byte equals 8 bits.

Q7. How many characters can standard ASCII represent?

  1. 128
  2. 64
  3. 512
  4. 256
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Correct answer: A. 128

7-bit ASCII has 128 characters.

Q8. What is the hexadecimal equivalent of decimal 15?

  1. 10
  2. A
  3. E
  4. F
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Correct answer: D. F

Decimal 15 is F in hex.

Q9. What is the process of copying data for safety called?

  1. Defragment
  2. Backup
  3. Format
  4. Restore
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Correct answer: B. Backup

Backups protect against data loss.

Q10. Which type of printer uses ink droplets?

  1. Inkjet
  2. Dot matrix
  3. Laser
  4. Thermal only
Show answer and explanation

Correct answer: A. Inkjet

Inkjet printers spray ink.

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