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Computer Science MCQs

MCQs on Programming, Networking, Database and OS

145 Questions Subject Test
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141
Medium css Uploaded: 09 Aug 2026

Which device is used to convert digital signals to analog and vice versa?

  • A Router
  • B Switch
  • C Modem
  • D Hub
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142
Easy css Uploaded: 13 Aug 2026

Which of the following is a feature of OOP?

  • A Global variables only
  • B Encapsulation
  • C Sequential execution only
  • D No reusability
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143
Easy css Uploaded: 13 Aug 2026

What is an interpreter?

  • A Translates and executes code line by line
  • B A database tool
  • C Compiles entire code at once
  • D A hardware component
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144
Medium css pms fpsc ppsc nts Uploaded: 25 Jun 2026

What type of communication occurs between a computer and a keyboard?

  • A Full-Duplex
  • B Simplex
  • C Half-Duplex
  • D Multiplex
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145
Hard css fpsc Uploaded: 20 Jun 2026

What is a deadlock in an operating system?

  • A A memory leak
  • B A security attack
  • C A situation where processes wait indefinitely for resources
  • D A file corruption error
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