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Computer Science MCQs

MCQs on Programming, Networking, Database and OS

601 Questions Subject Test
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Filter: All Exams css pms fpsc ppsc nts | All Easy Medium Hard
521
Medium css pms Uploaded: 20 Jun 2026

What is encapsulation in object-oriented programming?

  • A Combining data and methods into a single unit
  • B Creating multiple classes
  • C Executing parallel processes
  • D Allocating memory dynamically
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522
Easy pms Uploaded: 13 Aug 2026

Which of the following is a markup language, not a programming language?

  • A C++
  • B Python
  • C HTML
  • D Java
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523
Medium nts Uploaded: 23 Aug 2026

What is the function of a switch in networking?

  • A To direct data only to the intended device
  • B To broadcast data to all devices
  • C To provide internet access
  • D To store files
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524
Easy css Uploaded: 09 Aug 2026

What is the function of a web browser?

  • A Access and display web pages
  • B Compile code
  • C Store files permanently
  • D Manage hardware
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525
Medium css Uploaded: 13 Aug 2026

What is the purpose of a proxy server?

  • A Store files permanently
  • B Design web pages
  • C Compile programs
  • D Act as an intermediary between a client and server
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526
Medium nts Uploaded: 07 Aug 2026

What is the main advantage of using SSD over HDD?

  • A Higher power consumption
  • B Larger physical size
  • C Faster data access speed
  • D Lower cost per gigabyte
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527
Easy pms Uploaded: 23 Aug 2026

What is application software?

  • A A hardware component
  • B Software that manages hardware
  • C Software designed to perform specific user tasks
  • D A type of network protocol
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528
Easy nts Uploaded: 20 Jun 2026

Which Excel symbol is used to begin a formula?

  • A #
  • B @
  • C =
  • D $
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529
Medium ppsc Uploaded: 13 Aug 2026

What is a kernel?

  • A A hardware component
  • B A type of virus
  • C An application software
  • D Core part of an operating system
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530
Medium pms Uploaded: 13 Aug 2026

Which of the following is an example of secondary storage?

  • A RAM
  • B Register
  • C Hard Disk
  • D Cache
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531
Medium css Uploaded: 07 Aug 2026

Which sorting algorithm has the best average-case time complexity among these?

  • A Selection Sort
  • B Bubble Sort
  • C Quick Sort
  • D Insertion Sort
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532
Easy fpsc Uploaded: 13 Aug 2026

Which data structure uses LIFO (Last In First Out)?

  • A Array
  • B Linked List
  • C Queue
  • D Stack
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533
Medium pms Uploaded: 23 Aug 2026

What is a hyperlink?

  • A A database key
  • B A clickable link that navigates to another resource
  • C A hardware component
  • D A type of virus
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534
Easy nts Uploaded: 20 Jun 2026

Which Excel function returns the smallest value in a range?

  • A MAX()
  • B MIN()
  • C LOW()
  • D SMALL()
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535
Medium fpsc Uploaded: 09 Aug 2026

Which of the following is used to uniquely identify a computer on a network?

  • A URL
  • B IP Address
  • C Browser
  • D HTML tag
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536
Medium pms Uploaded: 13 Aug 2026

How many bits does Unicode UTF-16 typically use per character?

  • A 32
  • B 16
  • C 8
  • D 64
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537
Hard nts Uploaded: 07 Aug 2026

Which of the following best describes 'multithreading'?

  • A Running multiple operating systems simultaneously
  • B Connecting multiple computers via a network
  • C Executing multiple threads concurrently within a single process
  • D Storing data across multiple hard drives
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538
Medium css pms fpsc ppsc nts Uploaded: 25 Jun 2026

Which sorting algorithm generally provides the best average-case performance for large datasets?

  • A Quick Sort
  • B Merge Sort
  • C Bubble Sort
  • D Selection Sort
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539
Easy css Uploaded: 23 Aug 2026

Which key combination is used to undo an action?

  • A Ctrl+U
  • B Ctrl+Z
  • C Ctrl+X
  • D Ctrl+Y
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540
Medium fpsc nts Uploaded: 20 Jun 2026

Which SQL clause is used to filter rows before grouping?

  • A HAVING
  • B GROUP BY
  • C WHERE
  • D ORDER BY
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