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Computer Science MCQs

MCQs on Programming, Networking, Database and OS

72 Questions Subject Test
Subject Preparation Guide

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Strengthen your knowledge of computer fundamentals, hardware, software, programming, networks, databases and information technology.

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61
Medium css pms fpsc ppsc nts Uploaded: 22 Jun 2026

What is the default port number for HTTPS?

  • A 21
  • B 25
  • C 80
  • D 443
62
Medium fpsc nts Uploaded: 20 Jun 2026

What is the purpose of a checksum?

  • A Compress data
  • B Verify data integrity
  • C Increase speed
  • D Encrypt files
63
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
64
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
65
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
66
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
67
Medium nts Uploaded: 13 Aug 2026

What is bandwidth throttling?

  • A Intentionally slowing down internet speed
  • B Increasing internet speed permanently
  • C Storing data in cache
  • D Encrypting network traffic
68
Medium nts Uploaded: 23 Aug 2026

What is the function of an operating system's file system?

  • A To process graphics
  • B To connect to the internet
  • C To organize and manage data storage on disks
  • D To manage printers
69
Medium nts Uploaded: 13 Aug 2026

What is virtual memory?

  • A A type of cache
  • B Extra RAM chip
  • C Memory simulated using hard disk space
  • D A network storage
70
Medium nts Uploaded: 23 Aug 2026

What is the primary function of RAM in a computer?

  • A Temporary storage for actively used data
  • B Permanent data storage
  • C Displaying graphics
  • D Processing calculations
71
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
72
Medium nts Uploaded: 13 Aug 2026

Which of the following best defines 'throughput' in computing?

  • A Storage capacity of memory
  • B Number of errors in a program
  • C Amount of data processed in a given time
  • D Time delay in a system
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