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Computer Science MCQs

MCQs on Programming, Networking, Database and OS

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

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221
Medium pms Uploaded: 13 Aug 2026

Which of the following best describes 'cloud SaaS'?

  • A Hardware sold as a product
  • B A network cable standard
  • C A type of virus
  • D Software delivered over the internet on a subscription basis
222
Medium css Uploaded: 23 Aug 2026

Which of the following is a popular web browser?

  • A Google Chrome
  • B WinRAR
  • C Adobe Reader
  • D MS Word
223
Medium nts Uploaded: 13 Aug 2026

What is the purpose of RAID in storage systems?

  • A Encrypt stored data
  • B Compile source code
  • C Combine multiple disks for redundancy or performance
  • D Manage user accounts
224
Medium nts Uploaded: 23 Aug 2026

Which of the following best describes edge computing?

  • A A network topology
  • B Processing data only in the cloud
  • C A type of database
  • D Processing data closer to its source rather than a centralized location
225
Medium ppsc Uploaded: 09 Aug 2026

What is the function of 'RAM slots' on a motherboard?

  • A Connect to internet
  • B Hold memory modules
  • C Store permanent data
  • D Display graphics
226
Medium nts Uploaded: 23 Aug 2026

Which of the following is a linear data structure?

  • A Hash Table
  • B Graph
  • C Array
  • D Tree
227
Medium css Uploaded: 09 Aug 2026

What is the main function of an assembler?

  • A Convert assembly language to machine code
  • B Store data permanently
  • C Run applications
  • D Manage files
228
Medium ppsc Uploaded: 13 Aug 2026

Which of the following best describes 'latency' in networking?

  • A Total data transferred
  • B Delay before data transfer begins
  • C Storage capacity
  • D Number of devices connected
229
Medium fpsc Uploaded: 07 Aug 2026

What is the primary difference between a process and a thread?

  • A A process has its own memory space; threads share memory within a process
  • B Threads require separate operating systems
  • C Processes cannot run concurrently
  • D Threads always run slower than processes
230
Medium css Uploaded: 23 Aug 2026

What is the base of the octal number system?

  • A 8
  • B 2
  • C 16
  • D 10
231
Medium css pms Uploaded: 20 Jun 2026

Which data structure is most suitable for implementing recursion?

  • A Queue
  • B Array
  • C Stack
  • D Heap
232
Medium nts Uploaded: 07 Aug 2026

Which of the following best describes 'machine learning'?

  • A A file compression technique
  • B A type of computer hardware
  • C A network security protocol
  • D A subset of AI where systems learn from data
233
Medium css fpsc Uploaded: 20 Jun 2026

What does VLOOKUP do in Excel?

  • A Creates charts
  • B Searches values vertically
  • C Deletes rows
  • D Sorts data
234
Medium css pms Uploaded: 20 Jun 2026

What is multitasking in an operating system?

  • A Using multiple monitors
  • B Running multiple processes concurrently
  • C Installing multiple OS
  • D Using many files
235
Medium pms Uploaded: 09 Aug 2026

Which of the following is a popular relational database management system?

  • A MongoDB
  • B Cassandra
  • C MySQL
  • D Redis
236
Medium css pms fpsc ppsc nts Uploaded: 25 Jun 2026

What is the main purpose of a Firewall in a computer network?

  • A To prevent unauthorized access
  • B To remove all viruses from a computer
  • C To increase internet speed
  • D To store network Data
237
Medium css fpsc Uploaded: 20 Jun 2026

What is the purpose of an index in a database?

  • A Reduce security
  • B Improve query performance
  • C Store backups
  • D Encrypt records
238
Medium css Uploaded: 13 Aug 2026

Which company developed the first web browser?

  • A Apple
  • B Google
  • C CERN
  • D Microsoft
239
Medium pms Uploaded: 07 Aug 2026

What is the shortcut key to copy selected text?

  • A Ctrl+X
  • B Ctrl+Z
  • C Ctrl+C
  • D Ctrl+V
240
Medium ppsc nts Uploaded: 20 Jun 2026

What is Freeze Panes used for?

  • A Lock worksheet
  • B Keep rows or columns visible
  • C Protect workbook
  • D Hide formulas
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