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Computer Science MCQs

MCQs on Programming, Networking, Database and OS

162 Questions Subject Test
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101
Hard fpsc Uploaded: 13 Aug 2026

Which of the following is an advantage of using pseudocode before coding?

  • A It runs directly on hardware
  • B It helps plan program logic clearly before implementation
  • C It compiles faster than real code
  • D It replaces the need for testing
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102
Medium css pms fpsc ppsc nts Uploaded: 01 Jul 2026

Which data structure is primarily used by the Depth-First Search (DFS) algorithm?

  • A Queue
  • B Hash Table
  • C Stack
  • D Heap
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103
Medium fpsc Uploaded: 23 Aug 2026

Which wireless technology is commonly used for short-range device connections?

  • A Bluetooth
  • B Fiber Optic
  • C Ethernet
  • D DSL
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104
Medium css pms fpsc ppsc nts Uploaded: 25 Jun 2026

Who co-invented the World Wide Web (WWW) alongside Robert Cailliau?

  • A Tom Berners
  • B Mark Zuckerberg
  • C Tim Berners-Lee
  • D Bill Gates
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105
Medium fpsc Uploaded: 09 Aug 2026

What does 'API' stand for?

  • A Automated Program Interface
  • B Application Process Integration
  • C Application Programming Interface
  • D Application Protocol Interface
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106
Medium fpsc Uploaded: 23 Aug 2026

What is the purpose of a backup?

  • A To create a copy of data for recovery
  • B To speed up the computer
  • C To install software
  • D To delete unnecessary files
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107
Easy fpsc ppsc nts Uploaded: 18 Jun 2026

What does CPU stand for?

  • A Central Processing Unit
  • B Central Program Unit
  • C Computer Processing Unit
  • D Central Processor Utility
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108
Medium fpsc nts Uploaded: 20 Jun 2026

Which Access key uniquely identifies each record?

  • A Foreign Key
  • B Primary Key
  • C Composite Key
  • D Candidate Key
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109
Medium fpsc Uploaded: 23 Aug 2026

What is a nibble in computing?

  • A A group of 4 bits
  • B A group of 2 bits
  • C A group of 16 bits
  • D A group of 8 bits
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110
Medium fpsc nts Uploaded: 20 Jun 2026

Which Excel function counts non-empty cells?

  • A COUNT()
  • B COUNTA()
  • C COUNTIF()
  • D SUM()
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111
Easy fpsc nts Uploaded: 20 Jun 2026

What is malware?

  • A Network cable
  • B Malicious software
  • C Database table
  • D Operating system
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112
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
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113
Hard fpsc Uploaded: 13 Aug 2026

Which function in Excel is used to sum a range of cells?

  • A COUNT
  • B MAX
  • C AVERAGE
  • D SUM
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114
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
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115
Easy fpsc Uploaded: 13 Aug 2026

Which of the following is a client-server database?

  • A Notepad
  • B MySQL
  • C MS Access
  • D Excel
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116
Hard fpsc Uploaded: 13 Aug 2026

Which of these is considered strong password practice?

  • A Using birth date
  • B Sharing password with friends
  • C Using the same password everywhere
  • D Using a mix of letters, numbers, and symbols
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117
Hard fpsc Uploaded: 13 Aug 2026

What is the purpose of a web server?

  • A Manage hardware only
  • B Serve web pages and content to clients over the internet
  • C Design graphics
  • D Store user passwords only
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118
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
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119
Easy fpsc Uploaded: 23 Aug 2026

Which file extension is used for Microsoft Word documents?

  • A .pptx
  • B .docx
  • C .pdf
  • D .xlsx
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120
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
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