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Computer Science MCQs

MCQs on Programming, Networking, Database and OS

198 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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181
Easy css Uploaded: 13 Aug 2026

What is social engineering in cybersecurity?

  • A A hardware design technique
  • B Manipulating people into revealing confidential information
  • C A network protocol
  • D A type of encryption
182
Easy nts Uploaded: 07 Aug 2026

What is the primary purpose of an IP protocol version 6 (IPv6) over IPv4?

  • A Provide a larger address space
  • B Reduce internet speed
  • C Eliminate the need for DNS
  • D Remove security features
183
Easy nts Uploaded: 23 Aug 2026

Which key uniquely identifies a record in a database table?

  • A Primary Key
  • B Candidate Key
  • C Composite Key
  • D Foreign Key
184
Easy fpsc nts Uploaded: 20 Jun 2026

Which protocol is primarily used for sending emails over the Internet?

  • A HTTP
  • B SMTP
  • C FTP
  • D DNS
185
Easy fpsc Uploaded: 23 Aug 2026

What is the function of a linker in programming?

  • A To manage memory allocation
  • B To design user interfaces
  • C To debug source code
  • D To combine object files into a single executable
186
Easy nts Uploaded: 20 Jun 2026

Which protocol is used to automatically obtain network configuration information?

  • A HTTP
  • B DHCP
  • C DNS
  • D SSH
187
Easy fpsc Uploaded: 07 Aug 2026

What is the primary purpose of version control systems like Git?

  • A Track and manage changes to source code over time
  • B Encrypt sensitive data
  • C Design user interfaces
  • D Compile programs into executables
188
Easy fpsc nts Uploaded: 20 Jun 2026

What is the role of DNS in networking?

  • A Assign IP addresses
  • B Translate domain names to IP addresses
  • C Transfer files
  • D Encrypt network traffic
189
Easy fpsc Uploaded: 13 Aug 2026

What is the purpose of a flowchart?

  • A Visually represent the steps of an algorithm
  • B Manage databases
  • C Compile code
  • D Store data
190
Easy ppsc Uploaded: 23 Aug 2026

Which of the following best describes blockchain technology?

  • A A programming language
  • B A local storage device
  • C A type of antivirus software
  • D A decentralized, distributed ledger system
191
Easy ppsc nts Uploaded: 20 Jun 2026

What is cloud storage?

  • A Local disk storage
  • B Storage accessible via the internet
  • C RAM allocation
  • D CPU cache
192
Easy nts Uploaded: 07 Aug 2026

Which device is used to input handwritten text into a computer?

  • A Printer
  • B Monitor
  • C Scanner
  • D Speaker
193
Easy nts Uploaded: 07 Aug 2026

Which of the following is a common cause of a memory leak in programming?

  • A Writing comments in code
  • B Using loops
  • C Failing to release unused memory
  • D Using too many variables
194
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
195
Easy fpsc Uploaded: 13 Aug 2026

What is the function of a motherboard?

  • A Store files permanently
  • B Display graphics only
  • C Provide internet access
  • D Connect and allow communication between hardware components
196
Easy fpsc nts Uploaded: 20 Jun 2026

What is the full form of VPN?

  • A Virtual Private Network
  • B Verified Public Network
  • C Virtual Program Node
  • D Visual Private Node
197
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
198
Easy pms Uploaded: 23 Aug 2026

What does SEO stand for?

  • A System Engine Optimization
  • B Search Engine Operation
  • C Software Engine Optimization
  • D Search Engine Optimization
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