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PPSC MCQs

Punjab Public Service Commission — Complete MCQ Bank

46 Questions
Exam Preparation Guide

How to prepare for PPSC

PPSC examinations recruit candidates for Punjab government departments and commonly test general knowledge, current affairs, English and post-related subjects.

Punjab AffairsGeneral KnowledgeCurrent AffairsEnglish
Give special attention to Punjab geography, history and administration alongside the advertised post’s specialist syllabus.
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All Subjects Biology Chemistry Computer Science Current Affairs English Everyday Science General Knowledge Islamic Studies Mathematics Pakistan Studies Physics
11
Computer Science Medium

Which bus is primarily responsible for transferring data between the CPU and memory?

  • AAddress Bus
  • BExpansion Bus
  • CControl Bus
  • DData Bus
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Correct Answer: Option D — Data Bus
Explanation: The Data Bus is used to transfer actual data between the CPU, memory, and other hardware components. It carries information in both directions, allowing the processor to read data from memory and write data back to it. The width of the data bus affects how much data can be transferred at one time, influencing overall system performance and speed.
Submitted by: Chandi
12
Computer Science Medium

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

  • AQuick Sort
  • BMerge Sort
  • CBubble Sort
  • DSelection Sort
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Correct Answer: Option A — Quick Sort
Explanation: Quick Sort is often considered the fastest sorting algorithm in the average case because it has an average time complexity of O(n log n) and requires relatively low memory. It works by selecting a pivot element and partitioning the array into smaller subarrays. Although its worst-case complexity is O(n²), careful pivot selection usually results in very efficient performance in real-world applications.
Submitted by: Chandi
13
Computer Science Medium

Which memory type is most commonly used to store firmware in embedded systems?

  • ARAM
  • BVirtual Memory
  • CCache Memory
  • DROM
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Correct Answer: Option D — ROM
Explanation: ROM (Read-Only Memory) is commonly used to store firmware in embedded systems because it retains data even when power is turned off. Firmware contains essential instructions required for hardware initialization and operation. Unlike RAM, ROM provides non-volatile storage, making it reliable for permanent system software and device control programs.
Submitted by: Chandi
14
Computer Science Medium

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

  • ATom Berners
  • BMark Zuckerberg
  • CTim Berners-Lee
  • DBill Gates
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Correct Answer: Option C — Tim Berners-Lee
Explanation: Tim Berners-Lee, together with Robert Cailliau, played a key role in developing the World Wide Web at CERN in 1989. Berners-Lee created fundamental web technologies such as HTML, HTTP, and the first web browser. Their work transformed the internet into a user-friendly system for sharing and accessing information worldwide.
Submitted by: Chandi
15
Computer Science Medium

Who is widely regarded as the father of Computer Science?

  • AJohn von Neumann
  • BAlan Turing
  • CCharles Babbage
  • DBill Gates
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Correct Answer: Option B — Alan Turing
Explanation: Alan Turing is widely known as the father of Computer Science because he developed the theoretical foundation of modern computing. In 1936, he introduced the concept of the Turing Machine, which demonstrated how computers can process information and solve problems through algorithms. His work also played a major role in the development of artificial intelligence and computer theory, making him one of the most influential figures in computing history.
Submitted by: Chandi
16
Computer Science Medium

What is the default port number for HTTPS?

  • A21
  • B25
  • C80
  • D443
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Correct Answer: Option D — 443
Explanation: HTTPS (HyperText Transfer Protocol Secure) uses port 443 by default to provide secure communication over the Internet. It encrypts data using SSL/TLS protocols, protecting sensitive information such as passwords, banking details, and personal data from attackers
Submitted by: PaperMCQs
17
Computer Science Easy

Which Excel feature is used to display only records matching specific criteria?

  • ASort
  • BFilter
  • CFreeze Panes
  • DConditional Formatting
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Correct Answer: Option B — Filter
Explanation: Filtering allows users to display only rows that meet specified conditions while temporarily hiding other records, making analysis easier.
Submitted by: PaperMCQs
18
Computer Science Easy

What does BIOS stand for?

  • ABasic Input Output System
  • BBinary Input Operating System
  • CBasic Integrated Operating Software
  • DBuilt-In Output System
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Correct Answer: Option A — Basic Input Output System
Explanation: BIOS is firmware stored on a motherboard that initializes hardware during startup and loads the operating system. It performs essential checks and configuration tasks before handing control to the operating system.
Submitted by: PaperMCQs
19
Computer Science Easy

Which search engine was founded by Larry Page and Sergey Brin?

  • AYahoo
  • BBing
  • CGoogle
  • DDuckDuckGo
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Correct Answer: Option C — Google
Explanation: Google was founded by Larry Page and Sergey Brin and became the world's leading search engine.
Submitted by: PaperMCQs
20
Computer Science Easy

Which software is used to create spreadsheets?

  • APowerPoint
  • BExcel
  • CAccess
  • DOutlook
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Correct Answer: Option B — Excel
Explanation: Microsoft Excel is a spreadsheet application used for calculations and data analysis.
Submitted by: PaperMCQs
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