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CSS MCQs

Civil Superior Services — Complete MCQ Bank

53 Questions
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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 Medium

Which programming language is commonly used for data analysis and machine learning?

  • ACOBOL
  • BPython
  • CPascal
  • DFortran
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Correct Answer: Option B — Python
Explanation: Python is widely used in data analysis and machine learning because of its readability and extensive libraries such as NumPy, Pandas, and Scikit-learn.
Submitted by: PaperMCQs
18
Computer Science Medium

What is the main purpose of a database management system (DBMS)?

  • ACreate hardware
  • BManage and organize data
  • CDesign websites
  • DControl printers
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Correct Answer: Option B — Manage and organize data
Explanation: A DBMS provides tools for storing, retrieving, updating, and managing data efficiently while maintaining integrity, security, and consistency.
Submitted by: PaperMCQs
19
Computer Science Medium

What is a Trojan Horse in cybersecurity?

  • AA network cable
  • BA type of malware disguised as legitimate software
  • CA firewall rule
  • DA backup utility
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Correct Answer: Option B — A type of malware disguised as legitimate software
Explanation: A Trojan Horse appears to be useful software but secretly performs malicious actions such as stealing information or providing unauthorized system access.
Submitted by: PaperMCQs
20
Computer Science Medium

What is the purpose of a compiler?

  • AExecute programs directly
  • BTranslate source code into machine code
  • CStore data permanently
  • DManage networks
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Correct Answer: Option B — Translate source code into machine code
Explanation: A compiler converts high-level programming language code into machine code that can be executed by a computer. It also checks syntax and reports programming errors.
Submitted by: PaperMCQs
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