20 Most Repeated Computer Fundamentals MCQs for NTS, CSS, PMS, KPPSC, PPSC, ETEA, SPSC, BPSC, and FPSC

Here are the 20 most repeated Computer Fundamentals MCQs, complete with options, correct answers, and explanations to help you solidify your understanding. These specific computer science questions appear frequently across various testing boards in Pakistan.

20 Most Repeated Computer Fundamentals MCQs

1. Who is known as the "Father of the Computer"?

A) Alan Turing
B) Charles Babbage
C) Bill Gates
D) Steve Jobs

Correct Answer: B) Charles Babbage
Explanation: Charles Babbage, a mathematician and inventor, originated the concept of a programmable general-purpose computer in the 1830s with his design for the "Analytical Engine."

2. Which component is considered the "brain" of a computer system?

A) RAM
B) Motherboard
C) CPU
D) Hard Drive

Correct Answer: C) CPU
Explanation: The Central Processing Unit (CPU) is the primary component of a computer that acts as its "brain." It processes instructions, performs calculations, and manages the flow of information through a computer system.

3. What does RAM stand for, and what type of memory is it?

A) Read Access Memory; Permanent
B) Random Access Memory; Volatile
C) Rapid Action Memory; Non-volatile
D) Random Array Memory; Permanent

Correct Answer: B) Random Access Memory; Volatile
Explanation: RAM stands for Random Access Memory. It is a "volatile" type of memory, meaning it only stores data temporarily while the computer is turned on. Once the power is off, the data in RAM is erased.

4. 1 Byte is equal to how many bits?

A) 4 bits
B) 8 bits
C) 16 bits
D) 32 bits

Correct Answer: B) 8 bits
Explanation: A bit (binary digit) is the smallest unit of data in a computer and has a single binary value, either 0 or 1. A byte is a sequence of 8 bits processed as a single unit of information.

5. First-generation computers relied on which technology?

A) Transistors
B) Integrated Circuits
C) Vacuum Tubes
D) Microprocessors

Correct Answer: C) Vacuum Tubes
Explanation: The first generation of computers (approx. 1940-1956) used bulky, heat-generating vacuum tubes for circuitry and magnetic drums for memory.

6. What does ALU stand for?

A) Application Logic Unit
B) Arithmetic Logic Unit
C) Array Logic Unit
D) Automatic Logic Unit

Correct Answer: B) Arithmetic Logic Unit
Explanation: The ALU is a crucial part of the CPU. It handles all the mathematical calculations (addition, subtraction) and logical operations (comparing values) for the computer.

7. Which of the following is an example of System Software?

A) Microsoft Word
B) Google Chrome
C) Windows 10
D) Adobe Photoshop

Correct Answer: C) Windows 10
Explanation: System software is a type of computer program that is designed to run a computer's hardware and application programs. An Operating System (like Windows, Linux, or macOS) is the best example of system software.

8. What does GUI stand for?

A) General Utility Interface
B) Graphical User Interface
C) Global User Index
D) Graphics Universal Interface

Correct Answer: B) Graphical User Interface
Explanation: A GUI allows users to interact with electronic devices through graphical icons and visual indicators (like windows, menus, and pointers) rather than text-based command lines.

9. Which of the following is non-volatile memory?

A) SRAM
B) DRAM
C) ROM
D) Cache

Correct Answer: C) ROM
Explanation: Read-Only Memory (ROM) is non-volatile, meaning it retains its stored data even when the computer's power is turned off. It typically holds the firmware needed to boot up the computer.

10. What is the standard keyboard shortcut to "Undo" an action?

A) Ctrl + Y
B) Ctrl + Z
C) Ctrl + X
D) Ctrl + C

Correct Answer: B) Ctrl + Z
Explanation: 'Ctrl + Z' is universally used to undo the last action performed in most software applications. `Ctrl + Y` is typically used to "Redo."

11. What does HTTP stand for?

A) Hypertext Transfer Protocol
B) Hyperlink Transfer Technology Protocol
C) Hypertext Transmission Process
D) High Transfer Text Protocol

Correct Answer: A) Hypertext Transfer Protocol
Explanation: HTTP is the foundational protocol used by the World Wide Web. It dictates how messages are formatted and transmitted over the internet, allowing web browsers to communicate with web servers.

12. 1 Megabyte (MB) is equal to:

A) 1000 Kilobytes (KB)
B) 1024 Kilobytes (KB)
C) 1024 Bytes
D) 1000 Gigabytes (GB)

Correct Answer: B) 1024 Kilobytes (KB)
Explanation: In traditional binary computing architectures, storage is calculated in powers of 2. Therefore, 1 Megabyte equals $2^{10}$ or 1024 Kilobytes.

13. Which shortcut key is used for "Find and Replace" in MS Word?

A) Ctrl + F
B) Ctrl + R
C) Ctrl + H
D) Ctrl + K

Correct Answer: C) Ctrl + H
Explanation: While `Ctrl + F` opens the "Find" dialog, `Ctrl + H` directly opens the "Find and Replace" dialog box in Microsoft Office applications.

14. What does LAN stand for?

A) Large Area Network
B) Local Area Network
C) Logical Area Network
D) Limited Area Network

Correct Answer: B) Local Area Network
Explanation: A LAN is a computer network that interconnects computers within a limited physical area such as a residence, school, laboratory, university campus, or office building.

15. Who invented the World Wide Web (WWW)?

A) Vint Cerf
B) Tim Berners-Lee
C) Marc Andreessen
D) Bob Kahn

Correct Answer: B) Tim Berners-Lee
Explanation: Sir Tim Berners-Lee, a British computer scientist, invented the World Wide Web in 1989 while working at CERN to facilitate information sharing among scientists globally.

16. Which of the following is an output device?

A) Scanner
B) Mouse
C) Microphone
D) Plotter

Correct Answer: D) Plotter
Explanation: A plotter is a specialized printer used to produce high-quality vector graphics and large-scale architectural or engineering drawings, making it an output device. The others are input devices.

17. What is the primary function of an Operating System?

A) To perform complex mathematical calculations
B) To protect the computer from viruses
C) To manage hardware and software resources
D) To create documents and spreadsheets

Correct Answer: C) To manage hardware and software resources
Explanation: The operating system acts as an intermediary between the user and the computer hardware. It allocates memory, schedules tasks, manages files, and coordinates hardware components.

18. What does URL stand for?

A) Universal Resource Locator
B) Uniform Resource Locator
C) Uniform Routing Link
D) Universal Routing Locator

Correct Answer: B) Uniform Resource Locator
Explanation: A URL is essentially a web address. It is a specific type of Uniform Resource Identifier (URI) that provides a way to locate a resource on the internet and indicates the protocol used to access it.

19. Which protocol is primarily used to send emails?

A) FTP
B) HTTP
C) SMTP
D) POP3

Correct Answer: C) SMTP
Explanation: SMTP stands for Simple Mail Transfer Protocol. It is the industry standard for sending (pushing) emails from a client to a mail server. (Note: POP3 and IMAP are used for *receivingemails).

20. What does the term "Phishing" refer to?

A) A type of computer virus
B) An attempt to acquire sensitive information by masquerading as a trustworthy entity
C) A method of formatting a hard drive
D) Enhancing a network's speed

Correct Answer: B) An attempt to acquire sensitive information by masquerading as a trustworthy entity
Explanation: Phishing is a cybercrime where attackers use deceptive emails, messages, or websites to trick individuals into revealing personal information, such as passwords or credit card numbers.