Computer & IT 100 MCQs 2026 | PPSC FPSC Practice Test

Read Also: English MCQs 2026 — 100 Most Important MCQs with Answers for PPSC FPSC

Computer and Information Technology (IT) has become a mandatory section in almost all government recruitment tests in Pakistan, including PPSC, FPSC, NTS, and FIA. Whether you are applying for a clerical job or an officer-level post, you will find 10% to 20% of the paper dedicated to basic computer knowledge.

This comprehensive set of 100 Computer & IT MCQs has been carefully selected from verified past papers from 2018 to 2025. Every question comes with a detailed explanation to help you understand the concept and perform better in your upcoming exams.

Key Areas of Computer Science for PPSC/FPSC

To score maximum marks in the computer section, candidates should focus on the following core areas:

MS Office (Word, Excel, PowerPoint): This is the most heavily tested area. Memorize all the shortcut keys (e.g., Ctrl+Z, Ctrl+Y, Ctrl+K) and basic functionalities like Mail Merge, Macros, and Excel formulas.
Hardware & Architecture: Basics of CPU, RAM, ROM, Input/Output devices, and generations of computers.
Internet & Networking: Protocols (HTTP, FTP, SMTP), web browsers, search engines, and basic networking topologies (LAN, WAN, MAN).
Computer Security: Viruses, malware, firewalls, and phishing.

Computer Practice Test — 100 MCQs

Test your IT skills by attempting the interactive quiz below. Read each question carefully and select the best answer. Click "Show My Result" at the end of the quiz to instantly view your score and read detailed explanations for all 100 questions.

📝 Interactive Practice Test (100 MCQs)

0 / 100 answered

Question 1 of 100

Who is considered the father of computers?

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

✅ Correct Answer: B
Exp: Charles Babbage, an English polymath, is considered the "father of the computer" for inventing the first mechanical computer (Difference Engine and Analytical Engine).

Question 2 of 100

Which of the following is the brain of the computer?

A. RAM B. Motherboard C. CPU D. Hard Disk

✅ Correct Answer: C
Exp: The Central Processing Unit (CPU) is considered the brain of the computer because it processes all instructions and manages the hardware.

Question 3 of 100

RAM stands for:

A. Read Access Memory B. Random Access Memory C. Run Accept Memory D. Rapid Access Memory

✅ Correct Answer: B
Exp: RAM stands for Random Access Memory. It is the short-term, volatile memory of a computer where active data is stored.

Question 4 of 100

Which of the following is a non-volatile memory?

A. RAM B. Cache C. ROM D. Register

✅ Correct Answer: C
Exp: ROM (Read-Only Memory) is non-volatile, meaning it retains its data even when the computer's power is turned off.

Question 5 of 100

1 Byte is equal to:

A. 4 bits B. 8 bits C. 16 bits D. 1024 bits

✅ Correct Answer: B
Exp: A byte is a unit of digital data that typically consists of 8 bits. A group of 4 bits is called a nibble.

Question 6 of 100

1 Kilobyte (KB) is equal to:

A. 1000 Bytes B. 1024 Bytes C. 1000 Bits D. 1024 Bits

✅ Correct Answer: B
Exp: In binary computing, 1 KB is equal to 1024 bytes (2^10 bytes).

Question 7 of 100

Which of the following is an input device?

A. Monitor B. Printer C. Keyboard D. Speaker

✅ Correct Answer: C
Exp: A keyboard is used to input data into the computer. Monitors, printers, and speakers are output devices.

Question 8 of 100

The physical components of a computer are called:

A. Software B. Hardware C. Malware D. Firmware

✅ Correct Answer: B
Exp: Hardware refers to the physical, tangible parts of a computer, such as the monitor, keyboard, motherboard, and CPU.

Question 9 of 100

The shortcut key to copy selected text is:

A. Ctrl + C B. Ctrl + V C. Ctrl + X D. Ctrl + P

✅ Correct Answer: A
Exp: Ctrl + C is the universal shortcut key for copying selected text or files in Windows.

Question 10 of 100

The shortcut key to paste text is:

A. Ctrl + P B. Ctrl + S C. Ctrl + V D. Ctrl + X

✅ Correct Answer: C
Exp: Ctrl + V is used to paste the copied or cut items. Ctrl + P is for printing.

Question 11 of 100

The shortcut key to cut selected text is:

A. Ctrl + C B. Ctrl + Z C. Ctrl + X D. Ctrl + K

✅ Correct Answer: C
Exp: Ctrl + X is used to cut text, which removes it from its original location and copies it to the clipboard.

Question 12 of 100

The shortcut key for Undo is:

A. Ctrl + Y B. Ctrl + Z C. Ctrl + U D. Ctrl + R

✅ Correct Answer: B
Exp: Ctrl + Z is used to undo the last action. Ctrl + Y is used to redo an action.

Question 13 of 100

Which function key is used to refresh the active window?

A. F2 B. F3 C. F4 D. F5

✅ Correct Answer: D
Exp: The F5 key is universally used to refresh or reload a web page or an active window in Windows.

Question 14 of 100

In MS Word, what is the shortcut key for "Highlight All"?

A. Ctrl + S B. Ctrl + A C. Ctrl + L D. Ctrl + X

✅ Correct Answer: B
Exp: Ctrl + A highlights all the text and objects in the current file or window.

Question 15 of 100

What is the shortcut key to Save a document in MS Office?

A. Ctrl + S B. Ctrl + D C. Shift + S D. Alt + S

✅ Correct Answer: A
Exp: Ctrl + S is the standard shortcut to save the current document.

Question 16 of 100

Which shortcut key is used to open a new document in MS Word?

A. Ctrl + O B. Ctrl + M C. Ctrl + N D. Ctrl + W

✅ Correct Answer: C
Exp: Ctrl + N opens a new, blank document. Ctrl + O is used to open an existing document.

Question 17 of 100

The shortcut key to "Find" text in a document is:

A. Ctrl + F B. Ctrl + H C. Ctrl + S D. Ctrl + G

✅ Correct Answer: A
Exp: Ctrl + F opens the Find dialog box or navigation pane to search for specific text.

Question 18 of 100

The shortcut key for "Replace" in MS Word is:

A. Ctrl + R B. Ctrl + H C. Ctrl + F D. Ctrl + P

✅ Correct Answer: B
Exp: Ctrl + H opens the Find and Replace dialog box in MS Word.

Question 19 of 100

In MS Word, what does Ctrl + B do?

A. It breaks the line B. It makes the text Bold C. It adds a border D. It changes the background

✅ Correct Answer: B
Exp: Ctrl + B applies or removes bold formatting from the selected text.

Question 20 of 100

What does Ctrl + I do in MS Word?

A. Indents text B. Inserts a picture C. Makes text Italic D. Increases font size

✅ Correct Answer: C
Exp: Ctrl + I applies or removes italic formatting from the selected text.

Question 21 of 100

What does Ctrl + U do in MS Word?

A. Undoes an action B. Underlines the text C. Uppercases the text D. Updates the document

✅ Correct Answer: B
Exp: Ctrl + U applies or removes an underline from the selected text.

Question 22 of 100

The shortcut key to print a document is:

A. Ctrl + P B. Ctrl + PrtSc C. Alt + P D. Shift + P

✅ Correct Answer: A
Exp: Ctrl + P opens the print dialog box in almost all Windows applications.

Question 23 of 100

What is the default file extension for MS Word 2007 and later?

A. .doc B. .docx C. .txt D. .rtf

✅ Correct Answer: B
Exp: MS Word 2007 and later versions use the .docx extension (Office Open XML format). Older versions used .doc.

Question 24 of 100

In MS Excel, a formula always begins with which symbol?

A. Plus (+) B. Minus (-) C. Equals (=) D. At (@)

✅ Correct Answer: C
Exp: In Microsoft Excel, every formula or function must start with an equals sign.

Question 25 of 100

What is the intersection of a row and a column in MS Excel called?

A. Box B. Block C. Cell D. Grid

✅ Correct Answer: C
Exp: A cell is the intersection of a horizontal row and a vertical column in a spreadsheet.

Question 26 of 100

In MS Excel, rows are identified by:

A. Letters (A, B, C...) B. Numbers (1, 2, 3...) C. Roman numerals (I, II, III...) D. Symbols (@, #, $)

✅ Correct Answer: B
Exp: In Excel, rows are identified by numbers, while columns are identified by letters.

Question 27 of 100

What is the shortcut key to insert a hyper-link in a document?

A. Ctrl + H B. Ctrl + L C. Ctrl + K D. Ctrl + I

✅ Correct Answer: C
Exp: Ctrl + K is the universal shortcut to insert a hyperlink in MS Word, Excel, and many other applications.

Question 28 of 100

In MS Word, Ctrl + E is used for:

A. Exit application B. End of document C. Center alignment D. Even spacing

✅ Correct Answer: C
Exp: Ctrl + E centers the selected text or paragraph. Ctrl + L is for left alignment, and Ctrl + R is for right alignment.

Question 29 of 100

In MS Word, Ctrl + J is used for:

A. Justify alignment B. Jump to page C. Join cells D. Just end

✅ Correct Answer: A
Exp: Ctrl + J justifies the text, aligning it evenly along both the left and right margins.

Question 30 of 100

Which key is used to rename a file or folder in Windows?

A. F1 B. F2 C. F3 D. F4

✅ Correct Answer: B
Exp: Selecting a file or folder and pressing F2 allows you to rename it instantly.

Question 31 of 100

In MS PowerPoint, which key is used to start a slideshow from the beginning?

A. F5 B. Shift + F5 C. F7 D. Ctrl + S

✅ Correct Answer: A
Exp: Pressing F5 starts the slideshow from the first slide. Shift + F5 starts it from the current slide.

Question 32 of 100

What is the default file extension for MS PowerPoint 2007 and later?

A. .ppt B. .pptx C. .pps D. .ptx

✅ Correct Answer: B
Exp: MS PowerPoint 2007 and later versions use the .pptx extension.

Question 33 of 100

What is the shortcut key to insert a new slide in PowerPoint?

A. Ctrl + N B. Ctrl + S C. Ctrl + M D. Ctrl + I

✅ Correct Answer: C
Exp: Ctrl + M inserts a new slide into the current presentation. Ctrl + N opens a completely new presentation file.

Question 34 of 100

HTTP stands for:

A. HyperText Transfer Protocol B. Hyper Transfer Text Protocol C. HighText Transfer Protocol D. HyperText Transmission Process

✅ Correct Answer: A
Exp: HTTP (HyperText Transfer Protocol) is the foundation of data communication for the World Wide Web.

Question 35 of 100

HTTPS is more secure than HTTP because the 'S' stands for:

A. System B. Secure C. Server D. Socket

✅ Correct Answer: B
Exp: The 'S' in HTTPS stands for Secure. It uses encryption (SSL/TLS) to protect data transferred between the browser and the server.

Question 36 of 100

URL stands for:

A. Universal Resource Link B. Uniform Resource Locator C. Uniform Registered Link D. Universal Routing Locator

✅ Correct Answer: B
Exp: A Uniform Resource Locator (URL) is colloquially termed a web address, specifying the location of a web resource.

Question 37 of 100

LAN stands for:

A. Local Area Network B. Large Area Network C. Logical Area Network D. Local Access Network

✅ Correct Answer: A
Exp: A Local Area Network (LAN) is a computer network that interconnects computers within a limited area like a home or school.

Question 38 of 100

WAN stands for:

A. Wide Area Network B. Wireless Area Network C. Web Area Network D. Window Area Network

✅ Correct Answer: A
Exp: A Wide Area Network (WAN) extends over a large geographical area, such as the Internet itself.

Question 39 of 100

Wi-Fi stands for:

A. Wireless Finder B. Wireless Fidelity C. Wired Fidelity D. Wireless Firewall

✅ Correct Answer: B
Exp: Wi-Fi is widely accepted to stand for Wireless Fidelity, a technology for wireless local area networking.

Question 40 of 100

IP stands for:

A. Internet Protocol B. Intranet Protocol C. Internal Protocol D. International Protocol

✅ Correct Answer: A
Exp: Internet Protocol (IP) is the principal set of rules for routing and addressing packets of data so they can travel across networks.

Question 41 of 100

GUI stands for:

A. General User Interface B. Graphical User Interface C. Guided User Interface D. Graphical Utility Interface

✅ Correct Answer: B
Exp: A Graphical User Interface (GUI) allows users to interact with electronic devices through graphical icons and visual indicators.

Question 42 of 100

OS stands for:

A. Open Software B. Optical System C. Operating System D. Output System

✅ Correct Answer: C
Exp: An Operating System (OS) is system software that manages computer hardware and software resources (e.g., Windows, Linux, Android).

Question 43 of 100

Which of the following is an example of an Operating System?

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

✅ Correct Answer: C
Exp: Windows 10 is an Operating System. The others are application software.

Question 44 of 100

USB stands for:

A. Universal Serial Bus B. Universal System Bus C. Uniform Serial Bus D. Universal Standard Bus

✅ Correct Answer: A
Exp: Universal Serial Bus (USB) is an industry standard that establishes specifications for cables and connectors.

Question 45 of 100

PDF stands for:

A. Printed Document File B. Portable Document Format C. Public Document Folder D. Portable Data Format

✅ Correct Answer: B
Exp: Portable Document Format (PDF) is a file format developed by Adobe to present documents reliably.

Question 46 of 100

Which protocol is used to send emails?

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

✅ Correct Answer: C
Exp: Simple Mail Transfer Protocol (SMTP) is the standard protocol for sending emails across the Internet.

Question 47 of 100

Which protocol is used to receive emails?

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

✅ Correct Answer: C
Exp: Post Office Protocol version 3 (POP3) and IMAP are used to retrieve and receive emails from a mail server.

Question 48 of 100

FTP stands for:

A. File Transfer Protocol B. Fast Transfer Protocol C. Folder Transfer Protocol D. File Transmission Process

✅ Correct Answer: A
Exp: File Transfer Protocol (FTP) is used for the transfer of computer files between a client and server on a network.

Question 49 of 100

A program that can replicate itself and spread from one computer to another is called a:

A. Firewall B. Virus C. Browser D. Compiler

✅ Correct Answer: B
Exp: A computer virus is a type of malicious software that, when executed, replicates itself by modifying other computer programs.

Question 50 of 100

What is a Firewall used for?

A. Cooling the computer B. Enhancing graphics C. Security and filtering network traffic D. Increasing RAM speed

✅ Correct Answer: C
Exp: A firewall is a network security device that monitors and filters incoming and outgoing network traffic based on security policies.

Question 51 of 100

Phishing is an example of:

A. A hardware device B. A computer game C. A cyber attack D. A programming language

✅ Correct Answer: C
Exp: Phishing is a cyber attack where attackers deceive people into revealing sensitive information by pretending to be a trustworthy entity.

Question 52 of 100

Which of the following is an example of a web browser?

A. Google B. Yahoo C. Google Chrome D. Bing

✅ Correct Answer: C
Exp: Google Chrome is a web browser used to access the internet. Google, Yahoo, and Bing are search engines.

Question 53 of 100

Which of the following is a search engine?

A. Mozilla Firefox B. Safari C. Google D. Opera

✅ Correct Answer: C
Exp: Google is a search engine used to find information on the internet. The others are web browsers.

Question 54 of 100

The process of transferring files from a local computer to a server on the Internet is called:

A. Downloading B. Uploading C. Browsing D. Surfing

✅ Correct Answer: B
Exp: Uploading is the transmission of a file from one computer system to another, usually larger computer system. Downloading is the reverse.

Question 55 of 100

The shortcut key to close the current active window or application is:

A. Alt + F4 B. Ctrl + C C. Shift + F4 D. Alt + C

✅ Correct Answer: A
Exp: Alt + F4 is universally used in Windows to close the active window or exit an application.

Question 56 of 100

What does the "BCC" field in an email stand for?

A. Blind Carbon Copy B. Blank Carbon Copy C. Basic Carbon Copy D. Blind Copy Contact

✅ Correct Answer: A
Exp: Blind Carbon Copy (BCC) is a way of sending emails to multiple people without them knowing who else received the email.

Question 57 of 100

What does the "CC" field in an email stand for?

A. Contact Copy B. Carbon Copy C. Clear Copy D. Current Copy

✅ Correct Answer: B
Exp: Carbon Copy (CC) is used to send a copy of an email to someone who is not the primary recipient.

Question 58 of 100

Which company created the Windows operating system?

A. Apple B. IBM C. Microsoft D. Google

✅ Correct Answer: C
Exp: Microsoft Corporation, founded by Bill Gates and Paul Allen, developed the Windows operating system.

Question 59 of 100

Which company created the macOS and iOS operating systems?

A. Microsoft B. Google C. Samsung D. Apple

✅ Correct Answer: D
Exp: Apple Inc. develops macOS for its Mac computers and iOS for its iPhones.

Question 60 of 100

Android is an operating system developed by:

A. Apple B. Microsoft C. Google D. Nokia

✅ Correct Answer: C
Exp: Android is a mobile operating system based on a modified version of the Linux kernel, developed primarily by Google.

Question 61 of 100

Which of the following is considered an open-source operating system?

A. Windows 10 B. macOS C. Linux D. iOS

✅ Correct Answer: C
Exp: Linux is a family of open-source Unix-like operating systems. Its source code is freely available for anyone to modify.

Question 62 of 100

What is the main function of the ALU in a CPU?

A. Storing data B. Performing arithmetic and logical operations C. Controlling input devices D. Connecting to the internet

✅ Correct Answer: B
Exp: The Arithmetic Logic Unit (ALU) is the part of a computer processor (CPU) that carries out arithmetic and logic operations.

Question 63 of 100

The base of the binary number system is:

A. 2 B. 8 C. 10 D. 16

✅ Correct Answer: A
Exp: The binary number system uses only two digits: 0 and 1. Therefore, its base is 2.

Question 64 of 100

The base of the decimal number system is:

A. 2 B. 8 C. 10 D. 16

✅ Correct Answer: C
Exp: The decimal system (the one we use daily) uses ten digits (0-9), so its base is 10.

Question 65 of 100

HTML stands for:

A. Hyper Text Makeup Language B. Hyper Text Markup Language C. High Tech Markup Language D. Hyper Text Machine Language

✅ Correct Answer: B
Exp: HTML (Hyper Text Markup Language) is the standard markup language for documents designed to be displayed in a web browser.

Question 66 of 100

CSS stands for:

A. Cascading Style Sheets B. Creative Style Sheets C. Computer Style Sheets D. Colorful Style Sheets

✅ Correct Answer: A
Exp: CSS (Cascading Style Sheets) is a language used for describing the presentation of a document written in HTML.

Question 67 of 100

Which programming language is known as the language of the web?

A. C++ B. Python C. Java-Script D. Java

✅ Correct Answer: C
Exp: Java-Script is primarily used to create interactive effects within web browsers, making it the core language of the web alongside HTML and CSS.

Question 68 of 100

Which device is used to connect a computer to the internet via a telephone line?

A. Router B. Switch C. Modem D. Hub

✅ Correct Answer: C
Exp: A modem (modulator-demodulator) converts digital signals from a computer into analog signals to travel over phone lines, and vice versa.

Question 69 of 100

What does a Router do?

A. Scans for viruses B. Forwards data packets between computer networks C. Prints documents D. Stores files permanently

✅ Correct Answer: B
Exp: A router is a networking device that forwards data packets between computer networks, connecting your home network to the internet.

Question 70 of 100

What is the primary purpose of a Cache memory?

A. To permanently store data B. To act as a backup for the hard drive C. To speed up data retrieval by storing frequently accessed data D. To cool down the CPU

✅ Correct Answer: C
Exp: Cache is a smaller, faster memory closer to the CPU that stores copies of the data from frequently used main memory locations.

Question 71 of 100

Which key deletes the character to the right of the cursor?

A. Backspace B. Delete C. Enter D. Shift

✅ Correct Answer: B
Exp: The 'Delete' key removes the character to the right of the cursor. The 'Backspace' key removes the character to the left.

Question 72 of 100

In MS Excel, what is a workbook?

A. A single spreadsheet B. A collection of charts C. A file containing one or more worksheets D. A formula menu

✅ Correct Answer: C
Exp: An Excel file is called a workbook, which can contain multiple worksheets (tabs) to organize data.

Question 73 of 100

Which Excel function is used to add all numbers in a range of cells?

A. ADD() B. TOTAL() C. SUM() D. PLUS()

✅ Correct Answer: C
Exp: The SUM() function is used to add together all the numerical values in a selected range of cells.

Question 74 of 100

In MS Word, what is the shortcut for Subscript?

A. Ctrl and Equals B. Ctrl + Shift + Plus C. Ctrl + Shift + Minus D. Alt and Equals

✅ Correct Answer: A
Exp: Pressing Ctrl and Equals turns the selected text into subscript (slightly below the normal line of text).

Question 75 of 100

In MS Word, what is the shortcut for Superscript?

A. Ctrl and Equals B. Ctrl + Shift + Plus C. Ctrl + Shift + S D. Alt + S

✅ Correct Answer: B
Exp: Pressing Ctrl + Shift + Plus turns the selected text into superscript (slightly above the normal line of text, like in math powers).

Question 76 of 100

What is the function of the ESC key?

A. To execute a command B. To cancel or abort the current operation C. To save a file D. To shut down the computer

✅ Correct Answer: B
Exp: The Escape (ESC) key is universally used to cancel, abort, or close a current dialog box or operation.

Question 77 of 100

What does VPN stand for?

A. Virtual Personal Network B. Virtual Private Network C. Visual Private Network D. Virtual Public Network

✅ Correct Answer: B
Exp: A Virtual Private Network (VPN) creates a secure, encrypted connection over a less secure network, such as the public internet.

Question 78 of 100

JPEG is a file format commonly used for:

A. Audio files B. Text documents C. Images / Photographs D. Video files

✅ Correct Answer: C
Exp: JPEG (Joint Photographic Experts Group) is a standard image format containing lossy compressed image data.

Question 79 of 100

MP3 is a file format commonly used for:

A. Video B. Images C. Audio D. Documents

✅ Correct Answer: C
Exp: MP3 is an audio coding format for digital audio which uses a form of lossy data compression.

Question 80 of 100

MP4 is a file format commonly used for:

A. Audio only B. Images C. Text D. Video

✅ Correct Answer: D
Exp: MP4 (MPEG-4 Part 14) is a digital multimedia container format most commonly used to store video and audio.

Question 81 of 100

Which of the following is NOT a valid cell reference in MS Excel?

A. A1 B. At1 (@1) C. 1A D. Dollar1 ($1)

✅ Correct Answer: C
Exp: In Excel, the column letter must come before the row number. So, A1 is valid, but 1A is invalid.

Question 82 of 100

What does BIOS stand for?

A. Basic Input Output System B. Broad Internal Output System C. Binary Input Output Software D. Basic Internal Output System

✅ Correct Answer: A
Exp: BIOS (Basic Input/Output System) is firmware used to perform hardware initialization during the booting process of a computer.

Question 83 of 100

The process of loading the operating system into the computer's memory is called:

A. Installing B. Formatting C. Booting D. Debugging

✅ Correct Answer: C
Exp: Booting is the process of starting up a computer and loading the operating system into RAM.

Question 84 of 100

SSD stands for:

A. Solid Storage Drive B. Solid State Drive C. Super Storage Disk D. Standard State Drive

✅ Correct Answer: B
Exp: Solid State Drive (SSD) is a new generation of storage device used in computers that uses flash-based memory, making it much faster than a traditional HDD.

Question 85 of 100

HDD stands for:

A. High Definition Drive B. Hard Disk Drive C. Heavy Data Disk D. Hard Data Drive

✅ Correct Answer: B
Exp: A Hard Disk Drive (HDD) is an electro-mechanical data storage device that stores digital data using magnetic storage on rotating platters.

Question 86 of 100

Which symbol is used to make a cell reference absolute in MS Excel?

A. Hash (#) B. At (@) C. Dollar ($) D. Ampersand (&)

✅ Correct Answer: C
Exp: The Dollar sign is used in Excel formulas to create an absolute cell reference, locking the row and/or column so it doesn't change when copied.

Question 87 of 100

In MS Office, the spelling and grammar check is initiated by which function key?

A. F5 B. F7 C. F9 D. F12

✅ Correct Answer: B
Exp: Pressing F7 opens the Spelling and Grammar check dialog box in MS Word and other Office applications.

Question 88 of 100

In MS Word, what does Ctrl + W do?

A. Opens a new window B. Closes the current document C. Saves the document D. Prints the document

✅ Correct Answer: B
Exp: Ctrl + W is a common shortcut to close the currently active document or window without closing the entire application.

Question 89 of 100

What is a "Bug" in computer terminology?

A. A virus B. A physical insect in the CPU C. An error or flaw in a software program D. A hardware failure

✅ Correct Answer: C
Exp: A software bug is an error, flaw, or fault in a computer program or system that causes it to produce an incorrect or unexpected result.

Question 90 of 100

The process of finding and fixing errors in a computer program is called:

A. Compiling B. Executing C. Debugging D. Running

✅ Correct Answer: C
Exp: Debugging is the process of detecting and removing existing and potential errors (bugs) in software code.

Question 91 of 100

Which of the following memory is strictly volatile?

A. ROM B. Flash Memory C. RAM D. Hard Disk

✅ Correct Answer: C
Exp: RAM is volatile memory; it loses its contents when the computer is turned off.

Question 92 of 100

1 Megabyte (MB) is equal to:

A. 1024 Bytes B. 1000 KB C. 1024 KB D. 1024 GB

✅ Correct Answer: C
Exp: 1 MB equals 1024 Kilobytes (KB).

Question 93 of 100

1 Gigabyte (GB) is equal to:

A. 1024 KB B. 1024 MB C. 1000 MB D. 1024 TB

✅ Correct Answer: B
Exp: 1 GB equals 1024 Megabytes (MB).

Question 94 of 100

The resolution of a printer is measured in:

A. Pixels B. Megapixels C. DPI (Dots Per Inch) D. Hz

✅ Correct Answer: C
Exp: Printer resolution is measured in DPI (Dots Per Inch). A higher DPI means a sharper, more detailed print.

Question 95 of 100

What is the main function of a motherboard?

A. To display graphics B. To act as the central hub connecting all computer components C. To store files permanently D. To cool down the system

✅ Correct Answer: B
Exp: The motherboard is the main printed circuit board (PCB) that holds and allows communication between all crucial electronic components of the system, such as the CPU and memory.

Question 96 of 100

Which of the following is an output device?

A. Mouse B. Scanner C. Microphone D. Projector

✅ Correct Answer: D
Exp: A projector is an output device that projects an image or video onto a surface. The other options are input devices.

Question 97 of 100

MAC address stands for:

A. Media Access Control address B. Main Access Control address C. Media Authentication Code D. Machine Access Code

✅ Correct Answer: A
Exp: A Media Access Control (MAC) address is a unique identifier assigned to a network interface controller (NIC) for communications on a network.

Question 98 of 100

What is the primary purpose of an Antivirus program?

A. To speed up the internet B. To protect the computer from malicious software C. To create backups D. To design graphics

✅ Correct Answer: B
Exp: Antivirus software is designed to detect, prevent, and remove malicious software (malware) such as viruses, worms, and trojans.

Question 99 of 100

The shortcut key to reboot a computer system using the keyboard is:

A. Ctrl + Shift + Esc B. Ctrl + Alt + Delete C. Alt + Tab D. Windows + D

✅ Correct Answer: B
Exp: Ctrl + Alt + Delete is a keyboard shortcut that can be used to interrupt a function, open the task manager, or reboot the system.

Question 100 of 100

In MS Excel, which feature is used to combine two or more cells into a single cell?

A. Wrap Text B. Format Painter C. Merge & Center D. AutoSum

✅ Correct Answer: C
Exp: "Merge & Center" combines the selected cells into one larger cell and centers the content within the new cell.

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