Computer One Liner MCQs 300+ Important Computer MCQs.

COMPUTER ONE LINER MCQS

Computer One Liner MCQs 300+ Important Computer MCQs help students quickly review essential IT concepts for exams. Computers are the backbone of modern technology, and understanding their basics is crucial for every learner. These concise one-liner questions cover topics like computer hardware, software, networking, storage, programming, and operating systems. Each question is designed to strengthen your knowledge for competitive tests such as PPSC, FPSC, NTS, CSS, and other entry-level exams. Moreover, practicing these MCQs daily will enhance your problem-solving speed and memory recall. In addition, focusing on short, concept-based questions ensures better preparation for computer literacy sections found in almost every test today. In conclusion, this collection is an excellent resource for students and professionals seeking quick computer knowledge revision.

20 Basic Computer One Liner MCQs

What is the main storage device of a computer?
Answer: Hard Disk
Which device is used to store permanent data?
Answer: ROM
What is the full form of HDD?
Answer: Hard Disk Drive
What is the full form of SSD?
Answer: Solid State Drive
What type of memory is faster than RAM?
Answer: Cache Memory
What is the primary storage device?
Answer: Main Memory
What is the secondary storage device?
Answer: External Hard Drive
What is the function of a UPS?
Answer: Provides backup power
What is the full form of USB?
Answer: Universal Serial Bus
What device reads optical disks?
Answer: CD/DVD Drive
What is used to store large backups?
Answer: Magnetic Tape
What is the main function of cache memory?
Answer: To speed up CPU processing
What does RAID stand for?
Answer: Redundant Array of Independent Disks
What type of storage is a pen drive?
Answer: Flash Storage
What is the capacity of a standard CD?
Answer: 700 MB
What is the capacity of a standard DVD?
Answer: 4.7 GB
What type of device is a printer?
Answer: Output Device
Which device is both input and output?
Answer: Touchscreen
What is the purpose of a sound card?
Answer: To process audio signals
Which part stores the BIOS settings?
Answer: CMOS Battery

Learning about hardware and storage devices helps you understand how data is handled and preserved in a system. These one-liner MCQs build strong fundamental knowledge for students appearing in computer-based tests. In addition, mastering hardware terminology enhances your confidence during technical interviews and IT exams. Practice daily to recall memory types, storage units, and functions effectively.

Hardware & CPU Section

What does CPU stand for?
Answer: Central Processing Unit
What is the brain of the computer?
Answer: CPU
Which unit performs arithmetic operations?
Answer: ALU (Arithmetic Logic Unit)
What is the control unit responsible for?
Answer: Directing all computer operations
What is the full form of GPU?
Answer: Graphics Processing Unit
Which part of the computer performs calculations?
Answer: ALU
What does RAM stand for?
Answer: Random Access Memory
What does ROM stand for?
Answer: Read Only Memory
What type of memory is volatile?
Answer: RAM
Which memory stores data permanently?
Answer: ROM
What is the full form of BIOS?
Answer: Basic Input Output System
What is the full form of POST?
Answer: Power On Self Test
What is the function of the motherboard?
Answer: To connect all computer components
Which port is used to connect a monitor?
Answer: VGA or HDMI
What is the main function of the CPU fan?
Answer: To cool down the processor
What does CMOS stand for?
Answer: Complementary Metal Oxide Semiconductor
What type of device is a keyboard?
Answer: Input Device
Which device displays output visually?
Answer: Monitor
What is the full form of LED?
Answer: Light Emitting Diode
What is the full form of LCD?
Answer: Liquid Crystal Display

Understanding the central components of a computer system, including the CPU, memory, and motherboard, is essential for students preparing for IT-based exams. These Computer One Liner MCQs help learners quickly review how input, processing, and output work together. Additionally, focusing on terms like BIOS, GPU, and RAM enhances your technical vocabulary for PPSC, FPSC, and NTS tests. Practicing these hardware-related MCQs improves comprehension of device roles, performance, and internal functions. In conclusion, mastering this section lays the foundation for deeper computer knowledge and system-level understanding.

Software & Operating System

What is software?
Answer: A set of instructions that tell a computer what to do
What are the two main types of software?
Answer: System software and application software
What is the main function of an operating system?
Answer: To manage hardware and software resources
Which operating system is developed by Microsoft?
Answer: Windows
Which operating system is open-source?
Answer: Linux
What is the full form of GUI?
Answer: Graphical User Interface
What does DOS stand for?
Answer: Disk Operating System
Which OS is used in Apple computers?
Answer: macOS
What is multitasking in computing?
Answer: Running multiple programs simultaneously
What is the kernel of an OS?
Answer: The core that manages system operations
Which type of software controls the hardware directly?
Answer: System Software
What is the main purpose of application software?
Answer: To perform specific user tasks
What is the full form of API?
Answer: Application Programming Interface
What is the main function of drivers?
Answer: To allow hardware and OS to communicate
What is the extension of an executable file in Windows?
Answer: .exe
What does open-source software mean?
Answer: Software with freely available source code
What is a file system?
Answer: A method to organize and store data on a disk
What is an example of system software?
Answer: Operating System
What is an example of application software?
Answer: MS Word
What is a utility program?
Answer: A tool that helps maintain and manage the computer

Software and operating systems are the core of computer performance. These Computer One Liner MCQs cover key terms like GUI, kernel, API, and drivers to explain how systems manage hardware and applications. Moreover, system software maintains smooth operations, while application software boosts user productivity. In addition, understanding multitasking and open-source systems strengthens computer knowledge for exams and interviews.

Networking & Internet

What does LAN stand for?
Answer: Local Area Network
What does WAN stand for?
Answer: Wide Area Network
What is the full form of Wi-Fi?
Answer: Wireless Fidelity
What does IP stand for?
Answer: Internet Protocol
What does URL stand for?
Answer: Uniform Resource Locator
What is a modem used for?
Answer: To connect a computer to the internet
What does HTTP stand for?
Answer: Hypertext Transfer Protocol
What is the secure version of HTTP?
Answer: HTTPS
What is an IP address?
Answer: A unique number assigned to each device on a network
What does ISP stand for?
Answer: Internet Service Provider
What is the full form of DNS?
Answer: Domain Name System
What is a router used for?
Answer: To forward data between networks
What is a switch used for?
Answer: To connect devices within a LAN
What does FTP stand for?
Answer: File Transfer Protocol
What is the use of a firewall?
Answer: To protect the network from unauthorized access
What does VPN stand for?
Answer: Virtual Private Network
What is bandwidth?
Answer: The amount of data transferred in a given time
What is the full form of SMTP?
Answer: Simple Mail Transfer Protocol
What is the full form of WWW?
Answer: World Wide Web
What does HTML stand for?
Answer: Hypertext Markup Language

Computer networking connects systems for data sharing and communication. These Computer One Liner MCQs cover essential networking terms like LAN, WAN, IP, DNS, and VPN, commonly found in competitive exams. Understanding network hardware such as routers, switches, and modems helps you grasp how information travels securely across the internet. Moreover, familiarizing yourself with protocols like HTTP, FTP, and SMTP enhances your technical awareness for IT-based tests. In addition, regular revision of these networking questions builds a strong foundation for computer professionals and students alike.

MS Office & Productivity Software

What does MS Word stand for?
Answer: Microsoft Word
What does MS Excel stand for?
Answer: Microsoft Excel
What does MS PowerPoint stand for?
Answer: Microsoft PowerPoint
What is the extension of a Word document?
Answer: .docx
What is the extension of an Excel file?
Answer: .xlsx
What is the shortcut to copy in MS Word?
Answer: Ctrl + C
What is the shortcut to paste in MS Word?
Answer: Ctrl + V
What is the shortcut to cut text?
Answer: Ctrl + X
What is the shortcut to save a file?
Answer: Ctrl + S
What is the shortcut to open a new document?
Answer: Ctrl + N
What is the function of MS Excel?
Answer: To create and manage spreadsheets
What is the use of MS PowerPoint?
Answer: To create presentations
What is the shortcut for print command?
Answer: Ctrl + P
What is the shortcut for undo command?
Answer: Ctrl + Z
What is the shortcut for redo command?
Answer: Ctrl + Y
What does slide transition mean in PowerPoint?
Answer: Animation between slides
What is the default font in MS Word?
Answer: Calibri
What is the default file extension for PowerPoint?
Answer: .pptx
What is the purpose of spell check in Word?
Answer: To correct spelling mistakes
What is the function of a chart in Excel?
Answer: To represent data graphically

MS Office applications are essential tools in modern workplaces and exams. These Computer One Liner MCQs cover shortcuts, file extensions, and key functions of Word, Excel, and PowerPoint. Furthermore, mastering basic commands improves your efficiency in office automation tasks. These questions are highly useful for PPSC, NTS, and computer operator tests. Regularly practicing these one-liners builds confidence, enhances typing speed, and boosts familiarity with common Microsoft Office functions.

Internet & Email Basics

What does email stand for?
Answer: Electronic Mail
What is the protocol used to send emails?
Answer: SMTP
What is the protocol used to receive emails?
Answer: POP3
What does IMAP stand for?
Answer: Internet Message Access Protocol
What is the main function of a web browser?
Answer: To access and display web pages
What is an example of a web browser?
Answer: Google Chrome
What does URL stand for?
Answer: Uniform Resource Locator
What is the use of a search engine?
Answer: To find information on the internet
What is an example of a search engine?
Answer: Google
What is the full form of HTTP?
Answer: Hypertext Transfer Protocol
What is the full form of HTTPS?
Answer: Hypertext Transfer Protocol Secure
What is the main function of cookies in browsers?
Answer: To store user preferences and login data
What is cloud computing?
Answer: Storing and accessing data over the internet
What is an example of cloud storage service?
Answer: Google Drive
What does ISP stand for?
Answer: Internet Service Provider
What does IP address identify?
Answer: A device on a network
What is the full form of DNS?
Answer: Domain Name System
What is phishing?
Answer: A fraud attempt to steal personal data online
What is spam?
Answer: Unwanted or junk email messages
What is a domain name?
Answer: A unique name identifying a website

Understanding internet and email fundamentals is crucial for both students and professionals. These Computer One Liner MCQs simplify complex terms like IP, DNS, SMTP, and cloud computing. Moreover, learning about phishing, spam, and HTTPS enhances digital safety awareness. Practicing these questions regularly improves your general computer knowledge for exams and daily use. In addition, mastering browser functions and email protocols ensures strong computer literacy for office or online communication.

Operating Systems & Commands

What is the main function of an operating system?
Answer: To manage computer hardware and software
What does GUI stand for?
Answer: Graphical User Interface
What is the full form of DOS?
Answer: Disk Operating System
Which OS is developed by Microsoft?
Answer: Windows
Which OS is used on Apple computers?
Answer: macOS
What is the open-source operating system?
Answer: Linux
What does multitasking mean?
Answer: Running multiple programs at the same time
What does booting mean?
Answer: Starting up a computer
What is the full form of BIOS?
Answer: Basic Input Output System
What is the full form of POST?
Answer: Power-On Self Test
What is the command to list files in Windows CMD?
Answer: dir
What is the command to change directory in CMD?
Answer: cd
What is the command to remove a file in CMD?
Answer: del
What is the full form of CLI?
Answer: Command Line Interface
What is a file extension of batch files?
Answer: .bat
What is the shortcut key to open Task Manager?
Answer: Ctrl + Shift + Esc
What is the shortcut key to refresh a window?
Answer: F5
What is the shortcut key to rename a file?
Answer: F2
What is Safe Mode?
Answer: A diagnostic mode for troubleshooting
What is the recycle bin used for?
Answer: To store deleted files temporarily

Operating systems manage all computer processes and resources. These Computer One Liner MCQs focus on Windows, macOS, and Linux, along with command line basics. Moreover, understanding booting, file management, and troubleshooting terms like Safe Mode or BIOS builds technical confidence. Regular revision of these OS MCQs helps in computer operator exams and IT-related interviews. In addition, these key concepts form the foundation for managing and maintaining any computing system efficiently.

Programming & Logic

What does C stand for in C language?
Answer: It doesn’t stand for anything; it’s just a name
Who developed the C language?
Answer: Dennis Ritchie
What is the full form of HTML?
Answer: Hypertext Markup Language
What is the full form of CSS?
Answer: Cascading Style Sheets
What is the full form of JS?
Answer: JavaScript
What is a programming language?
Answer: A language used to write software programs
What is a compiler?
Answer: A program that translates source code into machine code
What is an algorithm?
Answer: A step-by-step procedure to solve a problem
What is debugging?
Answer: Finding and fixing errors in code
What is a variable?
Answer: A storage location identified by a name
What is the full form of SQL?
Answer: Structured Query Language
What is the function of SQL?
Answer: To manage and retrieve data from databases
What is the full form of OOP?
Answer: Object-Oriented Programming
What is a loop in programming?
Answer: A sequence that repeats until a condition is met
What is an array?
Answer: A collection of similar data elements
What is a function?
Answer: A block of reusable code
What is a database?
Answer: An organized collection of data
What is the full form of DBMS?
Answer: Database Management System
What is open-source programming?
Answer: Code available for modification and redistribution
What is pseudocode?
Answer: A simplified form of programming logic written in plain language

Programming languages form the base of software development. These Computer One Liner MCQs cover key terms like compiler, algorithm, SQL, and debugging. Moreover, they build logical reasoning and coding confidence for beginners. In addition, knowledge of HTML, CSS, and JavaScript enhances web development skills, making this section perfect for IT students and exam preparation.

Cybersecurity & Internet Safety

What does cybercrime mean?
Answer: Crime committed using computers or the internet
What is hacking?
Answer: Unauthorized access to computer systems
What is phishing?
Answer: Fraudulent emails to steal information
What does malware mean?
Answer: Malicious software designed to harm systems
What is a virus?
Answer: A program that infects and damages files
What is a worm?
Answer: A self-replicating malware that spreads automatically
What is a Trojan horse?
Answer: Malware disguised as legitimate software
What is ransomware?
Answer: Malware that locks data until ransom is paid
What does antivirus software do?
Answer: Detects and removes malware
What is a firewall?
Answer: A security system that blocks unauthorized access
What is encryption?
Answer: Converting data into unreadable format for security
What is decryption?
Answer: Converting encrypted data back to readable form
What is two-factor authentication?
Answer: A security method requiring two verification steps
What does VPN stand for?
Answer: Virtual Private Network
What is a digital signature?
Answer: An encrypted mark to verify authenticity
What is a CAPTCHA used for?
Answer: To verify human users online
What is cyberbullying?
Answer: Online harassment or abuse
What is data privacy?
Answer: Protecting personal information online
What is the full form of HTTPS?
Answer: Hypertext Transfer Protocol Secure
What is the main purpose of cybersecurity?
Answer: To protect data and networks from threats

Cybersecurity ensures the protection of systems and data from online threats. These Computer One Liner MCQs highlight essential concepts like malware, firewalls, encryption, and VPNs. Moreover, learning about phishing, ransomware, and digital signatures helps build awareness for safe digital behavior. Practicing these one-liners regularly improves exam readiness and real-world online security knowledge. In addition, understanding cybercrime prevention is crucial for all modern computer users and IT professionals.

Database & Data Handling

What is data?
Answer: Raw facts and figures
What is information?
Answer: Processed and organized data
What is a database?
Answer: A collection of related data stored electronically
What is the full form of DBMS?
Answer: Database Management System
What is the main function of a DBMS?
Answer: To manage and organize data efficiently
What is the full form of SQL?
Answer: Structured Query Language
What does SELECT command do in SQL?
Answer: Retrieves data from a database
What does INSERT command do in SQL?
Answer: Adds data to a database
What does DELETE command do in SQL?
Answer: Removes data from a table
What is a table in a database?
Answer: A structure to store data in rows and columns
What is a field?
Answer: A column in a database table
What is a record?
Answer: A row in a database table
What is a primary key?
Answer: A unique identifier for each record
What is a foreign key?
Answer: A field linking two tables
What is normalization?
Answer: Organizing data to reduce redundancy
What is a query?
Answer: A request for specific data from a database
What is a form in DBMS?
Answer: A user interface for data entry
What is a report in DBMS?
Answer: A formatted output of database information
What is relational database?
Answer: Database based on table relationships
What is a database server?
Answer: A computer providing database services to others

Databases are essential for storing and managing data effectively. These Computer One Liner MCQs cover topics like SQL, keys, normalization, and queries. Moreover, understanding how databases function helps in exams and professional IT roles. In addition, familiarity with DBMS improves your ability to handle data-driven systems efficiently.

Computer History & Generations

Who is known as the Father of Computers?
Answer: Charles Babbage
Who invented the Analytical Engine?
Answer: Charles Babbage
Who is known as the Father of the Internet?
Answer: Vint Cerf
Who is the inventor of the World Wide Web?
Answer: Tim Berners-Lee
What is the full form of ENIAC?
Answer: Electronic Numerical Integrator and Computer
Which was the first mechanical computer?
Answer: Analytical Engine
Which was the first electronic computer?
Answer: ENIAC
Which was the first high-level programming language?
Answer: FORTRAN
What does IBM stand for?
Answer: International Business Machines
What is the full form of UNIVAC?
Answer: Universal Automatic Computer
Which generation used vacuum tubes?
Answer: First Generation
Which generation used transistors?
Answer: Second Generation
Which generation used integrated circuits?
Answer: Third Generation
Which generation used microprocessors?
Answer: Fourth Generation
What is the fifth generation based on?
Answer: Artificial Intelligence
Who is known as the Father of Artificial Intelligence?
Answer: John McCarthy
When was the first computer invented?
Answer: 1946
Which company introduced the first personal computer?
Answer: IBM
What does AI stand for?
Answer: Artificial Intelligence
What is the full form of ICT?
Answer: Information and Communication Technology

These Computer One Liner MCQs explain the evolution of computers, from the first vacuum tube machines to modern AI systems. Moreover, understanding terms like ENIAC, UNIVAC, and ICT strengthens your basic computer knowledge. In addition, this historical overview is vital for competitive exams and interviews, helping students quickly grasp how technology evolved across generations.

Storage & Memory

What is primary memory?
Answer: Memory directly accessed by CPU
What is secondary memory?
Answer: External or backup storage memory
What is the full form of RAM?
Answer: Random Access Memory
What is the full form of ROM?
Answer: Read Only Memory
What is cache memory?
Answer: High-speed memory between CPU and RAM
What is virtual memory?
Answer: Part of the hard drive used as RAM
What is a hard disk?
Answer: A magnetic data storage device
What is the full form of SSD?
Answer: Solid State Drive
What is an optical disk?
Answer: A disk that stores data using lasers
Example of an optical disk?
Answer: CD or DVD
What is flash memory?
Answer: Non-volatile storage memory
What is the storage capacity of a CD?
Answer: Around 700 MB
What is the storage capacity of a DVD?
Answer: Around 4.7 GB
What is the storage capacity of a Blu-ray disk?
Answer: Around 25 GB
What is the full form of BIOS?
Answer: Basic Input Output System
What is the use of CMOS?
Answer: To store BIOS settings
What is a memory card?
Answer: Portable storage device used in cameras or phones
What is data backup?
Answer: Copying data to prevent loss
What is data recovery?
Answer: Restoring lost or corrupted data
What is a bit?
Answer: The smallest unit of data

Storage and memory are the backbone of computer performance. These Computer One Liner MCQs cover RAM, ROM, SSD, and hard drives. Moreover, understanding capacities, cache, and virtual memory improves your grasp of data management. In addition, practicing these MCQs helps prepare for computer operator, data entry, and IT support exams effectively.

Input & Output Devices

What is an input device?
Answer: A device used to enter data into a computer
What is an output device?
Answer: A device used to display or produce information
Example of an input device?
Answer: Keyboard
Example of an output device?
Answer: Monitor
What is the full form of VDU?
Answer: Visual Display Unit
What is a pointing device?
Answer: A device used to control a pointer on the screen
Example of a pointing device?
Answer: Mouse
What is a joystick used for?
Answer: Gaming and controlling simulations
What is a scanner used for?
Answer: Converting images or documents into digital form
What is OCR?
Answer: Optical Character Recognition
What is a barcode reader used for?
Answer: Reading product codes
What is a microphone used for?
Answer: Capturing audio input
What is a printer used for?
Answer: Producing hard copies of digital documents
What is a plotter used for?
Answer: Printing large graphics and drawings
What is a monitor?
Answer: A screen that displays computer output
What is the full form of LED?
Answer: Light Emitting Diode
What is the full form of LCD?
Answer: Liquid Crystal Display
What is the full form of CRT?
Answer: Cathode Ray Tube
What is a projector used for?
Answer: Displaying computer output on large screens
What is a touch screen?
Answer: Both input and output device

Input and output devices form the core of human-computer interaction. These Computer One Liner MCQs enhance knowledge about devices like monitors, scanners, and printers. Moreover, understanding OCR, LED, and touch technology helps in technical and general IT exams. In addition, mastering this section boosts your awareness of hardware and system functionality.

Cloud Computing & Networking

What is cloud computing?
Answer: Delivering services over the internet
What are examples of cloud platforms?
Answer: AWS, Google Cloud, Azure
What does SaaS stand for?
Answer: Software as a Service
What does PaaS stand for?
Answer: Platform as a Service
What does IaaS stand for?
Answer: Infrastructure as a Service
What is the full form of LAN?
Answer: Local Area Network
What is the full form of WAN?
Answer: Wide Area Network
What is the full form of MAN?
Answer: Metropolitan Area Network
What is a modem?
Answer: A device that converts digital signals to analog and vice versa
What is a router?
Answer: A device that directs data between networks
What is an IP address?
Answer: A unique number assigned to each device on a network
What is Wi-Fi?
Answer: Wireless Fidelity
What is Bluetooth used for?
Answer: Short-range wireless communication
What is a hotspot?
Answer: A place where Wi-Fi internet is available
What is a server?
Answer: A computer that provides resources to other computers
What is a client?
Answer: A computer that requests services from a server
What is a network switch?
Answer: A device that connects devices within a network
What is a firewall?
Answer: Network security system that filters traffic
What is bandwidth?
Answer: The amount of data transmitted in a given time
What is a protocol?
Answer: A set of rules for data communication

Networking and cloud computing connect systems globally. These Computer One Liner MCQs explain LAN, WAN, IP, and cloud models like SaaS, PaaS, and IaaS. Moreover, they strengthen understanding of routers, servers, and firewalls. In addition, mastering these concepts improves IT exam readiness and practical computer knowledge for professionals.

AI, Software & IT Awareness

What does AI stand for?
Answer: Artificial Intelligence
What is machine learning?
Answer: Training computers to learn from data
What is deep learning?
Answer: AI method using neural networks
What is robotics?
Answer: The science of designing robots
What is automation?
Answer: Using technology to perform tasks automatically
What is natural language processing?
Answer: AI’s ability to understand human language
What is virtual reality?
Answer: Simulated computer environment
What is augmented reality?
Answer: Digital information overlaid on real-world view
What is a chatbot?
Answer: An AI program that interacts with users
What is data mining?
Answer: Extracting useful information from data
What is Big Data?
Answer: Large and complex data sets
What is blockchain?
Answer: A secure distributed digital ledger
What is cryptocurrency?
Answer: Digital currency using cryptography
What is e-commerce?
Answer: Buying and selling goods online
What is fintech?
Answer: Financial technology services
What is digital marketing?
Answer: Promoting products through online platforms
What is SEO?
Answer: Search Engine Optimization
What is SEM?
Answer: Search Engine Marketing
What is content management system?
Answer: A platform to create and manage digital content
What is WordPress?
Answer: An open-source CMS used for websites and blogs

This section of Computer One Liner MCQs highlights modern innovations like AI, blockchain, and SEO. Moreover, it helps readers stay updated on current IT trends and digital transformation topics. In addition, understanding these emerging technologies improves job readiness and competitive exam performance. These one-liners complete your 300-question set perfectly for computer awareness preparation.

Conclusion

This section explored computer hardware and storage concepts, covering memory types, devices, and storage capacity. These MCQs are perfect for those preparing for PPSC, FPSC, and IT-related exams. Continue to the next step to test your knowledge of software and operating systems—the heart of computer functionality.

FAQS

Q1: What is the main difference between HDD and SSD?
SSD is faster and uses flash memory, while HDD relies on magnetic disks.

Q2: Which storage device provides temporary data?
RAM stores temporary data during computer operations.

Q3: Why should students study computer hardware MCQs?
Because it helps them understand real-world applications and boosts exam scores

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