100+ Computer Questions and Answers for School and Entry-Level Learning

Hardware refers to the physical parts of a computer like the CPU, monitor, keyboard, and mouse.

Hardware helps the computer receive input, process data, and show the result on screen.

Examples include the hard disk, RAM, keyboard, monitor, and motherboard.

SSDs are faster and lighter, while HDDs are slower but cheaper with more storage.

There are many parts, but common ones include CPU, RAM, monitor, keyboard, and mouse.

For daily use, 4GB–8GB is enough. For gaming or editing, 16GB or more is better.

Yes, a printer is a hardware device used to print documents from a computer.

RAM is hardware. It temporarily stores data your computer uses while working.

The CPU is the brain of the computer. It handles all processing tasks.

No, hardware needs software to run and perform any function properly.

Computer software is a group of programs and instructions that tell the hardware what to do. It cannot be touched like hardware but is needed for the computer to work.

There are mainly two types: system software and application software. System software runs the computer, while application software helps you do tasks like writing or browsing.

Windows is a type of system software called an operating system. It manages computer functions and lets you use programs and files easily.

System software controls the hardware and runs the computer’s basic tasks. Examples include Windows, Linux, and macOS.

Application software helps users perform specific tasks like editing photos, making documents, or browsing websites. MS Word and Google Chrome are good examples.

No, without software, the hardware can’t work or understand what to do. Both software and hardware are needed for a computer to function properly.

Yes, antivirus is application software that protects your computer from harmful programs. It helps detect and remove viruses or malware.

Hardware is the physical part of a computer like the monitor or keyboard. Software is the program that runs inside and controls how the hardware works.

An input device is used to enter data or instructions into the computer. Common examples include a keyboard, mouse, and microphone.

Output devices show the result of processed data from the computer. Monitors, printers, and speakers are examples of output devices.

A scanner is an input device that takes printed images or text and converts them into digital form. It helps you transfer documents into the computer.

A speaker is an output device because it produces sound based on the computer’s data. It lets you hear music, videos, or notifications.

A touch screen works as both input and output. It shows display (output) and also accepts finger touch as input.

Input devices allow users to type, click, or speak to send instructions to the computer. Without input, a computer cannot receive data.

Monitors, printers, and speakers are widely used output devices. They show visual, printed, or audio output from the computer.

Yes, a webcam captures video and sends it into the computer. It is used for video calls, recordings, and surveillance.

A storage device is any hardware used to store data permanently or temporarily. It allows users to save files, documents, and applications.

Examples include hard drives, SSDs, pen drives, CDs, and memory cards. These devices help store digital data for later use.

RAM is temporary memory used while the computer is running. A hard drive stores data permanently until you delete it.

A pen drive is a portable storage device used to transfer files between computers. It connects through a USB port and stores data easily.

SSDs are faster, quieter, and more durable, but cost more. HDDs are slower but offer more space at a lower price.

Yes, CD-ROM is an optical storage device used to read data from CDs. It was common before USB drives and cloud storage.

Cloud storage lets you save files online using the internet. Services like Google Drive and Dropbox offer free and paid storage.

Yes, most modern games can be stored and played from external hard drives. This helps free up space on your main drive.

Computer memory stores data temporarily or permanently to help the system work. It allows the CPU to access information faster during tasks.

The two main types are RAM and ROM. RAM is temporary memory, while ROM stores permanent startup data.

RAM stores the data and programs you’re currently using. It helps your computer run faster and handle multiple tasks.

ROM holds the instructions needed to start the computer. These instructions stay even when the power is off.

Cache memory is a small, fast memory inside the CPU. It stores frequently used data to speed up processing.

For simple tasks, 4GB is fine. For heavy use like gaming or video editing, 8GB or more is better.

Memory is hardware because it’s a physical part of the system. It includes chips and modules inside your computer.

Yes, you can usually upgrade RAM to improve speed. Many laptops and desktops allow RAM upgrades.

The internet is a global system that connects millions of computers. It allows people to browse, communicate, and share data worldwide.

Networking is linking two or more devices to share data or resources. It can be done using cables or wireless signals.

Wi-Fi is wireless internet that connects devices like phones and laptops. It allows users to go online without wires.

A router sends internet signals to different devices. It connects computers, phones, and TVs to the same network.

An IP address is a unique number for each device on a network. It helps computers identify and talk to each other.

A modem brings internet into your home or office. It connects to your internet service provider and your router.

LAN stands for Local Area Network. It connects computers in a small space like a room, school, or office.

WWW stands for World Wide Web. It is the system of websites and content you access through the internet.

A keyboard is used to type letters, numbers, and symbols into the computer. It also lets users use shortcuts and commands.

Function keys are labeled F1 to F12 on the keyboard. They perform special tasks like refreshing a page or opening help.

Ctrl + C is a shortcut for copying selected text or files. It saves time compared to right-clicking and choosing copy.

The spacebar creates a space between words when typing. It is the longest key on the keyboard.

The Enter key is used to move to a new line or confirm an action. It plays a major role in submitting commands.

The Backspace key deletes the character before the cursor. It helps fix typing errors quickly.

Ctrl + V pastes the copied content into the document or field. It’s the computer keyboard shortcut used after Ctrl + C.

The Shift key is used to type capital letters and symbols. It works with other keys to create special characters.

Arrow keys move the cursor up, down, left, or right. They help navigate through text or documents.

Computer security means protecting your data and system from viruses, hackers, and cyber-attacks. It helps keep your information safe and private.

Viruses, spyware, ransomware, phishing emails, and hacking are common threats. These can damage your system or steal information.

Antivirus is a program that detects and removes harmful files like viruses or malware. It protects your computer from unwanted threats.

A strong password has letters, numbers, and symbols and is hard to guess. It helps protect your online accounts from being hacked.

A firewall is a security tool that blocks unauthorized access to your network. It acts like a shield between your computer and the internet.

Software updates fix bugs and patch security holes. Regular updates help protect your computer from new threats.

Phishing is when hackers try to trick you into giving personal info through fake emails or websites. Always check links and sources before clicking.

Use strong passwords, avoid suspicious links, install antivirus, and don’t share personal info on unknown websites.

Computer programming is writing instructions that tell a computer what to do. It’s used to create software and apps.

A programming language is a special way to write computer instructions. Examples include Python, Java, and C++.

Coding is used to make websites, apps, games, and more. It helps build the software we use every day.

Coding means writing code, while programming includes planning, testing, and debugging. Programming is the full process.

HTML is a markup language, not a true programming language. It is used to create and design web pages.

Yes, many simple languages like Scratch and Python are great for beginners. There are also free tools and apps to practice coding.

A compiler translates the code you write into a language the computer understands. It helps run programs correctly.

Coding improves problem-solving and logic skills. It also opens career opportunities in tech, software, and web development.

An operating system is software that controls the computer and allows you to use it. It manages files, programs, and connected devices.

Windows, macOS, Linux, Android, and iOS are popular examples. They work on computers, tablets, and smartphones.

The OS helps manage files, run programs, and connect hardware. It acts like a bridge between you and the computer.

Yes, Windows is one of the most widely used operating systems. It offers a user-friendly interface and supports many applications.

Windows is paid and easy to use. Linux is mostly free, open-source, and popular among developers.

No, the operating system is required for basic tasks. Without it, the computer can’t run programs or respond to commands.

The OS lets you use apps, manage files, and call or text. Android and iOS are the most common mobile operating systems.

GUI means Graphical User Interface. It uses icons and windows so users can interact with the OS more easily.

Charles Babbage is known as the “Father of the Computer.” He designed the first mechanical computer in the 1800s.

First-generation computers used vacuum tubes and were very large. They were slow and used from 1940 to 1956.

Second-generation computers used transistors instead of vacuum tubes. They were faster and smaller than the first generation.

 The five generations are based on technology: vacuum tubes, transistors, integrated circuits, microprocessors, and AI.

 ENIAC was one of the first electronic general-purpose computers. It was huge and used during World War II.

Old computers were large and slow with limited memory. Modern computers are small, fast, and much more powerful.

A supercomputer is a very powerful computer used for complex tasks. It’s used in weather forecasting, science, and research.

 It helps us understand how far technology has come. It also shows how computers evolved to become faster and smarter.

CPU means Central Processing Unit. It’s the brain of the computer that processes all instructions.

RAM stands for Random Access Memory. It is used to store temporary data while the computer is working.

ROM means Read-Only Memory. It stores permanent instructions needed to start the computer.

USB stands for Universal Serial Bus. It is used to connect devices like pen drives and keyboards to the computer.

 HTTP stands for HyperText Transfer Protocol. It is used for transferring web pages on the internet.

HTML stands for HyperText Markup Language. It is used to create the structure of web pages.

Wi-Fi stands for Wireless Fidelity. It allows devices to connect to the internet without cables.

URL stands for Uniform Resource Locator. It is the address used to access websites on the internet.

Online safety keeps your personal information, identity, and files protected. It helps prevent cyberbullying, scams, and hacking.

Cyberbullying is bullying done using digital devices like phones or computers. It includes sending mean messages or spreading rumors online.

Not copying someone’s work, using legal software, and respecting others online are examples. Always ask before sharing someone else’s data.

Plagiarism means copying content from someone else and claiming it as your own. It’s considered cheating and is not ethical.

Avoid logging into important accounts or sharing personal info. Use VPNs and secure websites when on public Wi-Fi.

Don’t respond and take screenshots. Block the person and report them to the website or local authorities.

Everyone has the right to keep their personal data private. Sharing or spying without permission is both unsafe and unethical.

Computer ethics are rules for using computers fairly and honestly. They include respecting privacy and not stealing data.