Computer Science MCQs

What is a Computer?

Definition & Basics

Which of the following best defines a computer?
A. A machine that only stores data
B. An electronic machine that takes input, processes it, and gives output
C. A calculator for solving math problems only
D. A device that only plays games

Which of the following is NOT an example of computer input?
A. Typing on a keyboard
B. Clicking with a mouse
C. Watching a video
D. Speaking into a microphone

Saving your assignment on a USB is an example of:
A. Input
B. Processing
C. Storage
D. Output

Watching YouTube on a laptop is an example of:
A. Input
B. Processing
C. Output
D. Storage

Main Features of a Computer

The term MIPS refers to:
A. Million Instructions Per Second
B. Mega Information Processing System
C. Memory Input Processing Storage
D. Machine Instructions Per Storage

Which feature of a computer allows it to do millions of calculations per second?
A. Accuracy
B. Speed
C. Automation
D. Storage

If you give wrong data to a computer, the output will be wrong. This is called:
A. CPU Error
B. Human Error
C. Garbage In, Garbage Out
D. Logic Fault

Which feature of a computer lets it store huge amounts of data for future use?
A. Automation
B. Storage
C. Multitasking
D. Accuracy

Printing 100 pages without user help after one command is an example of:
A. Automation
B. Multitasking
C. Accuracy
D. Speed

Listening to music while typing and browsing at the same time is an example of:
A. Automation
B. Accuracy
C. Multitasking
D. Storage

Basic Parts of a Computer

Which of the following is hardware?
A. MS Word
B. Google Chrome
C. Keyboard
D. Windows 11

Software refers to:
A. Physical parts of a computer
B. Devices used for input and output
C. Programs that give instructions to hardware
D. Storage media

Input Devices

Which device is used for typing letters and numbers?
A. Mouse
B. Keyboard
C. Scanner
D. Monitor

The device that converts printed text into digital form is:
A. Webcam
B. Scanner
C. Microphone
D. Printer

A microphone is used to:
A. Enter sound into the computer
B. Output audio from the computer
C. Record video
D. Scan documents

A webcam is used to input:
A. Sound
B. Video or images
C. Text only
D. Files from a USB

CPU (Central Processing Unit)

CPU is also known as the:
A. Storage hub
B. Brain of the computer
C. Memory center
D. Control storage unit

Which part of the CPU performs mathematical and logical operations?
A. CU
B. ALU
C. Registers
D. ROM

The part of the CPU that controls all parts of the computer is:
A. ALU
B. CU
C. Register
D. BIOS

Which CPU component stores small amounts of data for quick access?
A. Registers
B. ALU
C. CU
D. Cache

Output Devices

Which device displays images and videos like a TV screen?
A. Projector
B. Printer
C. Monitor
D. Speaker

Which device prints documents and pictures on paper?
A. Monitor
B. Printer
C. Projector
D. Scanner

Which device outputs sound from a computer?
A. Microphone
B. Speaker
C. Projector
D. Webcam

Which device displays a computer screen on a large wall?
A. Monitor
B. Projector
C. Printer
D. Scanner

Storage Devices

Which of the following is not a storage device?
A. Hard Drive
B. USB Flash Drive
C. DVD
D. Mouse

What is the maximum capacity of a standard hard drive mentioned in the content?
A. 700 MB
B. 4 TB or more
C. 256 GB
D. 128 GB

A DVD can store up to:
A. 4.7 GB
B. 128 GB
C. 256 GB
D. 2 GB

Memory cards are usually:
A. Permanent storage
B. Portable storage
C. Output devices
D. CPU components

Types of Computers

Which type of computer is used by banks to process large amounts of data?
A. Personal computer
B. Mainframe computer
C. Supercomputer
D. Tablet

Which type of computer is the most powerful and used for weather forecasting?
A. Mainframe
B. Laptop
C. Supercomputer
D. Personal computer

A smartphone is an example of a:
A. Mainframe computer
B. Tablet/small computer
C. Supercomputer
D. Microprocessor

Uses of Computers

Using a computer for online learning and research falls under:
A. Business
B. Education
C. Banking
D. Healthcare

ATM services are an example of computers used in:
A. Healthcare
B. Banking
C. Education
D. Entertainment

Watching movies and playing games is a computer use in:
A. Science & Technology
B. Education
C. Entertainment
D. Business

Storing patient data in a hospital is an example of:
A. Entertainment
B. Banking
C. Healthcare
D. Education

Importance of Learning Computers

Which is not a reason why learning computers is important?
A. Writing assignments
B. Applying for jobs
C. Cooking food
D. Doing research

Which statement is correct about computers today?
A. They are rarely used in offices
B. They are an essential part of daily life
C. They are only for scientists
D. They work only with the internet