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MCQs — Computer Systems

Practice questions for Computer Science.

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Question 61

A company wants employees to record attendance using a unique physical feature of each person. Which device fits best?

A. Speaker

B. Fingerprint scanner

C. Plotter

D. Projector

Question 62

Which output device produces a permanent copy of information on paper?

A. Scanner

B. Microphone

C. Printer

D. Webcam

Question 63

Information displayed on a monitor screen is called:

A. Hard copy

B. Backup copy

C. Input data

D. Soft copy

Question 64

Which statement about a laser printer is correct?

A. It uses toner powder and a laser to form the image

B. It works by reading marks on paper

C. It only prints in the form of sound

D. It punches holes into cards

Question 65

A plotter is mainly used to produce:

A. Sound for presentations

B. Large drawings such as maps and building plans

C. Small digital photos from paper

D. Text typed by a user

Question 66

Which pair contains only output devices?

A. Keyboard and mouse

B. Scanner and microphone

C. Monitor and speaker

D. Joystick and webcam

Question 67

A student wants to listen to a recorded lecture in the library without disturbing others. Which output device should she use?

A. Plotter

B. Barcode reader

C. Scanner

D. Headphones

Question 68

A teacher wants a whole class to see her presentation slides on a wall screen. Which device is most suitable?

A. Multimedia projector

B. Microphone

C. Scanner

D. Trackball

Question 69

Compared with an LCD monitor, an old CRT monitor is generally:

A. Thinner and lighter

B. Bulkier and heavier

C. Unable to display any colours

D. A device used only for input

Question 70

The system unit of a desktop computer is best described as:

A. A device used only to display output

B. An input device for typing

C. The case that houses the main internal components

D. A storage medium for backups

Question 71

Which component is housed inside the system unit?

A. Keyboard

B. Mouse

C. Speaker

D. Motherboard

Question 72

What is the purpose of the cooling fan inside a system unit?

A. To remove heat and prevent components from overheating

B. To produce sound for the user

C. To increase the size of memory

D. To store the operating system

Question 73

Why does a system unit have ports on its casing?

A. To let dust enter the case

B. To connect external devices such as keyboards and printers

C. To store programs permanently

D. To increase the CPU speed

Question 74

Which port is commonly used to connect flash drives, keyboards and mice?

A. VGA

B. Ethernet

C. USB

D. HDMI

Question 75

An HDMI port on a computer is mainly used to:

A. Charge a battery only

B. Connect to a telephone line

C. Plug in a mouse

D. Send video and audio to a monitor or TV

Question 76

Which component is normally located OUTSIDE the system unit of a desktop computer?

A. Monitor

B. RAM

C. Hard disk

D. Power supply

Question 77

The metal or plastic case of a desktop computer is also known as the:

A. Cursor

B. Chassis

C. Buffer

D. Pixel

Question 78

The main circuit board that connects all the parts of a computer is the:

A. Monitor

B. Keyboard

C. Motherboard

D. Scanner

Question 79

What does CPU stand for?

A. Central Program Utility

B. Computer Personal Unit

C. Control Power Unit

D. Central Processing Unit

Question 80

Why is the CPU often called the 'brain' of the computer?

A. It executes instructions and controls other components

B. It displays the results on the screen

C. It stores all files permanently

D. It supplies electricity to the parts

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