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MCQs — Computer Systems

Practice questions for Computer Science.

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Question 41

Which of these is an example of a natural system?

A. Railway network

B. Computer network

C. Banking system

D. Solar system

Question 42

The water cycle is a natural system because it:

A. Was planned and constructed by engineers

B. Needs a computer to operate

C. Runs through natural processes such as evaporation and condensation

D. Is controlled by a government agency

Question 43

Artificial systems are systems that are:

A. Formed only by natural forces

B. Designed and built by humans for a purpose

C. Found only in living organisms

D. Unable to include machines

Question 44

Which of the following is an artificial system?

A. Human respiratory system

B. Forest ecosystem

C. Telephone network

D. Solar system

Question 45

Which pair correctly classifies the system?

A. Blood circulation – artificial

B. Railway system – natural

C. Weather system – artificial

D. Banking system – artificial

Question 46

A computer is called a system because:

A. It can be switched on and off

B. It is made of plastic and metal

C. It has a screen

D. Its hardware and software components work together to process data

Question 47

In a desktop computer, the keyboard, the CPU and the monitor perform which functions, respectively?

A. Input, processing, output

B. Output, input, processing

C. Processing, output, input

D. Storage, input, output

Question 48

A technician removes the CPU from a computer, but the monitor and keyboard still work. Why can the computer no longer perform tasks?

A. Monitors cannot work without a keyboard

B. Software is always stored on the monitor

C. Keyboards need a CPU only for power

D. The processing component is missing, and the parts must work together as a system

Question 49

Data and instructions typed into a computer belong to which stage of the IPO cycle?

A. Processing

B. Input

C. Output

D. Storage

Question 50

A student enters 25 and 30 into a calculator and sees 55 on the display. Which option correctly identifies input, process and output?

A. Input: 55; Process: display; Output: 25 and 30

B. Input: addition; Process: 25 and 30; Output: 55

C. Input: 25 and 30; Process: addition; Output: 55

D. Input: 55; Process: 25 and 30; Output: addition

Question 51

At an ATM, the machine checks the entered PIN against the bank's records. Which stage of the IPO cycle is this?

A. Input

B. Output

C. Processing

D. Feedback only

Question 52

Which device is mainly used to enter text, numbers and commands into a computer?

A. Keyboard

B. Monitor

C. Printer

D. Speaker

Question 53

Which input device converts printed pages and photographs into digital images?

A. Plotter

B. Scanner

C. Projector

D. Speaker

Question 54

At a supermarket counter, what does a barcode reader do?

A. Prints the receipt for the customer

B. Stores all the shop's products permanently

C. Reads the striped pattern on a product and sends its code to the computer

D. Displays the price to the customer on paper

Question 55

A touchscreen is often called both an input and an output device because it:

A. Prints pages and also scans them

B. Stores data and also processes it

C. Plays sound and also records it

D. Accepts touch commands and also displays information

Question 56

A joystick is mainly used to:

A. Control the movement of objects in games and simulations

B. Print large engineering drawings

C. Store files permanently

D. Convert paper documents into digital form

Question 57

Which input device captures live video and still images for video calls?

A. Scanner

B. Webcam

C. Trackball

D. Plotter

Question 58

A graphic designer wants to draw freehand sketches directly into the computer using a pen-like tool. Which device suits this best?

A. Speaker

B. Barcode reader

C. Graphics tablet

D. Laser printer

Question 59

A teacher wants to record her spoken lecture directly onto the computer. Which device should she use?

A. Joystick

B. Projector

C. Plotter

D. Microphone

Question 60

A board must check thousands of MCQ answer sheets in a short time. Which input device is most suitable?

A. Optical Mark Reader (OMR)

B. Webcam

C. Trackball

D. Speaker

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