Cambridge IGCSE · Computer Science (0478)

Input and output devices: Practice Questions

5 multiple-choice questions marked as you go, and 5 written questions with worked solutions. All on Input and output devices.

10 questions20 marksFree, no account

Question 1

1 mark

Which of the following input devices uses a laser to scan a series of vertical black and white lines to identify a product?

Question 2

1 mark

A user is interacting with a tablet computer. The screen works by detecting the change in capacitance when a finger touches the glass, as the human body is an electrical conductor.

Which touch screen technology is being described?

Question 3

1 mark

An automated irrigation system is designed to water plants only when the soil is dry. The system includes a moisture sensor, an analogue-to-digital converter (ADC), a microprocessor, and a water valve (actuator).
Which of the following describes the most accurate sequence of events and data flow in this automated process?

Question 4

1 mark

Which of the following output devices uses an actuator to function correctly?

Question 5

1 mark

Which of the following correctly describes the operation of a 3D printer when creating an object?

Question 6

2 marks

State two optical advantages of using a Laser printer instead of an Inkjet printer in a high-volume office environment.

Write your answer out first, then check it against the worked solution.

Question 7

3 marks

Explain why a capacitive touchscreen is often preferred over a resistive touchscreen for modern smartphones.

Write your answer out first, then check it against the worked solution.

Question 8

2 marks

Identify the input device used to convert physical two-dimensional paper documents into digital image files for editing or archiving.

Write your answer out first, then check it against the worked solution.

Question 9

3 marks

a) Identify one input device and one output device.

b) For each identified device, state its primary purpose in a computer system.

Write your answer out first, then check it against the worked solution.

Question 10

5 marks

A smart home system is designed to monitor and control the temperature in a room. It uses a sensor to detect the current room temperature and an actuator to adjust it.

a) Identify the type of sensor most suitable for detecting room temperature and describe the data it captures.

b) Describe how this sensor, in conjunction with a microprocessor, would automatically control a heating system to maintain a desired temperature of $$22^\circ C$$. Your answer should include the role of an appropriate output device.

Write your answer out first, then check it against the worked solution.

* The content provided by thinka is generated by AI and may not always be accurate or up-to-date. Please use it as a supplementary resource and verify with official materials.

You've seen the model answer. Now get yours marked.

This page can show you how a good answer looks. It cannot tell you what your answer was missing. thinka marks your written work against the real mark scheme in about 15 seconds.

Get My Answers Marked Back to the notes

Want more questions like these? Get a fresh set on this topic, marked as you go.