Chapter 2

Question 1

What are input and output devices in the context of computer systems?

Answer 1

Input devices are used to enter data into a computer.

Output devices are required so that the results of computer processing can be processed directly (e.g. by controlling motors) or be displayed to the users of the system.

Question 2

Give examples of input devices that can be used with a computer.

Answer 2

Examples of input devices are keyboards, pointing devices, joysticks, driving wheels, touch screens, scanners, sensors, remote controls, cameras and microphones.

Question 3

Explain the difference between manual data input and direct data input to a computer.

Answer 3

Data can be input by hand or directly to a computer without any manual intervention.

Question 4

Name various devices used for direct data input to a computer.

Answer 4

Data can be directly entered using devices such as magnetic stripe readers, chip and PIN readers, RFID readers, OMRs, OCRs, bar code readers and QR scanners.

Question 5

Describe how sensors can be used for automatic data input.

Answer 5

Data can be input automatically using sensors.

Question 6

Provide examples of output devices that are used with computers.

Answer 6

Examples of output devices are monitors, touch screens, projectors, printers, plotters, buzzers, motors and heaters.

Question 7

Why is it important to consider the advantages and disadvantages of input and output devices when selecting them for a particular use?

Answer 7

The advantages and disadvantages of input and output devices should be considered before being able to know which is best for any particular
use.

8. It’s essential to weigh the pros and cons of input and output devices to choose the most suitable one for a specific task.

Question 8

How can you determine which input and output devices are best suited for a specific task or application?

Answer 8

9. To determine the best devices for a given purpose, consider performance, compatibility, and user needs.