Question 1

Which of the following is considered the most common input device for entering text into a computer?

Accepted Answer

Keyboard. A keyboard allows users to input letters, numbers, and commands directly into the system. It is based on the traditional typewriter design with additional functional keys. Almost every desktop and laptop computer relies on it for primary data entry.

Question 2

What type of device is a Computer Monitor?

Accepted Answer

Output. A monitor is an output device that displays visual information processed by the computer. It allows users to see text, images, and videos on a screen. Modern monitors typically use LCD or LED technology for display.

Question 3

Which technology is primarily used by an Optical Mouse to detect movement?

Accepted Answer

Laser or LED. An optical mouse uses a light source and a tiny camera to track the movement of the device over a surface. This technology replaced the older mechanical mice that used a rubber ball. It offers higher precision and requires less maintenance than mechanical versions.

Question 4

What is the primary function of a document scanner?

Accepted Answer

To convert physical images into digital format. A scanner is an input device that captures images from physical paper and converts them into digital signals. These digital copies can then be edited or stored on a computer. High-resolution scanners are used for archiving important historical documents.

Question 5

Which output device is used to produce large-scale drawings such as architectural blueprints and maps?

Accepted Answer

Plotter. Plotters are specialized output devices designed for printing vector graphics with high precision on large paper sheets. Unlike standard printers, they often use pens to draw continuous lines. They are widely used by engineers and architects for technical drawings.

Input/Output — Set 1