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 High-resolution scanners are used for archiving important historical documents.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.

Question 6

Which key on a standard keyboard is used to cancel a current task or operation?

Accepted Answer

Escape (Esc). The Escape key is designed to interrupt or abort a process in most software applications. It is located at the top-left corner of a standard QWERTY keyboard. Historically, it was used to send an escape character to computer terminals.

Question 7

A Joystick is most commonly used for which of the following activities?

Accepted Answer

Computer Gaming. A joystick is an input device consisting of a stick that pivots on a base and reports its angle to the computer. It is primarily used for flight simulators and various video games. It provides better control in three-dimensional virtual environments compared to a mouse.

Question 8

What type of printer uses a ribbon and tiny pins to strike paper to create characters?

Accepted Answer

Dot Matrix. Dot Matrix printers are impact printers that create images using a pattern of dots. They are known for their durability and the ability to print multi-part carbon copies. While noisy and slow, they are still used in some billing environments.

Question 9

Which device allows a computer to capture and record sound as digital data?

Accepted Answer

Microphone. A microphone is an input device that converts sound waves into electrical signals. These signals are then processed by the computer's sound card into digital audio. It is essential for voice communication and recording music.

Question 10

Which output device produces a 'soft copy' of information?

Accepted Answer

Monitor. A monitor provides a soft copy, which is an unprinted digital version of information. Soft copies are temporary and disappear once the device is turned off. In contrast, printers produce 'hard copies' on physical paper.

Input/Output — Set 1