Question

Write down the attributes of three computer hardware input devices. Discuss the form of interaction each supports in a computer system.

Answer 1

Three computer hardware input devices are : Keyboard, Mouse, Joy Stick.

Attributes/Characteristics of Keyboard

1. To perform a specific function, there are various keys on the keyboard.

2. They are less expensive.

3. The work of mouse can also be handled using Keyboard.

4. There are 4 main parts of keyboard : cursor keys, numeric keypad, function keys and main keyboard.

Interaction of Keyboard with Computer : When we type using keyboard, its processor analyzes the key matrix and then based on this, characters are sent to the computer.

Attributes/Characteristics of Mouse

1. It is a handheld hardware input device.

2. Controls the cursor in GUI.

3. Perform operations like move, select, open, etc.

Interaction of Mouse with computer : Mouse interacts with computer using its balls. When we move the mouse on a flat surface, the ball rolls and pushes against two plastic rolls which are linked to thin wheels. The up and down movement is detected by one wheel and sidewise movement is detected by another wheel.

Attributes/Characteristics of Joy Stick

1. Consists of a stick pivot on a base and tells the direction and angle to the device that it is controlling.

2. Also known as control column.

3. Often used to control video games and also has some buttons whose states are read by computer.

Interaction of Joystick with computer : A joystick interacts with the computer system by detecting the direction in which you are holding the stick using electronic switch.

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