Grade 9 Chapter -2

A typing device that contains a matrix of switches or keys.

• Printer

• Scanner

• Keyboard

• Mouse

A device used to point at the desired location or option on the computer screen.

• Joystick

• Web camera

• Mouse

• Microphone

A device used to play computer games such as car racing, fight simulators etc.

• Joystick

• Digital Camera

• OCR Device

• Bar-code Reader

An electronic device used to input sound data into the computer that already has a special hardware called sound card installed on it.

• MICR Device

• Light Pen

• Speaker

• Microphone

Recognize the image: which is used to read digitise codes.

• Digital Camera

• Joystick

• Light Pen

• Bar-code Reader

What is the purpose of a Web Camera?

• A pointing device that is used to input data on touch screen.

• A video camera which feeds the image in real time to a computer.

• An electronic device that can digitise characters written in special font using special magnetic ink.

It shows the computer output in the form of text and images on paper.

• Scanner

• Speaker

• Printer

• Monitor

Which type of monitor is shown in the image?

• LCD Monitor

• LED Monitor

• CRT Monitor

What is the purpose of an Input Unit?

• To store data and instructions inside memory.

• To process the data and instructions given by the user.

• To accept data and instructions from the user.

• To display the result of computation though monitor.

The computer components are organized on a circuit board called the ______________ of a computer.

• Memory

• Motherboard

• Hard disk

• Power supply unit