The best way to know about computer

Q. No.1:          What are peripheral devices?

Ans:                Computer hardware that is controlled by the CPU is called a Peripheral. Peripheral include input and output devices. These are also called I/O devices.

Q. No.2:          What are input devices? Write names.

Ans:                Devices that accept data and send it to the CPU are called input devices. A Keyboard, mouse, joystick, microphone, MICR, light pen, scanner, sensor and webcam etc all are input devices.

Q. No.3:          What are output devices? Write names.

Ans:                Output devices display information from a computer. A visual display unit or monitor, speaker, printer, plotter are called output devices.

Q. No.4:          What is a keyboard?

Ans:                A keyboard is a peripheral device through which you can enter number letters and commands into the computer.

Q. No.5:          What is manual data entry?

Ans:                The process of entering data through the keyboard is called manual data entry.

Q. No.6:          What is mouse?

Ans:                A mouse is hand held device with two or three buttons is used for moving the pointer around on the screen.

Q. No.7:          Explain touch screen.

Ans:                A touch screen allows us to interact with the computer by touching the display screen. It is sensitive and can detect the presence and location of a touch on the display unit.

Q. No.8:          What is bar code: and how can we read bar codes?

Ans:                A bar code is a set of thick and thin lines printed on grocery items books and many other products. These lines contain information about the product. Bar code readers can read bar codes.

Q. No.9:          What is webcam?

Ans:                Webcam are devices connected to computers to capture video.

Q. No.10:        What is printer? Write how many types of printers?

Ans:                A printer allows us to print on paper documents stored in electronic form.