Input and Output Devices

What are the three stages a computer works in?

• Input

• Process

• Output

What are the four main components of a computer system?

• Input unit

• Central Processing unit

• Output unit

• Secondary Storage unit

What does the Input unit convert incoming data into?

• Binary code

• Text

• Images

What are the five types of keys on a keyboard?

• Typing Keys

• Control Keys

• Navigation Keys

• Function Keys

• Numeric Keypad

What is the function of the left mouse button?

• Selects an item

• Opens an application

• Displays commands

What is a stylus used for?

• Drawing

• Making selections

• Both

What is the most efficient type of scanner?

• Flatbed Scanner

• Drum Scanner

• Optical Scanner

What technology does a flatbed scanner use?

• CCD technology

• Laser technology

• Optical sensors

How to scan Text, Graphics, and Photographs?

• Open the HP Solution Center on your system

• Open the lid of the scanner and place the picture or document you wish to scan facing downwards.

• Click on the Scan Document button

• You are then prompted to save your file as an editable document or an image, Do not forget to select the location where you want to save this file.

• After choosing the desired settings, click on the Scan button.

What is OCR (Optical Character Reader/Recognition)?

• It is used to read characters from a printed paper into the computer.

• It is a device for capturing data formed by dark and light marks on the paper.

• It is primarily used by the banking industry to facilitate the processing of cheques.

• It is an input device used for reading bar codes present on various products.