Part+1

** INPUT DEVICES **

1. Where does the name ‘QWERTY’ Keyboard come from?

The qerty keyboard has the arrangement of Q W E R T Y keys in a row there for giving it the name

2. Why do you think the QWERTY keyboard is the most popular method of data entry?

It is very easy to use and more comfortable.

3. Who might make use of a concept keyboard?

Disabled or people with specific needs not fulfilled by the standard

4. What are the benefits of using a concept keyboard?

It is faster for special inputs such as instead of typing in Burger, you hit the Burger button

5. Explain why a mouse often called a pointing device

It controls the Mouse in the screen, that used to be called the pointer

6. Describe the difference between a mouse and a tracker ball?

A mouse uses infrared technology to sense movement on a flat surface, a tracker ball user rotates the ball and the infrared technology senses that

7. Which type of input device would you choose if you were going to play a ‘shoot ‘em up’ computer game?

Mouse or trackball

8. Who is likely to use a Graphics Tablet and why?

An artist because it can replicate the strokes of a real pen

9. Explain briefly how scanners work A light hits the pigment on the paper and reflects back telling the scanner what colors there are

10. Explain why automated input devices allow more accurate input of data than manual input devices

Manual input means human input and humans make mistakes whereas the computer almost never makes any mistakes.

11.a What do the initials MICR stand for?

…………………………………………………………………………………………………………….

11.b Where are you most likely to come across this type of input device?

…………………………………………………………………………………………………………….

12. Explain how OMR is used to help mark test papers An omr

13a. Why do Credit cards have a magnetic stripe on the back?

It has its on magnetic signature that scanners can detect

13b. What is used to read the information from the magnetic stripe?

A scanner or magnetic scanners

13c. What are some of the problems with this method of data storage?

It can become demagnetize and hitting, bending or dropping the card can damage the data

14 a. What device is used to capture the barcodes on products?

Scanner

14 b. Explain why the price isn’t stored on the barcode. It could get rubbed off, the price is also to be decided by the owner of the store where the product is sold

15. Which input device would you suggest for the following situations:


 * Writing a story for homework || QWERTY keyboard ||
 * = Drawing a cartoon = || Mouse/ graphics tablet ||
 * Checking your bank balance at the bank || mouse ||
 * Storing information on your Credit card || Scanner ||
 * Changing the text from a page into digital format so you can edit it. || scanner ||
 * Storing information on bank cheques. ||  ||