Chapter 2

Question 1

What are the four components of hardware?

Answer 1

• input devices
• CPU
• output devices
• memory

Question 2

What is ‘bit’ short for?

Answer 2

Binary digit

Question 3

How many bits has 2^8 values?

Answer 3

8

Question 4

How many possible values do 5 bits hold?

Answer 4

2^5

Question 5

What does ASCII stand for?

Answer 5

American Standard Code Information Interchange

Question 6

What is ASCII for?

Answer 6

For characters; there is a set code for each specific character.

Question 7

Define input.

Answer 7

Data or instructions that enter the memory.

Question 8

What are the properties of computer hardware?

Answer 8

Physical and tangible

Question 9

Define input device

Answer 9

Devices that allow the user to key in instructions and data

Question 10

Define data

Answer 10

Unprocessed audio, video, images, text or numbers

Question 11

Define instruction

Answer 11

Programs commands and user responses

Question 12

What is a keyboard?

Answer 12

A device that keys in numbers, letters and allows shift, tab, Caps Lock among other functions.

Question 13

What type of device controls the cursor?

Answer 13

The pointing device.

Question 14

Describe the mouse

Answer 14

It fits under your palm and uses a rubber ball

Question 15

Describe The optical mouse

Answer 15

Uses light to sense movement

Question 16

Describe the trackball

Answer 16

Remains stationary except you rotate the ball

Question 17

What are the properties of the touchpad?

Answer 17

The touchpad is sensitive to pressure and motion.

Question 18

Describe the joy stick

Answer 18

A vertical lever as a pointing device.

Question 19

What’s a pointing stick?

Answer 19

A small button often in the middle of a keyboard used to control the cursor using a finger

Question 20

Is touch screen a pointing device?

Answer 20

Yes, because it allows the user to interact with the interface.

Question 21

List the 7 pointing devices.

Answer 21

Mouse
Optical Mouse
Track ball
Touchpad 
Joystick
Pointing stick
Touchscreen

Question 22

What is MIDI?

Answer 22

Musical instrument Digital Interface.