Data Representation Topic 2

Question 1

Introduction to binary

Answer 1

• Binary numbers consists of two numbers 1 and 0.
• Computer ONLY recognises two numbers
• A bit is either 0 or 1 meaning i can represent two inputs
• A byte contains 8 bits

Question 2

Numbering System

Answer 2

• Binary base 2 - 0, 1
• Octal base 8 - 0, 1, 2, 3, 4, 5, 6, 7
• Decimal base 10 - 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
• Hexadecimal base 16 - 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F

Question 3

Data vs Information

Answer 3

• Data are raw facts and also unprocessed items like text, number, image, video and audio
• Information is organised and it is meaningful

Question 4

Data processing cycle

Answer 4

1. Input
2. Process
3. Output

Question 5

Computer Data Formats

Answer 5

1. Text
2. Sound
3. Image
4. Video