Skip to content

KS3 Data Representation – Learn Guide

1. Why computers use binary

1.1 Switches and binary

1.2 All data becomes binary

1.3 Practice: binary

2.1 From bits to petabytes

2.2 Powers and conversions

2.3 Practice: data units

3. Binary and denary

3.1 Two number systems

3.3 Practice: binary and denary

4. Binary addition and overflow

4.1 Rules of binary addition

4.2 8-bit addition and overflow

4.3 Practice: binary addition

5.1 What is hex?

5.2 Converting hex

5.3 Practice: colour detective

6. ASCII and Unicode

6.1 Character sets

6.2 Using ASCII

6.3 Practice: ASCII or Unicode?

7.1 Pixels and colour depth

7.3 Practice: quality vs file size

8. Binary shifts

8.1 Left and right shifts

8.2 Loss of precision

8.3 Practice: binary shifts

9.1 Analogue to digital

9.2 Sample rate and bit depth

9.3 Practice: sound

10. Compression

10.1 Lossy and lossless

10.2 Run-length encoding

10.3 Practice: which compression?

11. Calculating file size

11.1 The three formulas

11.2 Calculate it

11.3 Practice: memory card challenge

12. Bringing it together

12.1 Mixed retrieval

12.2 Exam practice

10.3 Practice: which compression?

KS3 Data Representation – Learn Guide
10. Compression
10.3 Practice: which compression?

Scroll to Top

Login

Accessing this course requires a login. Please enter your credentials below!

Username or Email Address

Password

Remember Me

or

Login with Microsoft

Lost Your Password?

Register

Don't have an account? Register one!

Register an Account

Username

Email

Login with Microsoft

Registration confirmation will be emailed to you.