IGCSE Computer Science

Practical CS

CS Theory

1.1 - Data Representation

1.2 - Data Tranmission

1.3 - Hardware and Software

1.4 - Security

1.5 - Ethics

2.1 - Algorithm Design

2.2 - Programming and Pseudocode

2.3 - Databases

1.1.1 Binary

1.1.2 Hexadecimal

1.1.3 Data Representation

HTML Colours

MAC Address

Low-level programming

Debugging

Memory Dumps

0 to F

Base-16

Base-2

0 or 1

Single binary digit = 1 bit

4 bits = 1 nibble

8 bits = 1 byte

Images

Sound

Pixel

Image Resolution

Colour Depth / Bit Depth

Sample

Sample Frequency

Sample Resolution / Bit Depth

File Size (bits) = Width (pixels) Height (Pixels) Bit Depth (bits)

The total number of pixels in an image

Width in pixels * Height in pixels