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IGCSE Computer Science (CS Theory (1.1 - Data Representation (1.1.2…
IGCSE Computer Science
Practical CS
2.1 - Algorithm Design
2.2 - Programming and Pseudocode
2.3 - Databases
CS Theory
1.1 - Data Representation
1.1.1 Binary
Base-2
0 or 1
Single binary digit = 1 bit
4 bits = 1 nibble
8 bits = 1 byte
1.1.2 Hexadecimal
HTML Colours
MAC Address
Low-level programming
Debugging
Memory Dumps
0 to F
Base-16
1.1.3 Data Representation
Images
Pixel
Image Resolution
The total number of pixels in an image
Width in pixels * Height in pixels
Colour Depth / Bit Depth
File Size (bits) = Width (pixels)
Height (Pixels)
Bit Depth (bits)
Sound
Sample
Sample Frequency
Sample Resolution / Bit Depth
1.2 - Data Tranmission
1.3 - Hardware and Software
1.4 - Security
1.5 - Ethics