Revise Year 9
Short bursts work best: ten questions, then the words you missed, then one practice set.
Mixed quiz
53 questions. Ten at random each time, or pick one topic.
Key words
39 words. Say the meaning out loud, then turn the card.
Endless practice
Each one makes new questions for as long as you like.
Topic 14
Programming further
Predict s[a:b] · List indexes · Normal / boundary / erroneous · len, upper, find
Topic 17Cybersecurity
Crack time · Caesar encrypt · Caesar decrypt · Name the threat
Topic 5Representing images
Colours from depth · Bits for n colours · File size (KB / MB) · Decode a 1-bit row
Topic 6Representing sound
File size (MB) · Minimum sample rate · Levels from bit depth · ADC reading → volts
Topic 7Compression
RLE encode · RLE decode · Ratio / % saved · Huffman total bits
Topic 9Logic gates
Work out Q · Rows in a table · Inputs on a row · Half adder