Part 2

selection-and-iteration

• 2.1

  Boolean expressions and short-circuiting

  Unit 2 is the largest slice of the exam after data collections, and this is where its multiple-choice questions live.

  4 min
• 2.2

  Loops, and tracing them by hand

  The exam asks what a loop prints and how many times its body runs. Both are answered by tracing, and tracing is a skill you practise.

  4 min