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HomeWJEC GCSE Computer ScienceAlgorithms: Searching and Sorting
WJEC · GCSE · Computer Science · Revision Notes

Algorithms: Searching and Sorting

73 words · Last updated July 2026

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What you'll learn

Standard algorithms for finding and ordering data.

Key ideas

  • Linear search (any list) vs binary search (ordered list only).
  • Sorts: bubble, insertion and merge.
  • Binary search is faster on large ordered lists.

Exam tips

  • Remember binary search needs a sorted list.
  • Trace each algorithm step by step.

Common mistakes

  • Using binary search on unsorted data.
  • Confusing the sorting algorithms.
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