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AlgorithmsStudy Notes

Exam Tips

Part of Binary Search — GCSE Computer Science

This study notes covers Exam Tips within Binary Search for GCSE Computer Science. Revise Binary Search in Algorithms for GCSE Computer Science with 15 exam-style questions and 10 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 8 of 8 in this topic. Use this study notes to connect the idea to the wider topic before moving on to questions and flashcards.

Topic position

Section 8 of 8

Practice

15 questions

Recall

10 flashcards

Exam Tips

  • Show your working: Show the list after each pass/step
  • Efficiency: Merge sort is O(n log n), bubble/insertion are O(n²)
  • Common mistake: Forgetting that bubble sort needs multiple passes

Keep building this topic

Read this section alongside the surrounding pages in Binary Search. That gives you the full topic sequence instead of a single isolated revision point.

Memory TrickVideo LessonPutting Things in Order

Practice Questions for Binary Search

Which of the following is a requirement before binary search can be used?

  • A. The list must contain an even number of items
  • B. The list must be sorted in order
  • C. The list must be stored in a 2D array
  • D. The target value must be in the first half of the list
1 markfoundation

Describe how a binary search algorithm finds a target value in a sorted list.

3 marksstandard

Quick Recall Flashcards

What is the time complexity of binary search?
O(log n) - logarithmic time
What technique does binary search use?
Divide and conquer - repeatedly halves the search space

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