AlgorithmsIntroduction

Putting Things in Order

Part of Binary SearchGCSE Computer Science

This introduction covers Putting Things in Order 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 2 of 8 in this topic. Use this introduction to connect the idea to the wider topic before moving on to questions and flashcards.

Topic position

Section 2 of 8

Practice

15 questions

Recall

10 flashcards

Putting Things in Order

Bubble sort is like bubbles rising in water - compare neighbours, swap if wrong order, biggest values "bubble up" to the end. Keep passing through until no swaps needed. Insertion sort is like sorting cards in your hand - pick each card and insert it into the correct position among the cards you've already sorted. Merge sort is like sorting by splitting a deck in half repeatedly, then merging back in order.

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.

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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