Merge Sort (OCR A-Level Computer Science): Quizzes

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Merge Sort
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What approach does Merge Sort use?

Divide-and-conquer

What is the time complexity of Merge Sort in the worst case?

O(nlog⁡n)O(n \log n)

What is the space complexity of Merge Sort?

O(n)O(n)

What does it mean that Merge Sort is stable?

It maintains order of equal elements

What are the three main steps of Merge Sort?

Divide, Conquer, Merge

What condition stops the recursion in Merge Sort?

Array length is 1 or less

In the Merge method, what are the three indices used?

ii, jj, kk

During merging, which element is placed in the merged array first?

The smaller element

What common mistake involves elements after one subarray is exhausted?

Not copying remaining elements

What type of datasets is Merge Sort particularly effective for?

Large datasets

How is the midpoint calculated when splitting the array?

array.length DIV 2

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