Prefix Sum Interview Questions

Master 14 prefix sum problems frequently asked in technical interviews. These questions test your understanding of prefix sumconcepts and are essential for coding interview success.

14
Total Problems
0
Easy
12
Medium
2
Hard

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#1046MediumFrequency: 88%

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#912MediumFrequency: 87%

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#238MediumFrequency: 87%

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#560MediumFrequency: 81%

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#4
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#1783MediumFrequency: 73%

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#3639MediumFrequency: 67%

Zero Array Transformation I

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#6
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#3647MediumFrequency: 67%

Zero Array Transformation III

Asked at Google
ArrayGreedySortingHeap (Priority Queue)Prefix Sum
#7
Rank
#253MediumFrequency: 62%

Meeting Rooms II

Asked at TikTok
ArrayTwo PointersGreedySortingHeap (Priority Queue)Prefix Sum
#8
Rank
#3643MediumFrequency: 48%

Zero Array Transformation II

Asked at Google
ArrayBinary SearchPrefix Sum
#9
Rank
#3410HardFrequency: 45%

Find Longest Self-Contained Substring

Asked at Amazon
Hash TableStringBinary SearchPrefix Sum
#10
Rank
#325MediumFrequency: 43%

Maximum Size Subarray Sum Equals k

Asked at Meta
ArrayHash TablePrefix Sum
#11
Rank
#523MediumFrequency: 43%

Continuous Subarray Sum

Asked at Meta
ArrayHash TableMathPrefix Sum
#12
Rank
#410HardFrequency: 42%

Split Array Largest Sum

Asked at Google
ArrayBinary SearchDynamic ProgrammingGreedyPrefix Sum
#13
Rank
#1966MediumFrequency: 42%

Frequency of the Most Frequent Element

Asked at Google
ArrayBinary SearchGreedySliding WindowSortingPrefix Sum
#14
Rank
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