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Prefix Sum Interview Questions

20 Prefix Sum problems asked across FAANG and top tech companies. Approach hints, optimal solutions, and related problems.

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Prefix Sum 20
Prefix SumClear all
560.Subarray Sum Equals K
ArrayHash TablePrefix Sum
Medium+2▶ Mock
238.Product of Array Except Self
ArrayPrefix Sum
Medium+5▶ Mock
410.Split Array Largest Sum
ArrayBinary SearchDynamic Programming
Hard▶ Mock
303.Range Sum Query - Immutable
ArrayDesignPrefix Sum
Easy▶ Mock
2559.Count Vowel Strings in Ranges
ArrayStringPrefix Sum
Medium▶ Mock
1004.Max Consecutive Ones III
ArrayBinary SearchSliding Window
Medium▶ Mock
209.Minimum Size Subarray Sum
ArrayBinary SearchSliding Window
Medium▶ Mock
3413.Maximum Coins From K Consecutive Bags
ArrayBinary SearchGreedy
Medium▶ Mock
2251.Number of Flowers in Full Bloom
ArrayHash TableBinary Search
Hard▶ Mock
1915.Number of Wonderful Substrings
Hash TableStringBit Manipulation
Medium▶ Mock
713.Subarray Product Less Than K
ArrayBinary SearchSliding Window
Medium▶ Mock
528.Random Pick with Weight
ArrayMathBinary Search
Medium▶ Mock
974.Subarray Sums Divisible by K
ArrayHash TablePrefix Sum
Medium▶ Mock
1248.Count Number of Nice Subarrays
ArrayHash TableMath
Medium▶ Mock
1352.Product of the Last K Numbers
ArrayMathDesign
Medium▶ Mock
2171.Removing Minimum Number of Magic Beans
ArrayGreedySorting
Medium▶ Mock
2237.Count Positions on Street With Required Brightness
ArrayPrefix Sum
Medium▶ Mock
2439.Minimize Maximum of Array
ArrayBinary SearchDynamic Programming
Medium▶ Mock
2680.Maximum OR
ArrayGreedyBit Manipulation
Medium▶ Mock
3919.Minimum Cost to Move Between Indices
ArrayPrefix Sum
Medium▶ Mock

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