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Microsoft LeetCode Questions 2026

Browse LeetCode problems frequently asked by Microsoft. Filter by difficulty and timeframe to focus your interview prep.

Last updated: 20 Feb 2026

ProblemDifficultyFrequencyTopics
Two SumEASY
100%
ArrayHash Table
Add Two NumbersMEDIUM
75%
Linked ListMathRecursion
Longest Substring Without Repeating CharactersMEDIUM
75%
Hash TableStringSliding Window
Median of Two Sorted ArraysHARD
75%
ArrayBinary SearchDivide and Conquer
Longest Palindromic SubstringMEDIUM
75%
Two PointersStringDynamic Programming
Zigzag ConversionMEDIUM
37.5%
String
Reverse IntegerMEDIUM
62.5%
Math
String to Integer (atoi)MEDIUM
62.5%
String
Palindrome NumberEASY
75%
Math
Regular Expression MatchingHARD
50%
StringDynamic ProgrammingRecursion
Container With Most WaterMEDIUM
75%
ArrayTwo PointersGreedy
Integer to RomanMEDIUM
50%
Hash TableMathString
Roman to IntegerEASY
75%
Hash TableMathString
Longest Common PrefixEASY
75%
ArrayStringTrie
3SumMEDIUM
75%
ArrayTwo PointersSorting
3Sum ClosestMEDIUM
37.5%
ArrayTwo PointersSorting
Letter Combinations of a Phone NumberMEDIUM
62.5%
Hash TableStringBacktracking
4SumMEDIUM
50%
ArrayTwo PointersSorting
Remove Nth Node From End of ListMEDIUM
50%
Linked ListTwo Pointers
Valid ParenthesesEASY
75%
StringStack

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