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American Express SDE 2

The 27 highest-frequency questions from all time. Finish the strongest signals first.

Latest source check: 12 Oct 2026ⓘLatest successful check of the sources used by this company. A check does not necessarily mean the questions changed.

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Top questions 27

Done	Question	LeetCode
Mark Divide an Array Into Subarrays With Minimum Cost II completed	Divide an Array Into Subarrays With Minimum Cost II	Solve
Mark Maximum Equal Frequency completed	Maximum Equal Frequency	Solve
Mark Minimum Deletions to Make Character Frequencies Unique completed	Minimum Deletions to Make Character Frequencies Unique	Solve
Mark Ugly Number III completed	Ugly Number III	Solve
Mark Divide an Array Into Subarrays With Minimum Cost I completed	Divide an Array Into Subarrays With Minimum Cost I	Solve
Mark Equal Sum Arrays With Minimum Number of Operations completed	Equal Sum Arrays With Minimum Number of Operations	Solve
Mark Find a Value of a Mysterious Function Closest to Target completed	Find a Value of a Mysterious Function Closest to Target	Solve
Mark Maximize the Topmost Element After K Moves completed	Maximize the Topmost Element After K Moves	Solve
Mark Maximum XOR After Operations completed	Maximum XOR After Operations	Solve
Mark Percentage of Letter in String completed	Percentage of Letter in String	Solve
Mark Two Sum completed	Two Sum	Solve
Mark Maximum Area of Two Non-Overlapping Square Submatrices completed	Maximum Area of Two Non-Overlapping Square Submatrices	Solve
Mark Best Time to Buy and Sell Stock completed	Best Time to Buy and Sell Stock	Solve
Mark Valid Anagram completed	Valid Anagram	Solve
Mark Longest Substring Without Repeating Characters completed	Longest Substring Without Repeating Characters	Solve
Mark Find N Unique Integers Sum up to Zero completed	Find N Unique Integers Sum up to Zero	Solve
Mark Minimum Moves to Spread Stones Over Grid completed	Minimum Moves to Spread Stones Over Grid	Solve
Mark 3Sum completed	3Sum	Solve
Mark Check If It Is a Good Array completed	Check If It Is a Good Array	Solve
Mark Isomorphic Strings completed	Isomorphic Strings	Solve
Mark Linked List Cycle II completed	Linked List Cycle II	Solve
Mark Longest Common Prefix completed	Longest Common Prefix	Solve
Mark Merge Intervals completed	Merge Intervals	Solve
Mark Merge k Sorted Lists completed	Merge k Sorted Lists	Solve
Mark Permutations completed	Permutations	Solve
Mark Rotate Array completed	Rotate Array	Solve
Mark Sliding Window Maximum completed	Sliding Window Maximum	Solve