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Zenefits SDE 2

The 21 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 21

Done	Question	LeetCode
Mark Convert Sorted List to Binary Search Tree completed	Convert Sorted List to Binary Search Tree	Solve
Mark Course Schedule completed	Course Schedule	Solve
Mark Course Schedule II completed	Course Schedule II	Solve
Mark Excel Sheet Column Title completed	Excel Sheet Column Title	Solve
Mark Flatten 2D Vector completed	Flatten 2D Vector	Solve
Mark Generate Parentheses completed	Generate Parentheses	Solve
Mark Graph Valid Tree completed	Graph Valid Tree	Solve
Mark LRU Cache completed	LRU Cache	Solve
Mark Majority Element completed	Majority Element	Solve
Mark Majority Element II completed	Majority Element II	Solve
Mark Median of Two Sorted Arrays completed	Median of Two Sorted Arrays	Solve
Mark Min Stack completed	Min Stack	Solve
Mark N-Queens II completed	N-Queens II	Solve
Mark Number of Islands completed	Number of Islands	Solve
Mark Reverse Linked List completed	Reverse Linked List	Solve
Mark Shortest Distance from All Buildings completed	Shortest Distance from All Buildings	Solve
Mark Sliding Window Maximum completed	Sliding Window Maximum	Solve
Mark Trapping Rain Water completed	Trapping Rain Water	Solve
Mark Valid Palindrome completed	Valid Palindrome	Solve
Mark Valid Parentheses completed	Valid Parentheses	Solve
Mark Verify Preorder Sequence in Binary Search Tree completed	Verify Preorder Sequence in Binary Search Tree	Solve