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Zenefits LeetCode Questions 2026

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

Last updated: 20 Feb 2026

Timeframe

Difficulty

Problem	Difficulty	Frequency	Topics
Median of Two Sorted Arrays	HARD	100%	ArrayBinary SearchDivide and Conquer
Valid Parentheses	EASY	100%	StringStack
Generate Parentheses	MEDIUM	100%	StringDynamic ProgrammingBacktracking
Trapping Rain Water	HARD	100%	ArrayTwo PointersDynamic ProgrammingStackMonotonic Stack
N-Queens II	HARD	100%	Backtracking
Convert Sorted List to Binary Search Tree	MEDIUM	100%	Linked ListDivide and ConquerTreeBinary Search TreeBinary Tree
Valid Palindrome	EASY	100%	Two PointersString
LRU Cache	MEDIUM	100%	Hash TableLinked ListDesignDoubly-Linked List
Min Stack	MEDIUM	100%	StackDesign
Excel Sheet Column Title	EASY	100%	MathString
Majority Element	EASY	100%	ArrayHash TableDivide and ConquerSortingCounting
Number of Islands	MEDIUM	100%	ArrayDepth-First SearchBreadth-First SearchUnion-FindMatrix
Reverse Linked List	EASY	100%	Linked ListRecursion
Course Schedule	MEDIUM	100%	Depth-First SearchBreadth-First SearchGraph TheoryTopological Sort
Course Schedule II	MEDIUM	100%	Depth-First SearchBreadth-First SearchGraph TheoryTopological Sort
Majority Element II	MEDIUM	100%	ArrayHash TableSortingCounting
Sliding Window Maximum	HARD	100%	ArrayQueueSliding WindowHeap (Priority Queue)Monotonic Queue
Flatten 2D Vector	MEDIUM	100%	ArrayTwo PointersDesignIterator
Verify Preorder Sequence in Binary Search Tree	MEDIUM	100%	ArrayStackTreeBinary Search TreeRecursionMonotonic StackBinary Tree
Graph Valid Tree	MEDIUM	100%	Depth-First SearchBreadth-First SearchUnion-FindGraph Theory

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