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Zenefits Interview Questions (21)

Practice real interview problems from Zenefits

All21 Easy5 Medium11 Hard5

Status	Title	Solution	Practice	Difficulty	Companies	Topics
	4. Median of Two Sorted Arrays	Solution	Solve	Hard	Accenture+46	Array Binary Search+1
	20. Valid Parentheses	Solution	Solve	Easy	Accenture+118	Stack String
	22. Generate Parentheses	Solution	Solve	Medium	Accenture+39	Backtracking Dynamic Programming+1
	42. Trapping Rain Water	Solution	Solve	Hard	Accenture+77	Array Dynamic Programming+3
	52. N-Queens II	Solution	Solve	Hard	Amazon+9	Backtracking
	109. Convert Sorted List to Binary Search Tree	Solution	Solve	Medium	Amazon+8	Binary Search Tree Binary Tree+3
	125. Valid Palindrome	Solution	Solve	Easy	Accenture+41	String Two Pointers
	146. LRU Cache	Solution	Solve	Medium	Adobe+127	Design Doubly-Linked List+2
	155. Min Stack	Solution	Solve	Medium	Adobe+35	Design Stack
	168. Excel Sheet Column Title	Solution	Solve	Easy	Amazon+7	Math String
	169. Majority Element	Solution	Solve	Easy	Accenture+21	Array Counting+3
	200. Number of Islands	Solution	Solve	Medium	Accenture+86	Array Breadth-First Search+3
	206. Reverse Linked List	Solution	Solve	Easy	Accenture+35	Linked List Recursion
	207. Course Schedule	Solution	Solve	Medium	Adobe+41	Breadth-First Search Depth-First Search+2
	210. Course Schedule II	Solution	Solve	Medium	Amazon+32	Breadth-First Search Depth-First Search+2
	229. Majority Element II	Solution	Solve	Medium	Adobe+10	Array Counting+2
	239. Sliding Window Maximum	Solution	Solve	Hard	Adobe+47	Array Heap (Priority Queue)+3
	251. Flatten 2D Vector	Solution	Solve	Medium	Airbnb+3	Array Design+2
	255. Verify Preorder Sequence in Binary Search Tree	Solution	Solve	Medium	Expedia+4	Array Binary Search Tree+5
	261. Graph Valid Tree	Solution	Solve	Medium	Amazon+7	Breadth-First Search Depth-First Search+2
	317. Shortest Distance from All Buildings	Solution	Solve	Hard	Amazon+12	Array Breadth-First Search+1

Median of Two Sorted Arrays

Hard✓ Solution📹 Video

Accenture+46

Array Binary Search Divide and Conquer

Valid Parentheses

Easy✓ Solution📹 Video

Accenture+118

Generate Parentheses

Medium✓ Solution📹 Video

Accenture+39

Backtracking Dynamic Programming String

Trapping Rain Water

Hard✓ Solution

Accenture+77

Array Dynamic Programming Monotonic Stack+2

N-Queens II

Hard✓ Solution📹 Video

Amazon+9

Convert Sorted List to Binary Search Tree

Medium✓ Solution

Amazon+8

Binary Search Tree Binary Tree Divide and Conquer+2

Valid Palindrome

Easy✓ Solution📹 Video

Accenture+41

String Two Pointers

LRU Cache

Medium✓ Solution📹 Video

Adobe+127

Design Doubly-Linked List Hash Table+1

Min Stack

Medium✓ Solution📹 Video

Adobe+35

Excel Sheet Column Title

Easy✓ Solution

Amazon+7

Majority Element

Easy✓ Solution📹 Video

Accenture+21

Array Counting Divide and Conquer+2

Number of Islands

Medium✓ Solution📹 Video

Accenture+86

Array Breadth-First Search Depth-First Search+2

Reverse Linked List

Easy✓ Solution📹 Video

Accenture+35

Linked List Recursion

Course Schedule

Medium✓ Solution

Adobe+41

Breadth-First Search Depth-First Search Graph+1

Course Schedule II

Medium✓ Solution📹 Video

Amazon+32

Breadth-First Search Depth-First Search Graph+1

Majority Element II

Medium✓ Solution📹 Video

Adobe+10

Array Counting Hash Table+1

Sliding Window Maximum

Hard✓ Solution📹 Video

Adobe+47

Array Heap (Priority Queue)Monotonic Queue+2

Flatten 2D Vector

Medium✓ Solution📹 Video

Airbnb+3

Array Design Iterator+1

Verify Preorder Sequence in Binary Search Tree

Medium✓ Solution📹 Video

Expedia+4

Array Binary Search Tree Binary Tree+4

Graph Valid Tree

Medium✓ Solution📹 Video

Amazon+7

Breadth-First Search Depth-First Search Graph+1

Shortest Distance from All Buildings

Hard✓ Solution📹 Video

Amazon+12

Array Breadth-First Search Matrix