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Walmart Labs Interview Questions (143)

Practice real interview problems from Walmart Labs

All143 Easy22 Medium95 Hard26

Status	Title	Solution	Practice	Difficulty	Companies	Topics
	4. Median of Two Sorted Arrays	Solution	Solve	Hard	Accenture+44	Array Binary Search+1
	23. Merge k Sorted Lists	Solution	Solve	Hard	Airbnb+49	Divide and Conquer Heap (Priority Queue)+2
	25. Reverse Nodes in k-Group	Solution	Solve	Hard	Amazon+26	Linked List Recursion
	41. First Missing Positive	Solution	Solve	Hard	Amazon+32	Array Hash Table
	42. Trapping Rain Water	Solution	Solve	Hard	Accenture+72	Array Dynamic Programming+3
	44. Wildcard Matching	Solution	Solve	Hard	Amazon+16	Dynamic Programming Greedy+2
	52. N-Queens II	Solution	Solve	Hard	Amazon+9	Backtracking
	76. Minimum Window Substring	Solution	Solve	Hard	Adobe+34	Hash Table Sliding Window+1
	84. Largest Rectangle in Histogram	Solution	Solve	Hard	Accenture+29	Array Monotonic Stack+1
	135. Candy	Solution	Solve	Hard	Accenture+23	Array Greedy
	224. Basic Calculator	Solution	Solve	Hard	Adobe+24	Math Recursion+2
	239. Sliding Window Maximum	Solution	Solve	Hard	Adobe+47	Array Heap (Priority Queue)+3
	295. Find Median from Data Stream	Solution	Solve	Hard	Amazon+39	Data Stream Design+3
	305. Number of Islands II	Solution	Solve	Hard	Amazon+9	Array Hash Table+1
	332. Reconstruct Itinerary	Solution	Solve	Hard	Adobe+22	Depth-First Search Eulerian Circuit+1
	407. Trapping Rain Water II	Solution	Solve	Hard	Amazon+13	Array Breadth-First Search+2
	460. LFU Cache	Solution	Solve	Hard	Amazon+31	Design Doubly-Linked List+2
	716. Max Stack	Solution	Solve	Hard	Amazon+9	Design Doubly-Linked List+3
	730. Count Different Palindromic Subsequences	Solution	Solve	Hard	Google+3	Dynamic Programming String
	815. Bus Routes	Solution	Solve	Hard	Amazon+17	Array Breadth-First Search+1
	987. Vertical Order Traversal of a Binary Tree	Solution	Solve	Hard	Amazon+14	Binary Tree Breadth-First Search+4
	1977. Number of Ways to Separate Numbers	Solution	Solve	Hard	Walmart Labs	Dynamic Programming String+1
	2071. Maximum Number of Tasks You Can Assign	Solution	Solve	Hard	Amazon+4	Array Binary Search+4
	2179. Count Good Triplets in an Array	Solution	Solve	Hard	Bloomberg+2	Array Binary Indexed Tree+5
	2402. Meeting Rooms III	Solution	Solve	Hard	Amazon+11	Array Hash Table+3
	2449. Minimum Number of Operations to Make Arrays Similar	Solution	Solve	Hard	Amazon+1	Array Greedy+1

Median of Two Sorted Arrays

Hard✓ Solution📹 Video

Accenture+44

Array Binary Search Divide and Conquer

Merge k Sorted Lists

Hard✓ Solution📹 Video

Airbnb+49

Divide and Conquer Heap (Priority Queue)Linked List+1

Reverse Nodes in k-Group

Hard✓ Solution

Amazon+26

Linked List Recursion

First Missing Positive

Hard✓ Solution📹 Video

Amazon+32

Array Hash Table

Trapping Rain Water

Hard✓ Solution📹 Video

Accenture+72

Array Dynamic Programming Monotonic Stack+2

Wildcard Matching

Hard✓ Solution📹 Video

Amazon+16

Dynamic Programming Greedy Recursion+1

N-Queens II

Hard✓ Solution📹 Video

Amazon+9

Minimum Window Substring

Hard✓ Solution

Adobe+34

Hash Table Sliding Window String

Largest Rectangle in Histogram

Hard✓ Solution📹 Video

Accenture+29

Array Monotonic Stack Stack

Candy

Hard✓ Solution📹 Video

Accenture+23

Basic Calculator

Hard✓ Solution📹 Video

Adobe+24

Math Recursion Stack+1

Sliding Window Maximum

Hard✓ Solution

Adobe+47

Array Heap (Priority Queue)Monotonic Queue+2

Find Median from Data Stream

Hard✓ Solution

Amazon+39

Data Stream Design Heap (Priority Queue)+2

Number of Islands II

Hard✓ Solution📹 Video

Amazon+9

Array Hash Table Union Find

Reconstruct Itinerary

Hard✓ Solution

Adobe+22

Depth-First Search Eulerian Circuit Graph

Trapping Rain Water II

Hard✓ Solution📹 Video

Amazon+13

Array Breadth-First Search Heap (Priority Queue)+1

LFU Cache

Hard✓ Solution

Amazon+31

Design Doubly-Linked List Hash Table+1

Max Stack

Hard✓ Solution📹 Video

Amazon+9

Design Doubly-Linked List Linked List+2

Count Different Palindromic Subsequences

Hard✓ Solution

Google+3

Dynamic Programming String

Bus Routes

Hard✓ Solution📹 Video

Amazon+17

Array Breadth-First Search Hash Table

Vertical Order Traversal of a Binary Tree

Hard✓ Solution📹 Video

Amazon+14

Binary Tree Breadth-First Search Depth-First Search+3

Number of Ways to Separate Numbers

Hard✓ Solution📹 Video

Walmart Labs

Dynamic Programming String Suffix Array

Maximum Number of Tasks You Can Assign

Hard✓ Solution📹 Video

Amazon+4

Array Binary Search Greedy+3

Count Good Triplets in an Array

Hard✓ Solution

Bloomberg+2

Array Binary Indexed Tree Binary Search+4

Meeting Rooms III

Hard✓ Solution📹 Video

Amazon+11

Array Hash Table Heap (Priority Queue)+2

Minimum Number of Operations to Make Arrays Similar

Hard✓ Solution📹 Video

Amazon+1

Array Greedy Sorting