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Walmart Interview Questions

75 coding problems asked in Walmart interviews. Prepare for your technical interview with real questions.

Problems

Easy

Medium

Hard

Difficulty

All75 Easy12 Medium48 Hard15

Title	Solve	Difficulty	Companies	Topics
3. Longest Substring Without Repeating Characters	Solve	Medium	Adobe+20	Hash Table Sliding Window+1
5. Longest Palindromic Substring	Solve	Medium	Accenture+50	Dynamic Programming String+1
15. 3Sum	Solve	Medium	Adobe+21	Array Sorting+1
17. Letter Combinations of a Phone Number	Solve	Medium	Airtel+34	Backtracking Hash Table+1
19. Remove Nth Node From End of List	Solve	Medium	Amazon+7	Linked List Two Pointers
22. Generate Parentheses	Solve	Medium	Adobe+12	Backtracking Dynamic Programming+1
31. Next Permutation	Solve	Medium	Adobe+19	Array Two Pointers
33. Search in Rotated Sorted Array	Solve	Medium	Accenture+91	Array Binary Search
38. Count and Say	Solve	Medium	Adobe+6	String
46. Permutations	Solve	Medium	Accenture+39	Array Backtracking
49. Group Anagrams	Solve	Medium	Adobe+23	Array Hash Table+2
50. Pow(x, n)	Solve	Medium	Adobe+29	Math Recursion
53. Maximum Subarray	Solve	Medium	Adobe+22	Array Divide and Conquer+1
56. Merge Intervals	Solve	Medium	Adobe+24	Array Sorting
62. Unique Paths	Solve	Medium	Accoloite+41	Combinatorics Dynamic Programming+1
116. Populating Next Right Pointers in Each Node	Solve	Medium	Adobe+11	Binary Tree Breadth-First Search+3
117. Populating Next Right Pointers in Each Node II	Solve	Medium	Adobe+8	Binary Tree Breadth-First Search+3
122. Best Time to Buy and Sell Stock II	Solve	Medium	Amazon+7	Array Dynamic Programming+1
134. Gas Station	Solve	Medium	Adobe+8	Array Greedy
138. Copy List with Random Pointer	Solve	Medium	Aditya Birla group+30	Hash Table Linked List
139. Word Break	Solve	Medium	Accenture+38	Array Dynamic Programming+4
146. LRU Cache	Solve	Medium	Accolite+56	Design Doubly-Linked List+2
198. House Robber	Solve	Medium	Adobe+8	Array Dynamic Programming
200. Number of Islands	Solve	Medium	Adobe+40	Array Breadth-First Search+3
215. Kth Largest Element in an Array	Solve	Medium	ABCO+44	Array Divide and Conquer+3
300. Longest Increasing Subsequence	Solve	Medium	Accenture+78	Array Binary Search+1
355. Design Twitter	Solve	Medium	Amazon+2	Design Hash Table+2
373. Find K Pairs with Smallest Sums	Solve	Medium	Amazon+4	Array Heap (Priority Queue)
394. Decode String	Solve	Medium	Adobe+16	Recursion Stack+1
416. Partition Equal Subset Sum	Solve	Medium	Amazon+5	Array Dynamic Programming
518. Coin Change II	Solve	Medium	Accenture+68	Array Dynamic Programming
523. Continuous Subarray Sum	Solve	Medium	Amazon+6	Array Hash Table+2
547. Number of Provinces	Solve	Medium	Amazon+6	Breadth-First Search Depth-First Search+2
646. Maximum Length of Pair Chain	Solve	Medium	Amazon+12	Array Dynamic Programming+2
785. Is Graph Bipartite?	Solve	Medium	Bunzo+10	Breadth-First Search Depth-First Search+2
811. Subdomain Visit Count	Solve	Medium	Indeed+4	Array Counting+2
852. Peak Index in a Mountain Array	Solve	Medium	Accolite+22	Array Binary Search
934. Shortest Bridge	Solve	Medium	Dell+5	Array Breadth-First Search+2
1052. Grumpy Bookstore Owner	Solve	Medium	EPAM Systems+3	Array Sliding Window
1198. Find Smallest Common Element in All Rows	Solve	Medium	Walmart Global Tech	Array Binary Search+3
1238. Circular Permutation in Binary Representation	Solve	Medium	Walmart	Backtracking Bit Manipulation+1
1318. Minimum Flips to Make a OR b Equal to c	Solve	Medium	De Shaw and Co+4	Bit Manipulation
1328. Break a Palindrome	Solve	Medium	Expedia+10	Greedy String
1986. Minimum Number of Work Sessions to Finish the Tasks	Solve	Medium	Google+3	Array Backtracking+3
2038. Remove Colored Pieces if Both Neighbors are the Same Color	Solve	Medium	JPMorgan+2	Game Theory Greedy+2
2291. Maximum Profit From Trading Stocks	Solve	Medium	Snowflake+1	Array Dynamic Programming
2406. Divide Intervals Into Minimum Number of Groups	Solve	Medium	Adobe+2	Array Greedy+4
2541. Minimum Operations to Make Array Equal II	Solve	Medium	Walmart Labs	Array Greedy+1