Walmart Labs Interview Questions (152)

Practice real interview problems from Walmart Labs

Title	Solution	Practice	Difficulty	Companies	Topics
1. Two Sum	Solution	Solve	Easy	Accenture+128	Array Hash Table
3. Longest Substring Without Repeating Characters	Solution	Solve	Medium	Accenture+111	Hash Table Sliding Window+1
4. Median of Two Sorted Arrays	Solution	Solve	Hard	Accenture+46	Array Binary Search+1
5. Longest Palindromic Substring	Solution	Solve	Medium	Accenture+75	Dynamic Programming String+1
6. Zigzag Conversion	Solution	Solve	Medium	Amazon+18	String
7. Reverse Integer	Solution	Solve	Medium	Accenture+25	Math
11. Container With Most Water	Solution	Solve	Medium	Accenture+57	Array Greedy+1
12. Integer to Roman	Solution	Solve	Medium	Accenture+31	Hash Table Math+1
13. Roman to Integer	Solution	Solve	Easy	Accenture+44	Hash Table Math+1
14. Longest Common Prefix	Solution	Solve	Easy	Accenture+56	String Trie
15. 3Sum	Solution	Solve	Medium	Accenture+60	Array Sorting+1
19. Remove Nth Node From End of List	Solution	Solve	Medium	Accenture+18	Linked List Two Pointers
20. Valid Parentheses	Solution	Solve	Easy	Accenture+118	Stack String
22. Generate Parentheses	Solution	Solve	Medium	Accenture+39	Backtracking Dynamic Programming+1
23. Merge k Sorted Lists	Solution	Solve	Hard	Accenture+52	Divide and Conquer Heap (Priority Queue)+2
25. Reverse Nodes in k-Group	Solution	Solve	Hard	Adobe+27	Linked List Recursion
26. Remove Duplicates from Sorted Array	Solution	Solve	Easy	Accenture+27	Array Two Pointers
31. Next Permutation	Solution	Solve	Medium	Adobe+30	Array Two Pointers
33. Search in Rotated Sorted Array	Solution	Solve	Medium	Accolite+54	Array Binary Search
36. Valid Sudoku	Solution	Solve	Medium	Adobe+29	Array Hash Table+1
39. Combination Sum	Solution	Solve	Medium	Airbnb+29	Array Backtracking
40. Combination Sum II	Solution	Solve	Medium	Adobe+16	Array Backtracking
41. First Missing Positive	Solution	Solve	Hard	Adobe+34	Array Hash Table
42. Trapping Rain Water	Solution	Solve	Hard	Accenture+77	Array Dynamic Programming+3
44. Wildcard Matching	Solution	Solve	Hard	Amazon+17	Dynamic Programming Greedy+2
48. Rotate Image	Solution	Solve	Medium	Accenture+36	Array Math+1
49. Group Anagrams	Solution	Solve	Medium	Accolite+90	Array Hash Table+2
50. Pow(x, n)	Solution	Solve	Medium	Accenture+22	Math Recursion
52. N-Queens II	Solution	Solve	Hard	Amazon+9	Backtracking
53. Maximum Subarray	Solution	Solve	Medium	Accenture+65	Array Divide and Conquer+1
54. Spiral Matrix	Solution	Solve	Medium	Accenture+52	Array Matrix+1
55. Jump Game	Solution	Solve	Medium	Adobe+33	Array Dynamic Programming+1
56. Merge Intervals	Solution	Solve	Medium	Accenture+108	Array Sorting
57. Insert Interval	Solution	Solve	Medium	Amazon+15	Array
67. Add Binary	Solution	Solve	Easy	Amazon+12	Bit Manipulation Math+2
72. Edit Distance	Solution	Solve	Medium	Accenture+30	Dynamic Programming String
73. Set Matrix Zeroes	Solution	Solve	Medium	Amazon+23	Array Hash Table+1
74. Search a 2D Matrix	Solution	Solve	Medium	Accenture+18	Array Binary Search+1
75. Sort Colors	Solution	Solve	Medium	Adobe+33	Array Sorting+1
76. Minimum Window Substring	Solution	Solve	Hard	Adobe+33	Hash Table Sliding Window+1
78. Subsets	Solution	Solve	Medium	Adobe+19	Array Backtracking+1
79. Word Search	Solution	Solve	Medium	Accenture+39	Array Backtracking+2
81. Search in Rotated Sorted Array II	Solution	Solve	Medium	Accenture+9	Array Binary Search
84. Largest Rectangle in Histogram	Solution	Solve	Hard	Adobe+31	Array Monotonic Stack+1
90. Subsets II	Solution	Solve	Medium	Amazon+8	Array Backtracking+1
91. Decode Ways	Solution	Solve	Medium	Adobe+22	Dynamic Programming String
92. Reverse Linked List II	Solution	Solve	Medium	Adobe+17	Linked List
97. Interleaving String	Solution	Solve	Medium	Amazon+12	Dynamic Programming String
102. Binary Tree Level Order Traversal	Solution	Solve	Medium	Adobe+13	Binary Tree Breadth-First Search+1
103. Binary Tree Zigzag Level Order Traversal	Solution	Solve	Medium	Accenture+16	Binary Tree Breadth-First Search+1