IBM Interview Questions (170)

Practice real interview problems from IBM

Title	Solution	Practice	Difficulty	Companies	Topics
2. Add Two Numbers	Solution	Solve	Medium	Accenture+37	Linked List Math+1
3. Longest Substring Without Repeating Characters	Solution	Solve	Medium	Accenture+111	Hash Table Sliding Window+1
5. Longest Palindromic Substring	Solution	Solve	Medium	Accenture+75	Dynamic Programming String+1
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
15. 3Sum	Solution	Solve	Medium	Accenture+60	Array Sorting+1
17. Letter Combinations of a Phone Number	Solution	Solve	Medium	Accenture+39	Backtracking Hash Table+1
22. Generate Parentheses	Solution	Solve	Medium	Accenture+39	Backtracking Dynamic Programming+1
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
45. Jump Game II	Solution	Solve	Medium	Adobe+27	Array Dynamic Programming+1
48. Rotate Image	Solution	Solve	Medium	Accenture+36	Array Math+1
49. Group Anagrams	Solution	Solve	Medium	Accolite+90	Array Hash Table+2
53. Maximum Subarray	Solution	Solve	Medium	Accenture+65	Array Divide and Conquer+1
54. Spiral Matrix	Solution	Solve	Medium	Accenture+52	Array Matrix+1
56. Merge Intervals	Solution	Solve	Medium	Accenture+108	Array Sorting
71. Simplify Path	Solution	Solve	Medium	Amazon+24	Stack String
78. Subsets	Solution	Solve	Medium	Adobe+19	Array Backtracking+1
79. Word Search	Solution	Solve	Medium	Accenture+39	Array Backtracking+2
89. Gray Code	Solution	Solve	Medium	Amazon+4	Backtracking Bit Manipulation+1
98. Validate Binary Search Tree	Solution	Solve	Medium	Adobe+19	Binary Search Tree Binary Tree+2
128. Longest Consecutive Sequence	Solution	Solve	Medium	Adobe+38	Array Hash Table+1
134. Gas Station	Solution	Solve	Medium	Accolite+26	Array Greedy
146. LRU Cache	Solution	Solve	Medium	Adobe+127	Design Doubly-Linked List+2
151. Reverse Words in a String	Solution	Solve	Medium	Accenture+29	String Two Pointers
153. Find Minimum in Rotated Sorted Array	Solution	Solve	Medium	Amazon+17	Array Binary Search
155. Min Stack	Solution	Solve	Medium	Adobe+35	Design Stack
189. Rotate Array	Solution	Solve	Medium	Accenture+29	Array Math+1
200. Number of Islands	Solution	Solve	Medium	Accenture+86	Array Breadth-First Search+3
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
215. Kth Largest Element in an Array	Solution	Solve	Medium	Accenture+44	Array Divide and Conquer+3
238. Product of Array Except Self	Solution	Solve	Medium	Accenture+43	Array Prefix Sum
253. Meeting Rooms II	Solution	Solve	Medium	Adobe+42	Array Greedy+4
259. 3Sum Smaller	Solution	Solve	Medium	Google+6	Array Binary Search+2
287. Find the Duplicate Number	Solution	Solve	Medium	Accenture+22	Array Binary Search+2
322. Coin Change	Solution	Solve	Medium	Accenture+41	Array Breadth-First Search+1
435. Non-overlapping Intervals	Solution	Solve	Medium	Amazon+15	Array Dynamic Programming+2
443. String Compression	Solution	Solve	Medium	Adobe+42	String Two Pointers
451. Sort Characters By Frequency	Solution	Solve	Medium	Accenture+16	Bucket Sort Counting+4
453. Minimum Moves to Equal Array Elements	Solution	Solve	Medium	Amazon+7	Array Math
475. Heaters	Solution	Solve	Medium	Adobe+11	Array Binary Search+2
560. Subarray Sum Equals K	Solution	Solve	Medium	Accenture+45	Array Hash Table+1
636. Exclusive Time of Functions	Solution	Solve	Medium	Amazon+10	Array Stack
713. Subarray Product Less Than K	Solution	Solve	Medium	Adobe+20	Array Binary Search+2
735. Asteroid Collision	Solution	Solve	Medium	Accolite+34	Array Simulation+1
754. Reach a Number	Solution	Solve	Medium	Amazon+7	Binary Search Math
763. Partition Labels	Solution	Solve	Medium	Amazon+8	Greedy Hash Table+2
767. Reorganize String	Solution	Solve	Medium	Adobe+23	Counting Greedy+4