Dashboard Questions Topics Companies Sheets

Oracle Interview Questions

136 coding problems asked in Oracle interviews. Prepare for your technical interview with real questions.

136

Problems

Easy

Medium

Hard

Difficulty

All136 Easy26 Medium84 Hard26

Title	Solve	Difficulty	Companies	Topics
1. Two Sum	Solve	Easy	Accenture+29	Array Hash Table
2. Add Two Numbers	Solve	Medium	Adobe+14	Linked List Math+1
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
7. Reverse Integer	Solve	Medium	Adobe+10	Math
13. Roman to Integer	Solve	Easy	Accenture+18	Hash Table Math+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
20. Valid Parentheses	Solve	Easy	Adobe+25	Stack String
21. Merge Two Sorted Lists	Solve	Easy	Accenture+9	Linked List Recursion
22. Generate Parentheses	Solve	Medium	Adobe+12	Backtracking Dynamic Programming+1
23. Merge k Sorted Lists	Solve	Hard	Adobe+17	Divide and Conquer Heap (Priority Queue)+2
30. Substring with Concatenation of All Words	Solve	Hard	Amazon+4	Hash Table Sliding Window+1
32. Longest Valid Parentheses	Solve	Hard	Amazon+6	Dynamic Programming Stack+1
33. Search in Rotated Sorted Array	Solve	Medium	Accenture+91	Array Binary Search
34. Find First and Last Position of Element in Sorted Array	Solve	Medium	Adobe+18	Array Binary Search
40. Combination Sum II	Solve	Medium	Amazon+4	Array Backtracking
42. Trapping Rain Water	Solve	Hard	Adobe+21	Array Dynamic Programming+3
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
54. Spiral Matrix	Solve	Medium	Accenture+21	Array Matrix+1
56. Merge Intervals	Solve	Medium	Adobe+24	Array Sorting
62. Unique Paths	Solve	Medium	Accoloite+41	Combinatorics Dynamic Programming+1
63. Unique Paths II	Solve	Medium	Amazon+19	Array Dynamic Programming+1
64. Minimum Path Sum	Solve	Medium	Amazon+8	Array Dynamic Programming+1
68. Text Justification	Solve	Hard	Adobe+25	Array Simulation+1
74. Search a 2D Matrix	Solve	Medium	Accenture+23	Array Binary Search+1
76. Minimum Window Substring	Solve	Hard	Adobe+9	Hash Table Sliding Window+1
88. Merge Sorted Array	Solve	Easy	Amazon+9	Array Sorting+1
92. Reverse Linked List II	Solve	Medium	1218 Global+122	Linked List
94. Binary Tree Inorder Traversal	Solve	Easy	Adobe+13	Binary Tree Depth-First Search+2
98. Validate Binary Search Tree	Solve	Medium	Adobe+8	Binary Search Tree Binary Tree+2
102. Binary Tree Level Order Traversal	Solve	Medium	Amazon+8	Binary Tree Breadth-First Search+1
103. Binary Tree Zigzag Level Order Traversal	Solve	Medium	Adobe+8	Binary Tree Breadth-First Search+1
108. Convert Sorted Array to Binary Search Tree	Solve	Easy	Amazon+4	Array Binary Search Tree+3
112. Path Sum	Solve	Easy	Amazon+4	Binary Tree Breadth-First Search+2
113. Path Sum II	Solve	Medium	Amazon+4	Backtracking Binary Tree+2
116. Populating Next Right Pointers in Each Node	Solve	Medium	Adobe+11	Binary Tree Breadth-First Search+3
121. Best Time to Buy and Sell Stock	Solve	Easy	Adobe+30	Array Dynamic Programming
122. Best Time to Buy and Sell Stock II	Solve	Medium	Amazon+7	Array Dynamic Programming+1
124. Binary Tree Maximum Path Sum	Solve	Hard	Adobe+14	Binary Tree Depth-First Search+2
139. Word Break	Solve	Medium	Accenture+38	Array Dynamic Programming+4
141. Linked List Cycle	Solve	Easy	42gearMobilitySystems+131	Hash Table Linked List+1
146. LRU Cache	Solve	Medium	Accolite+56	Design Doubly-Linked List+2
149. Max Points on a Line	Solve	Hard	Amazon+4	Array Geometry+2
150. Evaluate Reverse Polish Notation	Solve	Medium	Amazon+6	Array Math+1
153. Find Minimum in Rotated Sorted Array	Solve	Medium	Adobe+6	Array Binary Search
155. Min Stack	Solve	Medium	Adobe+7	Design Stack