All Oracle Coding Interview Questions
289 questions we track for Oracle, most frequently asked first. Practice any of them in the code editor and get AI feedback on your solution.
- Junior20% (59)
- Mid/Senior61% (176)
- Staff19% (54)
Questionspage 2 of 3
- Binary Tree Right Side View15 companiesMid/Senior
- Number of Islands81 companiesMid/Senior
- Happy Number27 companiesJunior
- Remove Linked List Elements8 companiesJunior
- Isomorphic Strings15 companiesJunior
- Reverse Linked List34 companiesJunior
- Course Schedule41 companiesMid/Senior
- Minimum Size Subarray Sum18 companiesMid/Senior
- Course Schedule II35 companiesMid/Senior
- Word Search II20 companiesStaff
- Kth Largest Element in an Array42 companiesMid/Senior
- Contains Duplicate21 companiesJunior
- Maximal Square28 companiesMid/Senior
- Basic Calculator23 companiesStaff
- Invert Binary Tree10 companiesJunior
- Basic Calculator II33 companiesMid/Senior
- Kth Smallest Element in a BST11 companiesMid/Senior
- Palindrome Linked List16 companiesJunior
- Lowest Common Ancestor of a Binary Tree22 companiesMid/Senior
- Product of Array Except Self44 companiesMid/Senior
- Sliding Window Maximum46 companiesStaff
- Search a 2D Matrix II17 companiesMid/Senior
- Valid Anagram38 companiesJunior
- Meeting Rooms10 companiesJunior
- Meeting Rooms II43 companiesMid/Senior
- 3Sum Smaller7 companiesMid/Senior
- Single Number III7 companiesMid/Senior
- Missing Number19 companiesJunior
- Alien Dictionary17 companiesStaff
- Closest Binary Search Tree Value9 companiesJunior
- Integer to English Words23 companiesStaff
- Move Zeroes47 companiesJunior
- Find the Duplicate Number22 companiesMid/Senior
- Longest Increasing Subsequence31 companiesMid/Senior
- Remove Invalid Parentheses10 companiesStaff
- Sparse Matrix Multiplication9 companiesMid/Senior
- Binary Tree Vertical Order Traversal10 companiesMid/Senior
- Create Maximum Number7 companiesStaff
- Coin Change42 companiesMid/Senior
- Maximum Size Subarray Sum Equals k8 companiesMid/Senior
- Count of Range Sum4 companiesStaff
- Counting Bits10 companiesJunior
- Longest Substring with At Most K Distinct Characters12 companiesMid/Senior
- Reverse Vowels of a String12 companiesJunior
- Top K Frequent Elements52 companiesMid/Senior
- Water and Jug Problem8 companiesMid/Senior
- Find Leaves of Binary Tree6 companiesMid/Senior
- Largest Divisible Subset6 companiesMid/Senior
- Find K Pairs with Smallest Sums10 companiesMid/Senior
- Kth Smallest Element in a Sorted Matrix10 companiesMid/Senior
- First Unique Character in a String26 companiesJunior
- Decode String40 companiesMid/Senior
- Remove K Digits23 companiesMid/Senior
- Frog Jump10 companiesStaff
- Trapping Rain Water II14 companiesStaff
- Split Array Largest Sum19 companiesStaff
- Add Strings14 companiesJunior
- Non-overlapping Intervals18 companiesMid/Senior
- Find All Duplicates in an Array11 companiesMid/Senior
- String Compression38 companiesMid/Senior
- Add Two Numbers II8 companiesMid/Senior
- Delete Node in a BST11 companiesMid/Senior
- Island Perimeter10 companiesJunior
- Validate IP Address12 companiesMid/Senior
- Next Greater Element I16 companiesJunior
- Diagonal Traverse12 companiesMid/Senior
- The Maze II6 companiesMid/Senior
- Contiguous Array14 companiesMid/Senior
- Single Element in a Sorted Array18 companiesMid/Senior
- Diameter of Binary Tree19 companiesJunior
- Boundary of Binary Tree13 companiesMid/Senior
- Next Greater Element III13 companiesMid/Senior
- Subarray Sum Equals K46 companiesMid/Senior
- Permutation in String16 companiesMid/Senior
- Can Place Flowers16 companiesJunior
- Task Scheduler25 companiesMid/Senior
- Palindromic Substrings25 companiesMid/Senior
- Redundant Connection8 companiesMid/Senior
- Top K Frequent Words24 companiesMid/Senior
- Number of Distinct Islands14 companiesMid/Senior
- Max Area of Island19 companiesMid/Senior
- Count Binary Substrings18 companiesJunior
- Degree of an Array11 companiesJunior
- Binary Search12 companiesJunior
- Subarray Product Less Than K19 companiesMid/Senior
- Flood Fill12 companiesJunior
- Asteroid Collision34 companiesMid/Senior
- Daily Temperatures31 companiesMid/Senior
- Open the Lock15 companiesMid/Senior
- Reorganize String21 companiesMid/Senior
- Basic Calculator III14 companiesStaff
- Rotate String12 companiesJunior
- Bus Routes17 companiesStaff
- Consecutive Numbers Sum8 companiesStaff
- Keys and Rooms10 companiesMid/Senior
- Backspace String Compare14 companiesJunior
- Longest Mountain in Array10 companiesMid/Senior
- All Nodes Distance K in Binary Tree13 companiesMid/Senior
- Leaf-Similar Trees6 companiesJunior
- Koko Eating Bananas38 companiesMid/Senior