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.
Start your Oracle mock interviewQuestions Oracle asks, live voice, scored. First one free.
- Junior20% (59)
- Mid/Senior61% (176)
- Staff19% (54)
Questionspage 1 of 3
- Two Sum129 companiesJunior
- Add Two Numbers38 companiesMid/Senior
- Longest Substring Without Repeating Characters112 companiesMid/Senior
- Median of Two Sorted Arrays47 companiesStaff
- Longest Palindromic Substring76 companiesMid/Senior
- Zigzag Conversion19 companiesMid/Senior
- Reverse Integer26 companiesMid/Senior
- Palindrome Number35 companiesJunior
- Regular Expression Matching27 companiesStaff
- Container With Most Water58 companiesMid/Senior
- Integer to Roman32 companiesMid/Senior
- Roman to Integer45 companiesJunior
- Longest Common Prefix57 companiesJunior
- 3Sum61 companiesMid/Senior
- Letter Combinations of a Phone Number40 companiesMid/Senior
- Remove Nth Node From End of List19 companiesMid/Senior
- Valid Parentheses119 companiesJunior
- Merge Two Sorted Lists40 companiesJunior
- Generate Parentheses40 companiesMid/Senior
- Merge k Sorted Lists53 companiesStaff
- Swap Nodes in Pairs16 companiesMid/Senior
- Divide Two Integers10 companiesMid/Senior
- Next Permutation31 companiesMid/Senior
- Longest Valid Parentheses28 companiesStaff
- Search in Rotated Sorted Array55 companiesMid/Senior
- Find First and Last Position of Element in Sorted Array31 companiesMid/Senior
- Valid Sudoku30 companiesMid/Senior
- Sudoku Solver18 companiesStaff
- Count and Say13 companiesMid/Senior
- Combination Sum30 companiesMid/Senior
- Combination Sum II17 companiesMid/Senior
- First Missing Positive35 companiesStaff
- Trapping Rain Water78 companiesStaff
- Multiply Strings17 companiesMid/Senior
- Wildcard Matching18 companiesStaff
- Jump Game II28 companiesMid/Senior
- Permutations26 companiesMid/Senior
- Rotate Image37 companiesMid/Senior
- Group Anagrams91 companiesMid/Senior
- Pow(x, n)23 companiesMid/Senior
- N-Queens16 companiesStaff
- Maximum Subarray66 companiesMid/Senior
- Spiral Matrix53 companiesMid/Senior
- Jump Game34 companiesMid/Senior
- Merge Intervals109 companiesMid/Senior
- Insert Interval16 companiesMid/Senior
- Rotate List12 companiesMid/Senior
- Unique Paths22 companiesMid/Senior
- Text Justification40 companiesStaff
- Sqrt(x)19 companiesJunior
- Climbing Stairs38 companiesJunior
- Simplify Path25 companiesMid/Senior
- Edit Distance31 companiesMid/Senior
- Set Matrix Zeroes24 companiesMid/Senior
- Search a 2D Matrix19 companiesMid/Senior
- Sort Colors37 companiesMid/Senior
- Minimum Window Substring34 companiesStaff
- Subsets20 companiesMid/Senior
- Word Search40 companiesMid/Senior
- Remove Duplicates from Sorted List II10 companiesMid/Senior
- Remove Duplicates from Sorted List10 companiesJunior
- Largest Rectangle in Histogram32 companiesStaff
- Merge Sorted Array38 companiesJunior
- Decode Ways23 companiesMid/Senior
- Reverse Linked List II18 companiesMid/Senior
- Restore IP Addresses18 companiesMid/Senior
- Unique Binary Search Trees11 companiesMid/Senior
- Validate Binary Search Tree20 companiesMid/Senior
- Binary Tree Level Order Traversal14 companiesMid/Senior
- Binary Tree Zigzag Level Order Traversal19 companiesMid/Senior
- Maximum Depth of Binary Tree16 companiesJunior
- Binary Tree Level Order Traversal II6 companiesMid/Senior
- Path Sum II10 companiesMid/Senior
- Flatten Binary Tree to Linked List8 companiesMid/Senior
- Distinct Subsequences14 companiesStaff
- Triangle11 companiesMid/Senior
- Best Time to Buy and Sell Stock90 companiesJunior
- Binary Tree Maximum Path Sum23 companiesStaff
- Valid Palindrome44 companiesJunior
- Word Ladder40 companiesStaff
- Longest Consecutive Sequence40 companiesMid/Senior
- Sum Root to Leaf Numbers7 companiesMid/Senior
- Surrounded Regions12 companiesMid/Senior
- Gas Station27 companiesMid/Senior
- Candy23 companiesStaff
- Word Break32 companiesMid/Senior
- Word Break II16 companiesStaff
- Linked List Cycle25 companiesJunior
- Reorder List16 companiesMid/Senior
- Sort List9 companiesMid/Senior
- Evaluate Reverse Polish Notation18 companiesMid/Senior
- Reverse Words in a String29 companiesMid/Senior
- Find Minimum in Rotated Sorted Array17 companiesMid/Senior
- Find Peak Element34 companiesMid/Senior
- Fraction to Recurring Decimal10 companiesMid/Senior
- Two Sum II - Input Array Is Sorted17 companiesMid/Senior
- Majority Element22 companiesJunior
- Largest Number22 companiesMid/Senior
- Rotate Array28 companiesMid/Senior
- House Robber38 companiesMid/Senior