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ORACLE · CODING QUESTIONS

Oracle coding interview questions

The data structures and algorithms questions candidates report from Oracle interviews, linked to AlgoRung problems with an editor, hidden tests, an animated walkthrough and solutions in four languages. Most asked topics: Arrays & Hashing, Heaps, Graphs, Binary Search.

From public candidate reports and Oracle's careers pages, checked November 2026. Processes vary by team. AlgoRung is not affiliated with Oracle.

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All 14 reported Oracle coding questions

Difficulty
Topic
14 questions
  1. Group Anagrams Medium Arrays & Hashing also Amazon, Meta
  2. Next Greater Element I Easy Monotonic Stack also Adobe, Walmart Global Tech
  3. Search a 2D Matrix II (Young Tableau) Medium Binary Search
  4. Shortest Path in Binary Matrix Medium Graphs
  5. Merge Intervals Medium Intervals also Netflix, LinkedIn, Atlassian
  6. Missing Number Easy Bit Manipulation
  7. LRU Cache Medium Design Data Structures also Amazon, Microsoft, Apple +4
  8. Serialize and Deserialize Binary Tree Hard Trees & BST also Amazon, Meta, LinkedIn
  9. Minimum Window Substring Hard Arrays & Hashing also Google, Meta, LinkedIn
  10. Course Schedule Medium Graphs also Google, Amazon, Netflix +1
  11. 01 Matrix Medium Graphs
  12. Linked List Cycle Easy Linked List
  13. Product of Array Except Self Medium Arrays & Hashing also Meta
  14. Continuous Subarray Sum Medium Arrays & Hashing also Adobe
Also reported, not on AlgoRung yet (2)

Reorganize String · Number of Matching Subsequences

How the coding round is scored · The online assessment

Questions people ask

What coding questions does Oracle ask?

Candidates most often report Group Anagrams, Next Greater Element I, Search a 2D Matrix II (Young Tableau), Shortest Path in Binary Matrix, Merge Intervals. The full list of 14 reported questions is on this page, each linked to a practice problem with solutions.

Which topics should I study for the Oracle coding interview?

heaps, greedy, arrays, binary search, graphs, intervals. A 45 to 60 minute live interview where you solve one or two data-structures-and-algorithms problems while explaining your thinking. Interviewers score problem solving, code quality, testing and communication.

How hard are Oracle coding questions?

Of the reported questions on AlgoRung, 3 are easy, 9 medium and 2 hard. Expect mostly medium problems, with follow-ups that change a constraint.

Coding questions at other companies

Coding questions across all companies · Behavioral questions