Oracle Coding Interview Questions (2026)
Most-reported questions and how to practice them
313 coding questions reported by candidates for Oracle, sorted by how often they were reported. Source: community-sourced LeetCode company lists.
What the Oracle question data shows
Of the 313 questions reported for Oracle, 62% are medium, 19% are hard and 19% are easy. The most reported are LRU Cache, Two Sum, Longest Substring Without Repeating Characters, Number of Islands, Merge k Sorted Lists.
This list comes from community-sourced LeetCode company lists. It covers coding questions only. It does not tell us how many rounds Oracle runs, what each round covers, or what it pays, and those change by role, level and team, so we do not list them. Ask your recruiter what each round covers, and check the company's careers page.
Prepare for the rest of the loop with the coding interview patterns guide, the system design framework, and the STAR method guide. Written by Kieron.
Practice what you read with a free AI mock interview, see how the tools compare in our AI interview copilot comparison, or check Aissence pricing.
Oracle Interview Questions
313 LeetCode questions — sorted by frequency. Question frequency is community-sourced from public interview reports and may not reflect the current process; verify details with the employer.
Last reviewed: September 5, 2026 · Source: LeetCode company-wise interview questions (community reports) · Reviewed by the Aissence Editorial Team.
LRU Cache
Two Sum
Longest Substring Without Repeating Characters
Number of Islands
Merge k Sorted Lists
Group Anagrams
Spiral Matrix
Merge Intervals
Sliding Window Maximum
Meeting Rooms II
Top K Frequent Elements
Valid Parentheses
Longest Palindromic Substring
Container With Most Water
Roman to Integer
3Sum
Generate Parentheses
Search in Rotated Sorted Array
Trapping Rain Water
Maximum Subarray
Tips for Success at Oracle
Start with the 30 most reported Oracle questions, then work down the list.
Mediums are the bulk of the list (62%), so spend most of your time there.
Time yourself: 20 to 30 minutes per medium, then explain your solution out loud as if to an interviewer.
After each problem write down the pattern and the signal that revealed it. Patterns transfer to problems you have not seen.
Pair coding practice with a system design framework and prepared behavioral stories; most loops include more than coding.
How to Practice for Oracle Interviews
Practice answering out loud with an AI interviewer built from your resume and the job description, and get a score and specific fixes for each answer. We are not affiliated with Oracle, and the mock interview is general practice rather than a simulation of Oracle's own format.
- ✓ Free mock interview built from your resume and the job description
- ✓ Desktop Interview Copilot for live interviews, where the rules allow it
- ✓ Behavioral practice with feedback on structure and specifics
- ✓ System design practice with follow-up questions
Frequently Asked Questions
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