OCI teams use different platforms for online coding screens or hackathons. For example, the current public OCI HackerRank assessment lasts 60 minutes and has 4 questions: two coding questions, one on algorithms, and one on data structures. Other early-career teams may combine coding questions with aptitude, computer science, or communication questions. Check your invitation for the specific format.

When to Expect the OA for Your Role

Candidates for internships and new graduate roles normally take the OA after an application interview and before the technical interviews. For experienced engineering roles, teams may use a recruiter interview and live HackerRank screen instead. Complete the sample environment before starting, confirm the deadline, and reserve the full time block. At least one Oracle test requires full-screen mode and does not allow pauses.

Does Your Online Assessment Matter?

When Oracle uses an OA, candidates must pass it to advance. Oracle scores code submissions by the number of passed tests. Mixed-format assessments may also include aptitude sections, technical sections, or both. Oracle does not use a universal cutoff; the required score varies by role. Submit correct, testable code. If time allows, improve its efficiency and explain your assumptions.

Compiled List of Oracle OA Question Types

The strongest preparation covers arrays, stacks, linked lists, graph traversal, dynamic programming, and cache design.

1. Two Sum — hash-map lookup and array indexing.
2. Valid Parentheses — stack-based delimiter validation.
3. Product of Array Except Self — prefix and suffix accumulation.
4. Merge Two Sorted Lists — pointer movement through linked lists.
5. Course Schedule — graph cycles and topological ordering.
6. Continuous Subarray Sum — prefix remainders and edge cases.
7. LRU Cache — coordinated map and linked-list operations.
8. Binary Tree Maximum Path Sum — tree recursion with local and global state.
9. Bus Routes — breadth-first search over connected routes.

Oracle Interview Questions

Recently asked in real interviews

These questions were asked recently in real Oracle interviews. Practice these and 4,000+ other questions from 1,000+ companies on Lodely.

Valid Parentheses

algorithmscoding Easy

Given an array, find the two sum.

algorithmscoding Easy

Product of Array Except Self

algorithmscoding Easy

Design a key-value store.

system-design Medium

Tell me about a time when you solved a complex problem and how you went about it.

behavioral Medium

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How to Prepare and Pass the Oracle Online Assessment

Create a 2-week schedule. In week one, do one array, stack, linked-list, tree, and graph problem per day. In week two, complete 3 uninterrupted mock assessments lasting 60 to 90 minutes each. Check empty inputs, duplicates, overflow, and disconnected graphs before submitting. If your invitation includes a multiple-choice section, review OOP, databases, operating systems, networking, and SQL.

Use Lodely for Oracle-specific coding, system design, and behavioral questions. Then use editorials or training paths to address gaps from each mock.

Oracle Interview Question Breakdown

Course Schedule

Type: Directed graph. Prompt: Determine whether all prerequisites can be completed. The Trick: A dependency cycle prevents completion, even with multiple components. What This Tests: Graph representation, traversal-state management, and complexity reasoning.

LRU Cache

Type: Data-structure design. Prompt: Provide access to the most recently used item with a fixed capacity. The Trick: Every read changes an item's recency. A map alone cannot track the required order. What It Tests: Using complementary structures and keeping them synchronized.

What Comes After the Online Assessment

Technical interview questions focus on data structures, core computer science concepts, projects, and role-specific design. Some early-career interview loops then move to management and HR questions. Review your OA before these interviews. Be ready to explain complexity, write clean code in response to review feedback, and connect design choices to reliability and scale.

Conclusion

Prepare for the exact format in your invitation, and cover enough material to account for differences among Oracle teams. Use Lodely's daily company-specific questions to focus on patterns you have not mastered under pressure.