Hi everyone, I recently completed Cisco’s HackerRank Online Assessment, and while everything is still fresh in my mind, I wanted to share the real question types and preparation strategies. Hopefully, this helps anyone preparing for Cisco OA in 2026!
Overview of Cisco OA (2026 Latest)
- Platform: HackerRank
- Duration: 60–90 minutes
- Format: 2–3 coding questions + a large number of MCQs
- Difficulty: Easy to Medium-Hard
- Key to passing: Full AC on at least the first two coding questions + strong performance in networking MCQs
Overall, the difficulty is moderate. It’s not extremely hard, but it definitely requires solid fundamentals and good time management.
High-Frequency Question Types (2026)
Based on my experience and feedback from other candidates, Cisco OA questions typically fall into the following categories:
1. Easy–Medium Warm-up Questions
- FizzBuzz variations
- Look-and-Say sequence
2. Tree / BST (Very Common)
- Distance between two nodes in BST
- Validate if a structure is a tree
- Tree traversal and validation problems
3. Graph Problems
- Client-Server Query Handler (BFS/DFS)
- Pathfinding / shortest path variations
4. Array / String / DP
- Minimize Number Difference
- Matrix String Search
- Dynamic Programming (partitioning / sequence DP, occasionally 3D DP)
5. Other Common Topics
- Linked list basics
- Bitwise operations
- Greedy / prefix sum problems
In my case, I encountered:
- 1 string/array problem
- 1 tree-related problem
- 1 medium-hard graph/DP problem
Time management was critical — I quickly solved the first two questions and spent most of my time on the last one.
Preparation Tips
Focus Areas for Coding
- Arrays & Strings (Sliding Window, Two Pointers, Greedy)
- Trees & BST (Traversal, validation, distance problems)
- Graphs (BFS, DFS, basic shortest path)
- Dynamic Programming (medium-level problems)
- Bit manipulation basics
MCQ Preparation (Very Important)
- Computer Networking: TCP/IP, OSI model, routing, subnetting (highest weight)
- Operating Systems
- OOP concepts
- Database fundamentals
Effective Practice Strategy
- Solve 50–60 LeetCode medium problems
- Simulate real OA using HackerRank (90 min / 3 questions)
- Focus on clean code, edge cases, and time complexity
- Use platforms like PrepInsta or GeeksforGeeks for MCQ practice
Tip: Secure full marks on the first two coding problems before tackling the last one.
Final Thoughts
Cisco OA is definitely manageable if your fundamentals are solid and you prepare well for networking MCQs. With the right strategy, your chances of passing are quite high.
If you get stuck on specific problems or want targeted mock practice and guidance, feel free to check out Programhelp. They offer structured support, high-frequency question breakdowns, and one-on-one guidance to help you perform better in OAs.
Good luck to everyone preparing for Cisco OA in 2026 — hope you all pass and land your offers!
If you've taken the Cisco OA recently, feel free to share your experience — let's help each other out!
Top comments (0)