Cisco's Interview Process (2026)

Blog / Cisco's Interview Process (2026)
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Cisco's software engineer interview process typically spans 4 to 8 weeks and follows a structured multi-stage pipeline. Most candidates report a dual focus on standard coding ability and networking fundamentals, so expect both to come up at nearly every stage.
  • Online Assessment (HackerRank): Usually a 70 to 90 minute HackerRank test with 2 to 3 coding questions and around 40 multiple-choice questions covering networking, operating systems, and databases.
  • Recruiter Screen: A short introductory call, typically around 30 minutes, to discuss your background, motivation, and general fit for the role.
  • Technical Phone Screen: Usually 1 to 2 rounds conducted over Webex, each around 45 to 60 minutes. Expect a structured walkthrough of your resume alongside one medium-level coding question.
  • Virtual Onsite / Final Loop: A series of typically 3 to 5 back-to-back interviews, sometimes split across two days, covering technical deep dives, system design, and behavioral questions.
  • Hiring Manager / HR Round: A final conversation focused on team fit, Cisco's values, and compensation expectations.
To prepare effectively, focus your study plan around these key areas that consistently appear throughout Cisco's process:
  • Data Structures & Algorithms (DSA): LeetCode-style coding questions focused on graphs, dynamic programming, and linked lists.
  • System Design (High-Level Design): Architecture and scalability questions, often with a networking or infrastructure angle.
  • Low-Level Design (Object-Oriented Design): Class-level design problems testing your ability to model real-world systems cleanly.
  • CS Fundamentals: Networking, operating systems, and core computer science concepts tested throughout the process.
  • Behavioral: Values-based questions centered on Cisco's People Deal and how you handle real-world engineering challenges.
1. Data Structures & Algorithms (DSA)Cisco's coding questions typically appear in the OA and the technical phone screen, with a few more in the onsite loop. Difficulty ranges from medium to hard, with a clear bias toward graphs and dynamic programming.Expect questions like Reverse Linked List, Linked List Cycle, and Longest Palindromic Substring in phone screens. Graph traversal problems such as Number of Islands and Course Schedule also come up frequently, so make sure BFS and DFS are second nature.For dynamic programming, Kadane's Algorithm is a known favorite. Practice it directly through Maximum Subarray and work through similar DP problems like House Robber and Decode Ways. Our dynamic programming questions and graphs questions are good places to drill these patterns.Cisco interviewers expect clean, runnable code, not pseudocode. You should be comfortable writing bug-free solutions in Java or Python and explaining your trade-offs out loud. Working through our top 100 DSA questions is a solid way to build that fluency.
2. System Design (High-Level Design)System design questions appear in the virtual onsite and tend to have a networking or infrastructure flavor. You might be asked to design a network monitoring service, a URL shortener, or a rate limiter, so expect the design space to feel more backend and infrastructure-heavy than at a typical product company.Key topics include horizontal vs. vertical scaling, load balancing, and API design. Candidates also report being asked about Design a Rate Limiter style problems, so brush up on token bucket and sliding window approaches. Our High-Level Design case studies are a good resource for working through these kinds of problems.If you want to practice drawing out architectures interactively, try our System Design Whiteboard to simulate the onsite experience. Focus on articulating why you make each decision, not just what the architecture looks like.
3. Low-Level Design (Object-Oriented Design)Low-level design questions at Cisco test whether you can model a real-world system cleanly at the class level. Commonly reported problems include a Parking Lot System, a Design a Logging Library, and a Splitwise (Expense Sharing) app.These questions reward clear class hierarchies, sensible use of design patterns, and the ability to reason about extensibility. Practice thinking through your object model before writing any code, and be ready to defend why you chose one structure over another. Our Low-Level Design practice section has worked examples you can use to sharpen this skill.
4. CS FundamentalsNetworking is treated as a first-class topic at Cisco, even for pure software engineering roles. The OA's multiple-choice section is heavily weighted toward the OSI model, TCP vs. UDP, subnetting, and how switches differ from routers. Candidates who aced the coding portion but skipped networking prep report being rejected at this stage.Expect questions like 'What happens at each layer when you connect to Wi-Fi?' or 'Walk me through a TCP handshake.' Brush up on these with our networking fundamentals resource before sitting the OA.Operating systems concepts also appear regularly, including deadlocks, virtual memory, paging, and concurrency. For backend roles in particular, Java multithreading is a known area of focus. Our operating systems concepts section covers the core topics you need to revisit.
5. BehavioralCisco's behavioral round is centered on its 'People Deal' framework, which emphasizes collaboration, accountability, and integrity. Questions typically ask how you handled a production failure, resolved a conflict with a teammate, or made a difficult technical decision under pressure.Structure your answers clearly using the STAR principle to keep your responses focused and specific. Vague stories won't land well here. Interviewers want to understand your actual role and the concrete impact of your actions.Also be prepared for your resume to come under scrutiny in this round. Candidates consistently report being asked to defend every technical choice in their project history, so know your own work deeply. Our Behavioral Playbook can help you prepare structured, specific stories before the interview.
ConclusionCisco's process rewards candidates who prepare broadly across coding, system design, and networking fundamentals, not just those who grind LeetCode. Start early, treat networking as non-negotiable, and practice explaining your reasoning out loud. Follow the Cisco Interview Roadmap for a structured, stage-by-stage plan to get you from application to offer.

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