Cisco

Cisco Interview Preparation

Preparing for an interview at Cisco requires a solid understanding of core computer science fundamentals, along with specialized knowledge relevant to their specific domain and engineering culture.

System Design Focus

For system design rounds at Cisco, you should be prepared to discuss architectures that can handle their specific scale and product requirements. Practice explaining why each component belongs in your design and the trade-offs involved.

Here are previously asked system design questions to help you practice specifically for Cisco:

• Design a distributed network routing management service.
• Design a centralized firewall policy deployment system.
• Design a high-throughput network telemetry ingestion pipeline.
• Design a real-time anomaly detection system for network traffic.
• Design an enterprise role-based access control (RBAC) service.
• Design a highly available secure API gateway.
• Design a centralized log monitoring and alerting service.
• Design an automated workflow routing engine for network provisioning.
• Design an offline-capable mobile app for field technicians.
• Design a system to track historical audit logs of configuration changes.
• Design a scalable notification system for network outages.
• Design a system to sync on-premise Active Directory with Cloud IAM.
• Design a highly available chat application for enterprise support.
• Design a multi-tenant dashboard for network utilization.
• Design a webhook delivery system with robust retries.

General Preparation Advice

• Coding & Algorithms: Ensure your foundation in data structures (Arrays, Strings, Hash Maps, Trees, Graphs) is solid. Practice writing solutions out loud so your reasoning is visible while you code.
• Behavioral: Prepare short STAR stories that show ownership, collaboration, debugging, conflict resolution, learning, and measurable impact. Keep the examples specific and tied to real decisions you made.