Top DSA interview questions asked in Cisco

Yes. Cisco regularly asks coding questions based on arrays, strings, linked lists, trees, graphs, stacks, queues, and hashing. Most questions are Easy to Medium difficulty with a focus on clean implementation and problem-solving.

Unlike many companies that focus purely on DSA, Cisco often combines coding rounds with networking fundamentals, operating systems, computer networks, and system-level discussions.

Yes. Since Cisco builds networking products and infrastructure, graph concepts such as BFS, DFS, shortest paths, connected components, and traversal problems are particularly valuable.

Most Cisco coding rounds contain LeetCode Easy and Medium level problems. Candidates are generally expected to write clean, optimized code and explain their approach clearly rather than solve extremely difficult algorithmic challenges.

Very often. Candidates should be comfortable with TCP/IP, OSI layers, routing, switching, DNS, HTTP, UDP, and basic networking concepts in addition to coding questions.

Arrays, Strings, Hash Tables, Linked Lists, Trees, Graphs, Queues, Stacks, Sliding Window, BFS, DFS, and Binary Search are among the most commonly tested topics.

Freshers should build strong fundamentals in DSA and core CS subjects such as Computer Networks, Operating Systems, OOPs, and DBMS. Practicing company-specific coding questions can significantly improve interview readiness.

LeetCode is excellent for coding preparation, but Cisco candidates should additionally prepare networking concepts, system fundamentals, and project discussions because these topics are frequently explored during interviews.

Start with Arrays, Strings, Linked Lists, Trees, and Graphs. Then revise Computer Networks, Operating Systems, and OOPs concepts. Structured programs such as Namaste DSA can help candidates build a strong DSA foundation before moving to company-specific interview preparation.