Big Tech

Cisco Interview Process & Prep Guide (2026)

Difficulty: Medium-High

By Durgesh Yadav — Senior Data Engineer @ 7-Eleven · Updated July 2026

The Cisco interview process

Online assessment -> 2-3 technical rounds (DSA, networking, systems) -> hiring manager

The actual Cisco interview loop

Cisco India hires through campus drives and lateral panels with a heavy emphasis on networking and systems fundamentals over pure DSA grinding; expect deep TCP/IP, OS and C/C++ questioning alongside moderate coding, run by engineers from the specific business unit (routing, security, Webex, Meraki) you would join.

1. Online Assessment
~60 min · Medium
HackerRank-style test: aptitude, MCQs on networking/OS/C, and one or two easy-medium coding problems.
aptitude · TCP/IP basics · OS fundamentals · arrays and strings
2. Technical Interview 1
~50 min · Medium
DSA problems at easy-medium level plus networking fundamentals — OSI vs TCP/IP, what happens when you type a URL, subnetting.
linked lists and trees · TCP vs UDP · subnetting · sorting and searching
3. Technical Interview 2 (Domain Deep-Dive)
~60 min · Hard
BU-specific depth: packet walkthroughs, routing protocols, C/C++ memory and debugging, or systems design of a network service for senior candidates.
BGP/OSPF · C pointers and memory · multithreading · packet flow debugging · design of network services
4. Managerial Round
~45 min · Medium
Hiring manager probes projects end-to-end, ownership, teamwork and why-Cisco; light technical cross-checks.
project deep-dive · ownership · team conflict · career intent
5. HR Discussion
~30 min · Easy
Compensation, location (Bangalore/Chennai), notice period and offer formalities.
compensation · relocation · notice period

Scenario questions Cisco actually asks

Practice framing answers to the kinds of company-specific scenarios interviewers use — these come from Cisco's real products and systems:

→How would you handle packet flow through a layer-3 switch from ingress port to egress, including ARP and routing-table lookup?
→How would you handle longest-prefix-match routing table lookup structure for a core router?
→How would you handle streaming telemetry pipeline collecting metrics from 100k routers without overwhelming collectors?
→How would you handle QoS and jitter handling for Webex real-time voice/video over congested links?
→How would you handle zero-touch provisioning of thousands of Meraki access points from the cloud?
→How would you handle troubleshooting intermittent packet loss across a BGP peering between two ISPs?

The Cisco tech stack to prep

CC++PythonGoLinux kernel networkingNETCONF/YANG and gRPC telemetry

What Cisco screens for

Data structures & algorithms, networking fundamentals, operating systems, problem-solving

Culture & values at Cisco

Connect everythinginnovate everywherebenefit everyone

How to prepare for Cisco

Practise DSA plus computer networking deeply; revise OS; prepare project and behavioral answers

Roles Cisco hires

Software Engineer, Network Engineer, Data Engineer, Security Engineer, DevOps Engineer

Frequently asked questions

What is the interview process at Cisco?

The Cisco interview process typically runs: Online assessment -> 2-3 technical rounds (DSA, networking, systems) -> hiring manager. Prepare for each round in order rather than only the first — the later stages usually carry the most weight.

How hard is the Cisco interview?

Cisco interviews are rated medium-high difficulty. The bar is highest on data structures & algorithms — go deep there and practise explaining your reasoning out loud.

What does Cisco look for in candidates?

Cisco focuses on Data structures & algorithms, networking fundamentals, operating systems, problem-solving. Culturally, it values Connect everything, innovate everywhere, benefit everyone. Line up your examples to hit both the technical bar and these values.

How do I prepare for a Cisco interview?

Practise DSA plus computer networking deeply; revise OS; prepare project and behavioral answers. Use PrepNPlaced's Target Brief for a Cisco-specific plan, Resume Lab to pass their ATS, and Live Mock to rehearse the exact rounds.

What roles does Cisco hire for?

Cisco commonly hires Software Engineer, Network Engineer, Data Engineer, Security Engineer, DevOps Engineer. Match your resume and preparation to the specific role family you are targeting for the sharpest results.

Preparing for Cisco?

PrepNPlaced builds your company game plan, an ATS-ready resume, and real interview practice for this exact process.

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