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Cisco interview questions

38 questions19 coding4 system design15 behavioral10 freeUpdated

This is every question in the Cisco guide, in one list: 19 coding problems, 4 system designs and 15 behavioral questions, drawn from what candidates report about Cisco interviews.

Each row shows the round it comes from and links to the lesson that works through it. 10 are free to read in full. The other 28 are Premium, and here you still see their round, difficulty and topic, so you know what you're walking into.

Open the Cisco guide Unlock all 38

Cisco coding interview questions

19 problems, in the order the guide teaches them. Each lesson gives the full problem, a worked solution and the follow-ups interviewers tend to add.

1The Complement Lookup: Two SumFreeEasyArrays, Strings & Hashing
2Bucketing by Signature: Group AnagramsFreeMediumArrays, Strings & Hashing
3Reading a Field Both Ways: Longest Palindromic SubstringFreeMediumArrays, Strings & Hashing
4The Longest Clean Window: Longest Substring Without Repeating CharactersFreeMediumArrays, Strings & Hashing
5Counting Reachable Clusters: Number of IslandsFreeMediumGraphs
6Packet Propagation Delay: Network Delay TimeFreeMediumGraphs
7Boot-Order Dependencies: Course Schedule IIFreeMediumGraphs
8The Redundant Link: Redundant ConnectionFreeMediumGraphs
9Premium medium problemMediumTrees, Linked Lists & Design
10Premium easy problemEasyTrees, Linked Lists & Design
11Premium medium problemMediumTrees, Linked Lists & Design
12Premium medium problemMediumDynamic Programming
13Premium medium problemMediumDynamic Programming
14Premium medium problemMediumDynamic Programming
15Premium medium problemMediumDynamic Programming
16Premium medium problemMediumDynamic Programming
17Premium medium problemMediumIP & Bit Manipulation
18Premium medium problemMediumIP & Bit Manipulation
19Premium medium problemMediumIP & Bit Manipulation

Cisco system design interview questions

4 designs, each worked end to end in its own lesson, from requirements to the architecture and its trade-offs.

#Question
1Design a Rate LimiterFree
2Design Network Telemetry & MonitoringFree
3Design a Load Balancer (Premium)
4Design Real-Time Chat (Premium)

A lock means the design is named here and its walkthrough is Premium.

Cisco behavioral interview questions

15 questions, grouped by what the interviewer is testing. The lesson explains why each one gets asked and what a strong answer covers.

Teamwork & collaboration (3)

All 3 are Premium

Conflict & disagreement (2)

All 2 are Premium

Deadlines & ambiguity (2)

All 2 are Premium

Innovation, learning & new tech (3)

All 3 are Premium

Why Cisco & goals (3)

All 3 are Premium

Giving back & community (2)

All 2 are Premium

Read the Cisco behavioral questions

See all 38 Cisco questions by name

Premium opens the 28 locked questions on this page, each with the full prompt and a worked answer, and every other lesson in all 100 company guides.

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Common questions

How many questions are in the Cisco interview guide?

38: 19 coding problems, 4 system designs and 15 behavioral questions. The guide was last updated in November 2026.

Which rounds do these Cisco interview questions come from?

All 19 coding problems come from the coding rounds. The 4 system designs and 15 behavioral questions come from the system design and behavioral rounds. Every row in the list carries its round, so you can start with the one you have booked.

Which Cisco interview questions are free?

10 of the 38 are free to read in full, marked Free in the list. The other 28 come with Premium, which also opens all 100 company guides.