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THE INTERVIEW BRIEFING

Cisco Interview Guide

Prepare for Cisco with a focused mix of coding, design, and communication. Start with your job description and confirm the interview loop with your recruiter.

10 Question notes 6 Practice picks 5 Levels mapped

01 / MAKE YOUR NEXT SESSION COUNT

Your preparation, made concrete.

AlgoDaily practice • not reported questions
0130 min suggested

Reason about string windows

Find the longest substring without repeating characters. Walk through a repeated character, an empty input, and a string with all unique characters.

What a strong answer demonstrates

Correct window updates, explicit character assumptions, and linear-time reasoning.

0230 min suggested

Make pointer changes explicit

Reverse a singly linked list in place. Draw the pointers after each step and explain how you preserve the remaining list.

What a strong answer demonstrates

Correct pointer ordering, empty and single-node cases, and constant auxiliary space.

0320 min suggested

Behavioral storytelling

Describe a technical decision you changed after receiving feedback. Explain your contribution and the outcome.

What a strong answer demonstrates

Specific actions, honest reflection, and measurable impact.

BEFORE YOU PRACTICE

Ask your recruiter.

Get the details that a generic company guide cannot know.

  • Which team and level is this opening for, and what does success look like?
  • What rounds, durations, and evaluation criteria should I prepare for?
  • Which languages, tools, and AI assistance are permitted?
  • Will design focus on frontend, backend, infrastructure, or another specialty?
  • Are there accommodations or preparation materials I should request?

Cisco practice problems

Company-linked challenges and related lessons from our library. Not a prediction of your interview.

Questions candidates have reported

Aggregated from candidate submissions and public sources.

Q1
Delete Nodes From A Linked List: How do you delete a node in a linked list. Code it on the white board.
Q2
Reverse a String: Write a string reversal function.
Q3
Power of Three: Write C code to check if an integer is a power of 2 or not in a single line?
Q4
What are the difference between des and rsa algorithm?
Q5
Give logic for implementing "diff" command in linux. consider various test cases and explain what will happen in each. the two files are source code and are huge..for e.g.file 1: 1-2-3-4 file 2: 1-3-4-2
Q6
Write code that finds a prime number.
Q7
What's trace route, how does it work?
Q8
Explain tcp sliding window mechanism.
Q9
You have 8 balls. all are identical except one is slightly heavier. you have a balance. what is the minimum number of weighings required to find the heavier ball?
Q10
How would you approach updating a code-base to support 64-bit?

Engineering levels & compensation

Historical figures from existing records; date and location may be unspecified. Verify current ranges on Levels.fyi.

Level 1

Software Engineer 1 · Grade 4

Not Available

Level 2

Software Engineer 2 · Grade 6

$129,454

$113,182 base · $3,545 stock · $12,727 bonus

Level 3

Software Engineer III · Grade 8

$148,240

$122,160 base · $11,320 stock · $14,760 bonus

Level 4

Software Engineer IV · Grade 10

$196,464

$144,179 base · $28,214 stock · $24,071 bonus

Level 5

Technical Leader 1 · Grade 11

$227,077

$157,077 base · $39,692 stock · $30,308 bonus

What people at Cisco say

Reviews originally posted on Glassdoor.

Top Ranked Networking company in the world. Best place for learn new things to improve technology. Globally trusted brand and have a very high value of its name. Abundant learning and explore many things. Challenging environment and trustworthy Corporate. Good Working culture and Diversity.
Very Good exposure to the new technologies . Excellent Work Life balance. Campus is too good and well maintained. Good people to work with. Employee Benefits are attractive. Process oriented. No hike every year but it is definitely kept in mind and normalization is done in coming years. Lot of approvals required for any change /request which makes the work lagging at times. This process should be at ease.
I have been with Cisco as a campus hire for almost 2 years now. Didn't feel like the company is fit for freshers, but good and manageable if you really want to purse in networking domain. Company culture is good. Not toxic or work obsessed. Very employee friendly in terms for PTOs, WFHs, Maternity/Paternity leaves etc. Code reviews usually make you a good progammer but it depends on the attitude of the reviewers. Treat employees well in terms of salary. Don't hoard cash and put everything in company's bank account.
Flexibility is given to employee to work and complete projects in time. Market leader in networking with great innovation and technologies to learn and work. High-Profile customers but you need to be technically solid to handle one. Low salaries compared to rest of networking companies. HR are mostly sleeping here as no actions to correct as per Market standard. Sometime a pay hike can take 3-4 years to happen. Because of these good people leave.
Great work life balance. Great work atmosphere and facilities at work. Opportunities for furthering technical skills with trainings and talks. Opportunities to work on things that interest you technically outside of your everyday work. You actually find a healthy number of older developers here. Pay when you join is pretty competitive. There are too many employees and it's difficult to be recognized. Pay hikes don't happen every year and can be less depending on the team or BU you are in.

About Cisco

A day at Cisco