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Screna has 12 Cisco interview write-ups. The most reported round is the product sense round (6).

12 interview notes · updated Jul 2026

Cisco·Software Engineer·Technical Phone Screen

Jul 2026
Cisco software engineer interview with three algorithmic problems, all fairly involved. The grid traversal one at the end was the kind of question that makes you question your life choices mid-interview.
  • Given an integer array, find the contiguous subarray with the maximum sum and return the sum along with its start and end indices. If there are ties in sum, prefer the shorter subarray, then the earliest start. Must run in O(n) time with O(1) space. Also explain how your solution handles arrays where all values are negative.
  • Given an array of integers, return the smallest value that appears exactly once. Return the minimum among all such values, or -1 if none exist. Aim for O(n) time. Follow-up: how does your approach change under tight memory constraints or when the integer range is bounded?
  • On an m by n grid starting at the top-left cell, you move counterclockwise cycling through right, up, left, down. Each move skips one cell and lands two cells away in the current direction. The skipped cell stays unvisited. If the landing cell is out of bounds or already visited, rotate 90 degrees counterclockwise and try again. Stop when all four directions are blocked. Return the last visited cell's coordinates, and analyze the time and space complexity of your solution.

“Kadane's algorithm, pretty standard.”

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Cisco·Software Engineer·Technical Phone Screen

Jul 2026
Interviewed for a SWE role at Cisco and got a stats question I wasn't really expecting in that context.
  • What does the confidence level actually mean when you construct a confidence interval?

“I fumbled this a bit.”

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Cisco·Product Manager·Hiring Manager Screen

Jul 2026
Cisco interview with just one question about a favorite software product. Pretty short on details so hard to say much about how it went.
  • What is your favorite software product and why?

“I always half-dread this question because it sounds casual but you can really fumble it if you just pick something obvious and say 'it's intuitive.' Tried to pick something I actually use and talked through what the product does well from a user and business angle.”

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Cisco·Software Engineer·Recruiter / HR Screen

Jun 2026
Short Cisco SWE interview with basically one question to go on.
  • Why do you want to work at Cisco?

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Cisco·Product Manager·Onsite - Product Sense / Strategy

Jun 2026
Cisco PM role play interview where they put you in the hot seat as a product manager dealing with a supply chain crisis and have you walk through a live client conversation. Pretty intense format if you've never done a role play before.
  • You are a PM at Cisco facing supply chain disruptions. Role play a conversation with a client on how you would address the situation.

“The role play format threw me a bit.”

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Cisco·Software Engineer·Technical Phone Screen

Jun 2026
Interviewed for a Software Engineer role at Cisco and got handed an LFU cache problem almost immediately after introductions. The session didn't go great, mostly self-inflicted, and I was rejected a few days later.
  • Implement an LFU (Least Frequently Used) cache.

“Had actually reviewed this the night before, which made it worse in a way because I felt overconfident and just started coding without walking through my approach first.”

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Cisco·Product Manager·Onsite - Product Sense / Strategy

May 2026
Interviewed at Cisco, got asked one of those product sense questions that sounds casual but kind of isn't.
  • What is your favorite non-software product, and why?

“I fumbled the opening on this one.”

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Cisco·Product Manager·Onsite - Product Sense / Strategy

May 2026
Interviewed for a PM role at Cisco, got asked about Webex specifically. Pretty focused session, just one meaty strategy question that took up most of the time.
  • How would you define goals and measure success for Webex?

“I went straight to engagement metrics and kind of fumbled around DAU/MAU ratios for a bit before remembering to anchor on what Webex is actually trying to do competitively.”

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Cisco·Product Manager·Onsite - Product Sense / Strategy

May 2026
PM interview at Cisco, one question focused on a cross-product integration scenario. Pretty technical for a PM role, felt like they wanted to see how you'd think through a real partnership problem rather than just product sense fluff.
  • How would you integrate LinkedIn with Cisco Webex so that user profiles from LinkedIn are visible during Webex meetings?

“I went straight to the API angle, talking about OAuth flows and surfacing profile data in the meeting UI.”

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Cisco·Product Manager·Hiring Manager Screen

Apr 2026
PM interview at Cisco with a classic crisis scenario question. Pretty short session from what I can tell, just one question but it packed a lot into it.
  • It's Wednesday and you have a critical release due Friday for a key customer. Your engineering manager flags a major bug. How do you handle it?

“I went straight into triage mode in my answer, which I think was right, but I spent too long on the technical side and almost forgot to loop in the customer-facing stakeholders.”

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