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Microsoft interview notes, page 27 of 60

FAANG / Big Tech

Most of these Microsoft write-ups come from Software Engineers (372), then Product Managers (124) and Machine Learning Engineers (53). The most reported rounds are the technical phone screen (255), the product sense round (111), the system design round (93) and the behavioral / leadership round (49).

597 interview notes · updated Oct 2026

Microsoft·Software Engineer·Onsite - Behavioral / Leadership

May 2026
Behavioral round at Microsoft for a software engineer role, but don't let the word 'behavioral' fool you. They wanted real technical depth, specifically around distributed systems or storage work you've personally owned and operated.
  • Walk me through a storage or distributed systems module you owned end-to-end: the design decisions you made, your operational responsibilities like on-call and deployments, and how you tracked the health of the system.
  • Describe a specific production incident on a system you owned: how you first noticed something was wrong, how you diagnosed it using logs, metrics, traces, or dumps, how you isolated the root cause, and what you did to fix it and prevent recurrence.

“This is where I spent most of the time.”

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Microsoft·Software Engineer·Onsite - System Design / Architecture

May 2026
Microsoft SWE interview with a system design question about building a leaderboard. Pretty standard for this kind of role but there's more to it than you'd think once you start pulling on the thread.
  • Design a leaderboard system.

“Started with the obvious stuff, a sorted list, some kind of score store, but then you realize you need to answer questions like: how often does it update, is it real-time or periodic, how many users are we talking about.”

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Microsoft·Software Engineer·Online Assessment (OA)

May 2026
Microsoft OA with a graph problem that looked manageable at first glance but has some real complexity hiding in the edge cases. The approach matters a lot because the hidden test cases apparently punish naive solutions hard.
  • Given a weighted graph with n nodes and m edges, for each node v find the minimum-weight cycle that starts and ends at v while visiting at least one other node. Return an array where each index holds the answer for that node, or 0 if no cycle exists.

“My first instinct was to just run Dijkstra from every node and call it done, but that falls apart because you have to be careful not to reuse the edge you came in on.”

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Microsoft·Software Engineer·Onsite - Coding / Algorithms

May 2026
Microsoft SWE round that mixed behavioral and coding in the same session. The coding problem was LFU cache, which is one of those problems that looks manageable until you try to get everything to O(1) and realize you need two separate maps plus a linked list per frequency bucket.
  • Walk through a situation where you had significant impact, resolved a conflict, or had to prioritize competing work.
  • Implement an LFU cache with get(key) and put(key, value) operations, both in O(1) average time. On capacity overflow, evict the least frequently used key, breaking ties by evicting the least recently used among keys with the minimum frequency.

“Standard behavioral stuff, nothing unexpected.”

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Microsoft·Data Scientist·Technical Phone Screen

May 2026
Microsoft data scientist technical screen, one coding question the whole time. They wanted you to build a precision-recall curve from scratch, no library shortcuts, and then talk through edge cases. Pretty focused session, not a lot of small talk.
  • Given arrays of ground-truth binary labels and predicted scores, write code to generate a precision-recall curve by sweeping thresholds from high to low. Handle edge cases like no predicted positives, tied scores, and datasets with no positive examples. Optionally compute Average Precision from the resulting curve.

“This one took me longer than I expected to get right.”

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Microsoft·Technical Program Manager·Onsite - Product Sense / Strategy

May 2026
A product case interview for a Technical Program Manager role on the Azure Edge Computing/IoT team. The prompt was meaty and structured, basically a mini product design exercise with follow-up questions layered on top. Left feeling like I could have gone sharper on the metrics side.
  • Design a new product feature for enterprise customers managing large fleets of edge devices on Azure. Walk through the target user, core problem, proposed solution, and how you would measure success.
  • Which user segment would you explicitly not build for in the first version, and why?
  • What is the riskiest assumption in your solution, and how would you test it without spending a lot?
  • How would your feature design change if the business goal shifted from new customer acquisition to retaining existing enterprise accounts?
  • What guardrail metric would cause you to stop or roll back the launch?
  • What would you build in a second version if the MVP performed well?

“This was the main case and it took up most of the time.”

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Microsoft·Software Engineer·Onsite - Behavioral / Leadership

May 2026
Behavioral round at Microsoft for a SWE role, just the one question about conflict with leadership. Pretty standard stuff but it's the kind of question that sounds easy until you're actually sitting there trying to pick the right story.
  • Tell me about a time you disagreed with or had a conflict with leadership.

“I had a story ready but partway through I realized it made me sound more passive than I wanted.”

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Microsoft·Product Manager·Onsite - Product Sense / Strategy

May 2026
Got a product design question at Microsoft that I thought would be straightforward but ended up being more open-ended than I expected.
  • How would you redesign a car dashboard?

“I jumped straight into features without defining who I was designing for, which was a mistake.”

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Microsoft·Product Manager·Onsite - Product Sense / Strategy

May 2026
Microsoft product design interview, one question about building a photo app for users who are blind. Short session but the question had more depth than I expected going in.
  • How would you design a photo app for blind users?

“My first instinct was to ask why a blind person would even want a photo app, which I think actually helped frame the whole thing.”

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Microsoft·Software Engineer·Technical Phone Screen

May 2026
Microsoft coding screen for a software engineer role, one question about reconstructing a DNA sequence from linked fragments. Pretty straightforward once you see the structure, but I fumbled the setup a bit before getting there.
  • You're given a list of DNA fragment objects, each with a start ID, end ID, and a payload string. The fragments form a single chain where one fragment's end ID matches the next one's start ID. Write a function that reconstructs the full DNA sequence by chaining and concatenating the payloads in order.

“My first instinct was to sort, which was wrong.”

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