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Microsoft interview notes, page 43 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·Product Manager·Onsite - Product Sense / Strategy

Jun 2026
Microsoft PM interview with one question about customer prioritization. Pretty lean on details but the question itself is a solid one that trips people up if they haven't thought about it before.
  • If you could only speak with one customer of your product to gather feedback, who would you choose and why?

“I fumbled this a bit because I went straight to 'power user' without thinking it through.”

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Microsoft·Software Engineer·Onsite - System Design / Architecture

Jun 2026
Microsoft system design round, focused entirely on ETL pipeline architecture. Pretty dense question that kept branching into new sub-topics every time I thought I'd covered enough ground.
  • Design an ETL pipeline orchestrated by a job scheduler, covering the extract, transform, and load stages, dependency management between jobs, fault tolerance, load balancing, caching, async queues, retries, and monitoring.

“This question just kept expanding.”

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Microsoft·Product Manager·Onsite - Product Sense / Strategy

Jun 2026
Microsoft product sense question, just the one scenario about an ice cream shop. Short and case-style, felt more like a PM warm-up than a full round.
  • You're working at an ice cream shop and step away briefly. When you come back, there's a large crowd waiting. How do you optimize the serving time?

“I went straight into operational fixes like adding a second server or pre-scooping popular flavors, but I think I missed the bigger framing.”

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Microsoft·Product Manager·Recruiter / HR Screen

Jun 2026
Short screen for a PM role at Microsoft, mostly just a casual conversation about how I keep up with the industry. Nothing technical, felt more like a vibe check than a real interview round.
  • What kinds of news do you typically read, and how do you stay informed about what's happening in AI?
  • What's a recent AI development or piece of news that caught your attention?
  • Which tools or newsletters do you use to keep up with AI?

“I fumbled this a bit because I read a lot but don't have a clean answer ready.”

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Microsoft·Software Engineer·Technical Phone Screen

Jun 2026
Microsoft SWE interview with a tricky stock trading problem that had a constraint I hadn't seen before. The D-day window restriction turned the usual buy-low-sell-high problem into something that actually required some thought.
  • Given an array of daily stock prices and an integer D, find the maximum profit from at most one buy-sell transaction where the sell must happen within D days of the buy. Return the best profit and the buy/sell indices, or 0 if no profitable trade exists. Your solution must run in O(n) time with O(1) extra space. Also discuss how you'd handle streaming input and very large D.

“The window constraint is what makes this non-trivial.”

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Microsoft·Product Manager·Onsite - Product Sense / Strategy

Jun 2026
PM interview at Microsoft with a single product design question about building a food delivery app. Pretty open-ended, which sounds like a gift until you realize how easy it is to go in circles with no constraints.
  • Design a food delivery app specifically for restaurant owners and food vendors (not consumers).

“The B2B angle is what tripped me up.”

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Microsoft·Machine Learning Engineer·Technical Phone Screen

Jun 2026
ML fundamentals screen for a Microsoft MLE role. Pretty conceptual, no coding, just a lot of back-and-forth about model selection and specific algorithms. Left feeling like I either nailed it or completely missed what they were looking for.
  • How do you decide which type of model to use for a given problem? Walk through how you'd think about it.
  • Can you explain how XGBoost works and describe where it performs well versus where you'd avoid it?

“This is the kind of question that sounds easy until you're actually on the spot.”

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Microsoft·Product Manager·Onsite - Behavioral / Leadership

Jun 2026
Behavioral round at Microsoft for a PM role, pretty standard stuff but this influence question tripped me up more than I expected.
  • Describe a situation where you had to use your influence, without direct authority, to push a decision forward.

“I had a story ready but halfway through I realized it made me sound more like a bystander than someone actually driving anything.”

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Microsoft·Software Engineer·Technical Phone Screen

Jun 2026
Microsoft SWE coding round, one question about processing a stream of timestamped data into time-bucketed windows and returning min/max per window. Pretty focused session, no fluff.
  • Given a stream of timestamped data points grouped into fixed-length time windows (e.g. 2-second buckets), write a function that returns a list of (min, max) tuples for each non-empty window, preserving order. Must run in O(n) over total points.

“My first instinct was to reach for a sorted structure and I had to talk myself out of it.”

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Microsoft·Product Manager·Onsite - Product Sense / Strategy

Jun 2026
Interviewed at Microsoft for what seemed like a product or strategy role. Just one question but it's a big one, the kind where you can go a hundred different directions and somehow still feel like you missed the point.
  • How would you improve the health of the internet?

“I rambled for probably two minutes before landing anywhere useful.”

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