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Microsoft interview notes, page 56 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·Machine Learning Engineer·Technical Phone Screen

Jul 2026
Microsoft ML Engineer interview with a classic algorithms question that had more depth to it than I expected. They wanted you to actually think through the trade-offs, not just spit out code.
  • Given an array of numbers, find the top K largest elements. Walk through multiple approaches and their trade-offs, then implement the heap-based solution.

“I started with sorting because it's the obvious answer and I wanted to show I could at least get there.”

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Microsoft·Software Engineer·Hiring Manager Screen

Jul 2026
Hiring manager round for a Firmware Engineer role at Microsoft. Pretty light on coding, mostly a conversation about projects and why you want to be on the team. Not as technical as I expected but you still need to have your fundamentals ready.
  • Why are you interested in joining this team specifically?
  • Walk me through a project you worked on, covering the problem, your approach, and the impact.
  • Can you explain some core technical fundamentals relevant to firmware engineering?

“Knew this was coming and still fumbled it a bit.”

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Microsoft·Product Manager·Onsite - System Design / Architecture

Jul 2026
Microsoft PM interview that leaned heavily on your resume. They wanted you to design something from your own past work, which sounds easy until you're actually in it.
  • Pick a project from your resume and design a system around it.
  • Walk me through the design decisions you made and what challenges came up along the way.

“I thought pulling from my own work would make this easier.”

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Microsoft·Software Engineer·Technical Phone Screen

Jul 2026
Microsoft interview focused on a BST successor search problem. Not much context to go on but it reads like a standard technical screen.
  • Given a node in a binary search tree, find its in-order successor.

“Classic BST traversal problem but I always second-guess myself on the edge cases.”

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Microsoft·Software Engineer·Technical Phone Screen

Jul 2026
Microsoft SWE interview with a design-your-own Tic-Tac-Toe class problem. Pretty classic but the O(1) constraint is where things get interesting and where I almost fumbled it.
  • Design and implement a TicTacToe class for an n×n board. It should support a move() method that takes a row, column, and player number, and returns 0 if no one has won yet, or the winning player's number if that move ends the game. The solution needs to run in O(1) time per move and O(n) space.

“My first instinct was to just scan the whole row and column after each move, which works but falls apart at n=10^4.”

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Microsoft·Software Engineer·Onsite - System Design / Architecture

Jul 2026
Microsoft system design round, one big question about building a RAG pipeline end to end. Pretty dense for a single session but they clearly wanted to see if you could reason through the whole stack, not just recite buzzwords.
  • Design a Retrieval-Augmented Generation pipeline that takes a user query, retrieves relevant passages from a large corpus, ranks them, and returns the top K results to inject into an LLM prompt. Walk through ingestion, retrieval, ranking, and the trade-offs involved.

“This one sprawls fast if you're not careful.”

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Microsoft·Software Engineer·Technical Phone Screen

Jul 2026
Microsoft SWE coding round, two questions both centered on palindromes. Pretty niche combo but the follow-up was genuinely tricky and I didn't feel great leaving.
  • Given an integer, determine whether it is a palindrome without converting it to a string.
  • Given an integer n, return the smallest palindrome that is strictly greater than n.

“The no-string constraint is the whole point here.”

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Microsoft·Product Manager·Onsite - Product Sense / Strategy

Jul 2026
PM interview at Microsoft that got into AI-assisted app building tools pretty quickly. One question but it had some teeth to it, less about features and more about how you think the underlying system actually works.
  • Have you used tools like Lovable? What did you like or dislike about it, and how do you think it actually works under the hood beyond just 'it builds apps'?

“The second part is what got me.”

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Microsoft·Software Engineer·Hiring Manager Screen

Jul 2026
Interviewed for a Customer Success Manager role at Microsoft, just one scenario-based question about handling an escalation. Pretty short interaction but the question itself made me think more than I expected.
  • A customer calls you urgently saying their support ticket has been ignored. How do you handle it?

“My first instinct was to jump straight to 'escalate internally' but I caught myself and backed up a bit.”

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Microsoft·Software Engineer·Hiring Manager Screen

Jul 2026
Behavioral screen at Microsoft, focused entirely on how my current team is structured and how I operate within it. Pretty conversational but they went deeper than I expected.
  • Tell me about your current team: how big is it, how is work divided up, and what does the mix of roles and seniority look like?

“I rambled a bit on team size and then kind of lost the thread when they asked about ownership structure.”

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