1p3a Experience · May 2026

microsoft ai copilot software engineer interview experience and questions

SWE Phone Screen newgrad
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Interview Experience

海投的 电面:memory allocation,就是有一片连续的内存 n个units,支持操作:分配大小为X的内存、删除一片制定内存。我直接用了双向链表,分配的时候直接选找到的第一块内存。自己写test case。 Onsite 1: SD,设计chatbot的personalization / memory system(text only)。这个我没有做过,但大概猜测就是用RAG去实现。面试官问挺细的。 面试官问了:个人历史里有互相冲突的信息,那应该如何取回;每次生成回复都有retrieve,有没有办法提速(提示了可以用预先生成的personal summary);如果历史过多,怎么办; feedback loop。 Onsite 2:coding,实现一个in memory db。实现一个支持插入记录、根据row id删除记录、更新记录、取回记录的数据系统。 实现上,lz直接用了python dict应该没有难度;难点在于测试的框架,lz不太了解,所以把几个文件反复看了好一会儿,过了20分钟才开始写代码。 测试的api类似于这样: def te...

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This question was reported by a candidate who interviewed at Microsoft. LeakCode aggregates interview reports from 10+ sources, including 1Point3Acres, Glassdoor, LeetCode Discuss, Blind, Reddit, Indeed, and Nowcoder. Each report is translated where necessary, deduplicated against existing entries, and tagged by company, role, round type, and reporting date.

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For broader preparation context, the Microsoft interview process typically includes a recruiter screen, one or two technical phone screens, and a 4-5 round on-site loop covering coding, system design (at L4+ levels), and behavioral. Reports tagged on LeakCode show the round-by-round distribution and typical difficulty calibration. To browse questions filtered by round type and seniority, use the company hub linked above.

How To Practice This Type of Question

Solve similar problems on LeetCode under timed conditions (25-35 minutes per medium difficulty). The goal is pattern recognition: recognize the underlying technique (sliding window, two-pointer, BFS, memoized recursion, etc.) within 60-90 seconds of reading. Strong candidates verbalize their hypothesis out loud before coding, then iterate based on feedback. Weak candidates dive into implementation immediately, lose time on the wrong approach, and run out of time for follow-ups.

Companies update their question pools every 2-4 months. The exact wording of any given question may have been retired by the time you interview. Focus your prep on the pattern, not the specific problem. The patterns that appear in Microsoft reports consistently are the ones worth investing in; one-off niche problems are not.

During Your Microsoft Round

Apply the standard interview round template: clarify requirements (2-3 minutes), state your approach out loud and confirm direction with the interviewer (3-5 minutes), code with narration (15-25 minutes), test with concrete examples including edge cases (5 minutes), discuss optimization or trade-offs if time permits (5 minutes). This template is universally accepted across FAANG and adjacent companies; deviating from it produces weaker interviewer feedback signal.

The single most predictive failure mode in Microsoft reports tagged "no hire": not asking clarifying questions. Interviewers are explicitly trained to weight this. Strong candidates ask 3-5 clarifying questions even on problems that look obvious; weak candidates dive into code immediately. The clarifying-question check is often the first signal recorded in the interviewer's written notes.