Microsoft software engineer interview questions
Prepare for Microsoft coding, design, collaboration, and growth-mindset interview questions.
Practice guide: Interview content varies by role, level, team, and location. These representative prompts are based on public company guidance and general interview patterns; Microsoft does not endorse this guide.
6 questions, one at a time
Coding questions
Each problem has a full statement, examples, constraints, and a tested solution in Python, Java and C++.
System design questions
Turn requirements into APIs, data models, architecture choices, bottlenecks, and explicit trade-offs.
Behavioral questions
Prepare truthful evidence of decisions, ownership, collaboration, learning, and measurable results.
How the Microsoft interview is structured
This practice guide follows Microsoft’s public technical-interview guidance: demonstrate problem solving, design, coding, testing, and clear thinking. The prompts are representative practice, not an official question list.
That shapes how you should prepare. The rounds in this guide break down as 3 coding, 1 system design, 2 behavioral, and they are not interchangeable — a coding round rewards a working solution reasoned aloud, a system design round rewards explicit trade-offs, and a behavioral round rewards a specific story with a measurable result. The fastest way to lose a round you could have passed is to prepare for all three the same way.
What the coding round checks
Each problem has a full statement, examples, constraints, and a tested solution in Python, Java and C++.
- Sorting, boundary reasoning, and the ability to explain complexity.
- Tree traversal, understanding the full BST rule, and handling integer edge cases.
- Careful index management, loop invariants, and testing awkward shapes.
What the system design round checks
Turn requirements into APIs, data models, architecture choices, bottlenecks, and explicit trade-offs.
- Event modeling, user preferences, delivery reliability, and scale.
What the behavioral round checks
Prepare truthful evidence of decisions, ownership, collaboration, learning, and measurable results.
- Self-awareness and proof that feedback produced a durable behavior change.
- Decision criteria, stakeholder alignment, and conscious trade-offs.
Follow-up questions to be ready for
Most candidates prepare a first answer and stop. The round is usually decided by what comes after it — these are the follow-ups the questions in this guide lead to:
- Can it be done without sorting?
- What if input is streamed?
- How would you preserve labels?
- Can you solve it recursively with bounds?
- How would you find two swapped nodes in an almost-valid BST?
- What if the tree is too deep for recursion?
- Can you fill an n × n matrix with 1 to n² in spiral order?
- How would you walk the spiral counter-clockwise?
Mistakes that cost people the Microsoft round
Collected from the questions in this guide. None of them is about knowing less — they are all about how an answer is delivered under time pressure:
- Missing the touching-boundary rule
- Mutating unexpectedly
- No complexity analysis
- Comparing a node only with its direct children
- Using INT_MIN or INT_MAX as a sentinel
- Allowing equal values without asking
- Reading the last row or column twice
- Off-by-one boundaries on non-square matrices
Common questions
What does Microsoft test in a software engineer interview?
This practice guide follows Microsoft’s public technical-interview guidance: demonstrate problem solving, design, coding, testing, and clear thinking. The prompts are representative practice, not an official question list.
What is in this Microsoft question list?
6 representative practice questions — 3 coding, 1 system design, 2 behavioral. Each one comes with what the interviewer is checking, a three-step plan for the answer, the follow-ups that usually come next, and the mistakes that cost people the round. Coding questions also carry a full problem statement, examples, constraints and tested solutions in Python, Java and C++.
Are these real Microsoft interview questions?
No — and treat any site claiming otherwise with suspicion. These are representative prompts based on public company guidance and general interview patterns. Interview content varies by role, level, team and location, and Microsoft does not endorse this guide.
What should I focus on first for Microsoft?
Coding fundamentals, Design, Growth mindset, Collaboration. Work the question types in that order rather than grinding only coding problems: the rounds that trip people up are usually the ones they did not rehearse out loud.