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Microsoft interviews cover DSA, system design, and culture/growth mindset behavioral questions.
Serialize and deserialize a binary tree.
How to approach it
BFS-level order with null markers.
Design Microsoft Teams messaging system.
How to approach it
WebSocket for real-time, Cassandra for chat history.
Tell me about a time you learned from failure.
How to approach it
Growth mindset — the learning is the point.
What is a mutex vs semaphore?
How to approach it
Mutex = binary ownership, semaphore = counting permit.
Find the median of two sorted arrays.
How to approach it
Binary search on shorter array; O(log(min(m,n))).
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