The 4-round interview was well-structured:

• The first round tested algorithmic skills on HackerRank with a medium-level graph problem.
• The next two technical sessions deeply covered system design and C#/.NET core concepts.
• The final behavioral interview included insightful discussions about career growth.

Although I didn't receive an offer, the interviewers provided actionable feedback within 3 days, which was highly professional.

Question 1: How to serialize/deserialize a binary tree with cyclic references in C#?

Question 2: Design an API rate limiter for Azure services with sliding window logic.

Question 3: Explain async/await thread allocation differences between .NET Framework and .NET Core.