SOLID principles, DDD, CQRS, Concurrent dictionaries in C#, but the most concentration was on Kafka (including some configuration details) and they were describing some specific scenarios with Kafka events and asking for my solutions in such use cases, including database transactions handling.
Java native threads vs virtual and something about map structure i suppose)
1. CRUD over HTTPS: They asked questions about implementing RESTful endpoints (POST, GET, PUT, DELETE) and handling HTTP requests correctly. 2. Code organization: They emphasized writing clean code, making each function do one clear job. This tested my ability to structure code for maintainability. 3. Callback function challenge: There was a small coding exercise involving streams and callbacks, where I had to select a random element fairly from a stream of data.
Second round was system design
Role based authentication
System Design Here I was asked to design a system to deal with a typical Ecommerce flow and to show system design / database structure.
They asked in everything about the technologies I use
speak about previous experience rest api actions how to refresh ui on realtime speak about an issue that you managed to resolve in your previous job
In my opinion, what a senior developer has that a junior doesn't.
The best way to get nested object key values as a string
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