I ultimately went through four rounds of technical interviews. This was due to the fact that the original role I was applying for was filled by someone else internally, but they thought I would be good for another role that opened up on a different team.

For the first position, it was two rounds of technical questions with engineers on the team. This was a full stack role, so they asked questions about React and Java (language paradigms). They also asked me some simple algorithm questions to code.

The second interview was also two rounds, but with a team lead and architect in the first round and a hiring manager in the second round. Their questions were again related to React and Java language paradigms, as well as some API and system design-related questions.

I was given an offer but decided to decline because I preferred to be in a permanent role immediately rather than contract to hire.

What is the difference between a React class component and a function component?

What are the React lifecycle methods, and in what order do they appear?

How would you write the lifecycle methods using hooks?

How does React work internally? What makes it fast?

What is a React component?

Write a Java function to remove all vowels from a string.

What makes an API RESTful?

What are WebSockets and webhooks, and how are they used?

How does authentication work?

Describe how you would design a web application from frontend to backend.