The first round was a HackerEarth test of 90 minutes, with 10 MCQs and two coding problems.

I was able to solve the MCQs and one programming question. The MCQs were basic Java-related questions and a few output questions.

The next round was a Zoom call with a senior member of Rakuten.

What are immutable objects, their properties, and how can you make a queue immutable?

How to implement JWT for securely sharing resources in your application.

Problem-solving question: Find the minimum distance between duplicate elements present in an array.

How to implement custom properties files in a Spring Boot project, and Spring annotations-related questions.

How to use JUnit to test endpoints in a Spring Boot app? What is the use of Mockito?

Asked questions related to UNIX commands like grep, cp, etc.