Round 1 : Basic Java questions around MultiThreading, Collections, Streams, immutable class, Spring Annotations
And one coding problem was asked.
Reduce the number until that number itself become a prime number. Operation to reduce is get all the prime factors of a number and get the sum of all and then again the sum will be the new number and in the same way you need to do the operation and reduce it

Round 2 :
Two basic spring boot project was asked to build:
1 : Implement Spring security
2 : Build a currency converter (currency rates needs to be updated in the every 24 hours and it needs to be fetched from a third party api.)