R1 :

1. Coding question which is solved using max heap
2. XML deserializer implementation.

R2:

1. union find question around connected components
2. Java concurrency question on how to implement strictly alternating threads printing even and odd numbers

R3 :

1. Simple dp - colouring houses with 3 colours at minimum cost. Cost Matrix is given. Consecutive houses should not be coloured same
2. IO and NIO in Java
3. Url class loader usage to load jars dynamically
4. Implement url shortening service hashing logic using Base62

R4: Hiring manager round

1. Previous complex Project experience and understanding of every minute technologies used. How is it technically challenging.
2. Super and extends usage in generics
3. How would you design something like a threadlocalstorage in a new programming language
4. How would you design a debugger for a new programming language
5. Design git diff feature HLD and implementation that gives the diff of file names not file contents
6. Conflicts resolution questions
7. And many more. Interview went on for 2 hours

R5 : Bar raiser round because of mixed feedback

1. Previous Project and tech stacks used
2. High Availability, Active-active vs active-passive
3. Distributed transaction - How would you implement compensating transaction to rollback
4. Kafka vs RabbitMQ
5. n cm size Cube is given
   a. How many 1cm cubes can be cut
   b. If the cube is colored red on the outside how cubes are colored exactly 2 faces red