Papaya Global | SDE (Backend)

Round 1

Questions:

1. Zigzag traversal in binary tree
2. LLD of snake and ladder (Only discussion) - Global variables vs instance variables
3. Design Patterns - Factory design pattern discussion
4. Explain SOLID principles
5. Explain OOPs concepts
6. Spring boot - What is the use of annotations.
7. Explain concept of ORM and JPA
8. Question on autowiring of an interface which has 2 different implementations
9. Explain EKS and its use
10. Explain S3, EC2 and Lambda
11. Profiling
12. Exceptions in Java - checked and unchecked exceptions
13. Threads in Java - how to use multithreading
14. Streams in Java - why are they used