Parvin Etibarli Java

+1. JVM memory areas. Thread safe memory areas, Garbage collector working principle, Java reference types +2. SOLID +3. Collection API: How does HashMap work under the hood, hash collision, Concurrent HashMap +4. Equals and HashCode contract -5. Thread, Volatile vs Synchronized, atomic variables(CAS-compare and swap). How to prevent deadlock. Deadlock vs livelock. Reentrant lock. +6. Error vs Exception +7. Immutable class(how to make object properties immutable, immutable collections) 8. DB index type(clustered, non clustered, composite) 9. DB normalization and denormalization 10. RDBMS vs non RDBMS +11. ACID vs BASE. Lock mechanism 12. Hash eviction policy(TTL, LRU, FIFO, LFU, MRU, random replacement, ARC). Problem: we have 2GB memory, how to store 15GB data in this cache +13. entity lifecycle +14. dirty check, flush 15. cascade types +16. n+1 problem (entity graph, join fetch) +17. lazy initialization exception 18. idempotency, safe in rest methods 19. IOC, DI, Proxy 20. AOP(cross cu...