Check your skills java

- Tenets of OOPS

- Java Modifiers and Scope

- Mutable vs Immutable. ( Standard examples)

- Abstract class vs Interface

- Changing a Mutable class to Immutable

- Lazy Initialization ( extends LazyInitializer class and override initialize. Get the object with base class and get() to get that object)

- Ways to create threads (Extend thread, Implement callable, Implement runnable). Which is better and why? Purpose of Volatile ?

- Hashcode() lazy initialization?

- Inversion of Control

- Dependency Injection

- SOAP vs REST

- MVC Patterns

- Java 9 features

- Stream and Filters

-  Any thoughts about Reactive Manifesto

- Non-Blocking vs Asynchronous blocking

- CQRS Pattern in Microseconds

- Domain Driven Design with an example.

- Garbage collection (Minor and Major)

- Kurbernetes? database pooling…?

- Kafka

- Spring Boot vs Spring framework

-  Cloud Design  Patterns (Asynchronous Request and Reply, CQRS,  Event sourcing,  Retry,  Circuit Breaker, Sidecar

Ref: https://levelup.gitconnected.com/cloud-design-patterns-explained-simply-113c788b33ff