What are oops concepts, What are java8 features, functional interface, spring boot annotations, microservice.

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Answering questions related to OOPs concepts, Java8 features, functional interface, Spring Boot annotations, and microservices.

OOPs concepts include encapsulation, inheritance, abstraction, and polymorphism.
Java8 features include lambda expressions, streams, default methods, and functional interfaces.
Functional interface is an interface with only one abstract method and can be used with lambda expressions.
Spring Boot annotations include @RestController, @RequestMapping, @Autowired, and @Component.
Microservices are a software development technique that structures an application as a collection of small, independent services.

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