SDE - 2

Static methods are useful for designing utility methods since they contain method implementation that is owned by the interface and invoked using the interface name. They cannot be overridden.

There are two primary reasons for this:
1. Due to significant developments in hardware, Java now needs to make better use of multi-core CPUs.
2. Make new Functional Programming (FP) features available to users.

The default method is found in the interface and involves an implementation. The technique extends an interface's functionality while maintaining backward compatibility with existing classes that implement the interface.

There are two ways of creating a Singleton pattern.
1. Early Instantiation : It is responsible for the creation of instance at load time.
2. Lazy Instantiation : It is responsible for the creation of instance when required.

The motive of the Adapter pattern is to make interfaces of one or more classes to look similar. The Bridge pattern is designed to isolate a class's interface from its implementation so we can vary or substitute the implementation without changing the client code.

@Controller Map of the model object to view or template and make it human readable but @RestController simply returns the object and object data is directly written in HTTP response as JSON or XML.

1. Spring framework is a java EE framework that is used to build applications. Spring Boot framework is mainly used to develop REST API’s
2. The primary feature of the Spring framework is dependency injection. The main feature of the Spring Boot is Autoconfiguration. 
3. The goal pf Spring is to make Java EE (Enterprise Edition) development easier, allowing developers to be more productive. Spring Boot provides the RAD(Rapid Application Development) feature to the Spring framework for faster application development.
4. Spring framework helps to create a loosely coupled application. Spring Boot helps to create a stand-alone application.
5. In the Spring framework to test the Spring Project, we need to set up the servers explicitly.Spring Boot offers built-in or embedded servers such as Tomcat and jetty.

Monolithic Architecture: It is "like a big container" where all the software components of an application are bundled together tightly. It is usually built as one large system and is one code-base. 
Microservice Architecture: It involves structuring an application in the form of a cluster of small, autonomous services modeled around a business domain. The functional modules can be deployed independently, are scalable, are aimed at achieving specific business goals, and communicate with each other over standard protocols.

Tip 1 : The cross questioning can go intense some time, think before you speak.
Tip 2 : Be open minded and answer whatever you are thinking, in these rounds I feel it is important to have opinion.
Tip 3 : Context of questions can be switched, pay attention to the details. It is okay to ask questions in these round, like what are the projects currently the company is investing, which team you are mentoring. How all is the work environment etc.
Tip 4 : Since everybody in the interview panel is from tech background, here too you can expect some technical questions. No coding in most of the cases but some discussions over the design can surely happen.