WSP Interview Questions and Answers

JPA is a specification while Hibernate is an implementation of JPA. JPA provides a standard API for ORM frameworks.

• JPA is a standard API for ORM frameworks

• JPA provides a vendor-neutral interface

• JPA allows for easy switching between ORM frameworks

• Hibernate is an implementation of JPA

• Hibernate provides additional features beyond JPA

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, @Auto...read more

Spring has four scopes: Singleton, Prototype, Request, and Session.

• Singleton scope creates a single instance of a bean.

• Prototype scope creates a new instance of a bean every time it is requested.

• Request scope creates a new instance of a bean for each HTTP request.

• Session scope creates a new instance of a bean for each HTTP session.

MySQL GROUP BY is used to group rows with same values. DISTINCT is used to remove duplicate values from a column.

• GROUP BY is used with aggregate functions like COUNT, SUM, AVG, etc.

• DISTINCT is used to retrieve unique values from a column.

• GROUP BY and DISTINCT can be used together to group and retrieve unique values.

• Example: SELECT COUNT(*) FROM table_name GROUP BY column_name;

• Example: SELECT DISTINCT column_name FROM table_name;

Spring Boot is a framework that simplifies Spring development by providing pre-configured settings and dependencies.

• Spring Boot is built on top of the Spring framework.

• Spring Boot provides a standalone executable that can run the application.

• Spring Boot provides auto-configuration, which reduces the need for manual configuration.

• Spring Boot provides a wide range of starter dependencies that can be easily added to the project.

• Spring Boot is ideal for building microservices and...read more

Different scopes available in software testing

• Unit testing: Testing individual components or modules of the software

• Integration testing: Testing the interaction between different components or modules

• System testing: Testing the entire system as a whole

• Acceptance testing: Testing the software against user requirements

• Regression testing: Testing to ensure that changes or fixes do not introduce new issues

• Performance testing: Testing the software's performance under various condi...read more