Capgemini Interview Questions and Answers

Authorization and authentication in web API can be set using various methods like JWT, OAuth, and Identity Framework.

• Use JWT (JSON Web Tokens) for token-based authentication

• Implement OAuth for secure authorization and authentication

• Utilize Identity Framework for managing user authentication and authorization

• Set up roles and policies to control access to resources

Functional interface and lambda expression to add two numbers in Java

• Create a functional interface with a method that takes two integers as parameters and returns an integer

• Implement the functional interface using a lambda expression to add the two numbers

• Call the method using the lambda expression to add two numbers

The @Peek annotation is used in Java to mark a method as a peek operation in a stream. The @Qualifier annotation is used in Spring to specify which bean should be autowired when multiple beans of the same type are present.

• The @Peek annotation is used in Java streams to perform a side-effect operation on each element without changing the elements themselves.

• The @Qualifier annotation in Spring is used to disambiguate beans of the same type by specifying the bean name to be inje...read more

Reversing a linked list involves changing the direction of pointers to go from the end to the beginning.

• Create three pointers: current, previous, and next.

• Iterate through the linked list, updating pointers to reverse the direction.

• Return the new head of the reversed linked list.

Spring Boot is an opinionated framework for building stand-alone, production-grade Spring-based applications. Spring MVC is a part of the Spring Framework for building web applications.

• Spring Boot is used for creating standalone Spring applications with minimal configuration, while Spring MVC is used for building web applications.

• Spring Boot provides auto-configuration and embedded servers for easy deployment, while Spring MVC requires more manual configuration.

• Spring Boot si...read more

OOPs concepts are fundamental principles of object-oriented programming like inheritance, encapsulation, polymorphism, and abstraction.

• Inheritance: Allows a class to inherit properties and behavior from another class. Example: Animal class can inherit from Mammal class.

• Encapsulation: Bundling data and methods that operate on the data into a single unit. Example: Using private variables and public methods in a class.

• Polymorphism: Ability of a method to do different things base...read more