e2open Interview Questions and Answers

To write a REST API from scratch, I would follow these steps:

• Define the resources and endpoints

• Choose a programming language and framework

• Implement CRUD operations for each resource

• Use HTTP methods and status codes correctly

• Add authentication and authorization

• Test the API using tools like Postman

• Document the API using tools like Swagger

Objects in Java can be created in multiple ways, including using new keyword, cloning, deserialization, and reflection.

• Using the 'new' keyword

• Cloning an existing object

• Deserialization from a file or network

• Using reflection to create objects dynamically

Some common Springboot annotations used in projects are @RestController, @Autowired, @RequestMapping, @Service, @Component, @Repository.

• @RestController - Used to define RESTful web services.

• @Autowired - Used for automatic dependency injection.

• @RequestMapping - Used to map web requests to specific handler methods.

• @Service - Used to indicate that a class is a service.

• @Component - Used to indicate that a class is a Spring component.

• @Repository - Used to indicate that a class is ...read more

Interface is a contract that defines the methods a class must implement, while abstract class can have both implemented and abstract methods.

• Interface methods are public and abstract by default, while abstract class can have abstract and non-abstract methods.

• A class can implement multiple interfaces but can only inherit from one abstract class.

• Interfaces are used to achieve multiple inheritance in Java, while abstract classes are used to provide a common base for subclasses.

• E...read more

Serialization is the process of converting an object into a format that can be easily stored or transmitted.

• Serialization is used to convert complex data structures or objects into a stream of bytes.

• Serialized data can be stored in files, databases, or sent over a network.

• Common serialization formats include JSON, XML, and Protocol Buffers.