Anchanto Java Developer Interview Questions and Answers

Spring Boot simplifies Java application development with embedded servers and auto-configuration.

• Spring Boot uses 'starter' dependencies to simplify project setup. Example: 'spring-boot-starter-web' for web applications.

• It provides embedded servers like Tomcat or Jetty, allowing you to run applications without external server setup.

• Auto-configuration automatically configures your application based on the dependenc...read more

Multithreading in Java allows multiple threads to execute concurrently, improving performance and responsiveness.

• Multithreading allows multiple tasks to run concurrently within a single program

• Threads share the same memory space, allowing for efficient communication and data sharing

• Java provides built-in support for multithreading through the Thread class and Runnable interface

• Example: Creating a new thread by ext...read more

Object Oriented Programming (OOP) is a programming paradigm based on the concept of objects, which can contain data and methods.

• Encapsulation: Bundling data and methods that operate on the data within one unit (e.g., a class).

• Inheritance: Mechanism to create a new class using properties and methods of an existing class (e.g., class Dog inherits from class Animal).

• Polymorphism: Ability to present the same interface...read more

Unit testing focuses on testing individual components in isolation, while integration testing focuses on testing how multiple components work together.

• Unit testing is done on individual units or components of a software application, such as functions or classes.

• Integration testing is done to test how different units or components work together as a whole system.

• Unit testing is usually done by developers during the...read more

To write an API, define endpoints, request/response formats, authentication, and documentation.

• Define endpoints for different functionalities (e.g. GET /users, POST /users)

• Specify request and response formats (e.g. JSON)

• Implement authentication mechanisms (e.g. OAuth)

• Document the API using tools like Swagger or Postman