Anchanto Java Developer Interview Questions and Answers

Multithreading involves executing multiple threads concurrently within the same process, while asynchronous programming allows tasks to be executed independently of the main program flow.

• Multithreading involves multiple threads running concurrently within the same process, sharing resources and potentially causing synchronization issues.

• Asynchronous programming allows tasks to be executed independently of the main program flow, enabling non-blocking operations and improved pe...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 development phase, while integration testing is typically done...read more

Object Oriented Programming is a programming paradigm based on the concept of objects, which can contain data in the form of fields and code in the form of procedures.

• OOP focuses on creating objects that interact with each other to solve problems.

• Encapsulation is a key concept in OOP, where data is kept private within a class and accessed through public methods.

• Inheritance allows classes to inherit attributes and methods from other classes.

• Polymorphism enables objects to be t...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

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 extending the Thread class or implementing the Runnable interface