Java Full Stack Interview Questions and Answers
Java Full Stack Interview Questions and Answers. Java full stack refers to the development of web applications using Java technologies for both front-end and back-end development. A full stack Java developer is responsible for designing, developing, and maintaining web applications using Java-based technologies, which includes server-side technologies like Java Servlets, JavaServer Pages (JSP), Java Server Faces (JSF), Spring, and Hibernate for back-end development, and client-side technologies like HTML, CSS, JavaScript, and JavaScript frameworks like Angular, React, or Vue.js for front-end development.
Here are some common Java full stack interview questions and answers :
- What is Spring Framework, and how does it work?
Answer: Spring Framework is an open-source Java-based framework used for building web applications. It provides various features and modules that help in creating loosely coupled and scalable applications. Some of the essential features of Spring Framework are Dependency Injection (DI), Aspect Oriented Programming (AOP), and Inversion of Control (IoC).
- Explain the difference between JDBC and Hibernate.
Answer: JDBC is a Java-based API used for connecting Java applications to databases. Hibernate is an ORM (Object-Relational Mapping) framework that maps Java objects to database tables. While JDBC is a low-level API, Hibernate is a high-level framework that abstracts the complexity of database operations.
- What is REST API, and how does it work?
Answer: REST (Representational State Transfer) is a web-based architecture used for building web services. RESTful web services use HTTP protocols to perform CRUD (Create, Read, Update, Delete) operations on resources. RESTful services work based on the client-server model and stateless communication.
- What is AngularJS, and how does it work with Java?
Answer: AngularJS is a popular JavaScript framework used for building dynamic web applications. It works with Java by using RESTful APIs to communicate between the front-end and back-end. AngularJS can be integrated with Java frameworks like Spring and Struts.
- What is the difference between a servlet and JSP?
Answer: Servlets and JSP are both Java-based technologies used for building web applications. Servlets are Java classes that receive requests and send responses back to the server. JSPs, on the other hand, are used for creating dynamic web pages. Servlets are used for handling business logic, while JSPs are used for presentation logic.
- Explain the MVC architecture.
Answer: The MVC (Model-View-Controller) architecture is a design pattern used for building web applications. It separates an application into three components: the model (data layer), the view (presentation layer), and the controller (business logic layer). The model represents the data, the view represents the user interface, and the controller acts as an intermediary between the model and the view.
- How do you handle exceptions in Java?
Answer: In Java, exceptions are handled using try-catch blocks. The try block contains the code that might throw an exception, while the catch block catches the exception and handles it. Java also provides a finally block that executes regardless of whether an exception occurs or not.
These are some common Java full stack interview questions and answers. However, you should also prepare for questions related to specific Java technologies and frameworks that the company is using.
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