Important Interview Questions About Spring

Q6: Where do you need to define properties in the Spring Boot?

Ans: In a file named, you can describe application and Spring boot associated properties. There are two ways to make this file: manually or by spring initializer. However, if you use Initializer to create this file, it would be empty.

For loading the file, there is no configuration required to instruct Spring Boot. When it is present in classpath, Spring Boot loads and configure it automatically. It manages handles the application code accordingly.

For instance, in Spring Boot, to alter the embedded server port (you can use them with applications to perform activities in high-workload environments), you can use it to define a property.

Q7: What do you mean by a Spring configuration file?

Ans: Basically, an XML file is a spring configuration file. Most importantly, this file has the classes information. Here, these classes are defined, configured, and introduced to each other. The XML configuration files are wordy and organized.

It is essential to plan and write it properly. If they are not correctly, it becomes cumbersome to manage extensive projects. With the help of this file, the life cycle of a spring bean is controlled by the spring container. Additionally, it is a way to obtain Dependency Injection. If you have a primitive type or in case, when the dependency is a reference, use //.

Q8: List the components of a Spring application?

Ans: Usually, a Spring application contains the components given below:

  • Interface: the purpose of the interface is to define the functions. It provides improved readability when you need to view what the class does rather than stressing over how it does it. There can be several implementations on how you can do it. Spring allows you to shift smoothly between various implementations.
  • Bean class: has properties. And, it contains functions, the methods for returning the variable values and setting the value, etc.
  • Spring Aspect-Oriented Programming (AOP): to enable the functionality for cross-cutting concerns, it is used.
  • Bean Configuration File: it has the information of classes. In this way, it configures them.
  • User program: utilizes the function.

Q9: Cite the different ways of using Spring Framework?

Ans: It is possible to use the spring framework in multiple ways.

  • Web Applications: it makes the process of building web applications rapid and less time-consuming. It can get rid of the majority of boilerplate code and configuration linked with web development. As a result, you obtain a modern web programming model. This helps in the development of server-side HTML applications, REST APIs, etc.
  • Third-party web framework: For this, you can use Spring Frameworks middle-tier.
  • You can utilize it for remote use.
  • It can wrap POJOs that are already present as Enterprise Java Bean.

Q10: What is Spring IOC Container?

Ans: The Spring container is the heart of the spring framework. The task of the container is to generate the objects and wires them together. Furthermore, it configures them and handles their complete life cycle. The Spring container utilizes the Dependency Injection to make sure that the components that build an application are functioning as they should. From the configuration metadata, the container gets instructions for the objects (beans) to exemplify, configure, and assemble.

This metadata is given in the form of XML, Java annotations, or Java code. The interface ApplicationContext represents the IoC container in this framework.