Spring framework targets to make Java EE development easier to use and promote good programming practice by enabling a POJO-based programming model. The objects that form the backbone of the users application and that are managed by the Spring IoC container are called beans. number of Spring interview questions and answers for experienced as Besides studying them online you may download the eBook in PDF. Dear readers, these Spring Interview Questions have been designed specially of Spring. As per my experience good interviewers hardly plan to ask any particular question they continue based on further discussion and what you answer.
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This is a summary of some of the most important questions concerning the Spring Framework, that you may be asked to answer in an interview or in an interview. + Questions and Answers on Spring, Spring Boot and Spring MVC spring- resgoderfita.tk · Adding interview questions pdf, 2 years ago . code examples; You should have some programming experience with Java and Spring. These interview questions and answers on Spring Framework will help you strengthen Framework Interview preparation PDF was generated at Saturday 10th.
That is, it is possible to let Spring resolve collaborators for your bean automatically by inspecting the contents of the BeanFactory. Explicit bean reference should be used for wiring. It matches and wires its properties with the beans defined by the same names in the XML file.
What are the limitations with auto wiring? Confusing nature: Always prefer using explicit wiring because autowiring is less precise.
In the next section, we will discuss on Spring Annotations Interview Questions. Spring Annotations — Spring Interview Questions Instead of using XML to describe a bean wiring, the developer moves the configuration into the component class itself by using annotations on the relevant class, method, or field declaration.
It acts as an alternative to XML setups. By default, Annotation wiring is not turned on in the Spring container. It is a generic stereotype for any Spring-managed component. The component-scanning mechanism of spring now can pick it up and pull it into the application context.
Beans marked with it are automatically imported into the Dependency Injection container. Service: This annotation is a specialization of the component annotation. It provides additional benefits specifically for DAOs. What do you understand by Required annotation?
If the affected bean property has not been populated, the container will throw BeanInitializationException. What do you understand by Autowired annotation? This annotation is used to autowire bean on the setter methods, constructor, a property or methods with arbitrary names or multiple arguments. By default, it is a type driven injection. What do you understand by Qualifier annotation? For example, here we have two classes, Employee and EmpAccount respectively.
In EmpAccount, using Qualifier its specified that bean with id emp1 must be wired. What do you understand by RequestMapping annotation? Describe Spring DAO support? This allows one to switch between the persistence technologies easily. A spring application consists of the following components: The functions in spring are defined by the interface.
Bean class: It consists of the properties, its setter-getter methods, other functions etc. In spring AOP provides for the functionality of crosscutting concerns.
User program: It uses the function to implement. Explain Dependency Injection and its types? What does Weaving mean?
Weaving is the process by which aspects can be linked with other application objects for creating the required object. What is an Advice? What are the different types of Advices? An Action, which is taken by any aspect at a particular join point, is called an Advice. AOPs use an advice as an interceptor that maintains a train of interceptors near the join point. Various types of advice are as follows: These are types of advices, which get executed before the join point methods and can be configured using Before annotation mark.
After returning: These are the types of advices which get executed after the join point methods completes executing and the annotation mark used to configure it is AfterReturning After throwing: These are the types of advices that execute only and only if join point method returns by exiting an exception and annotation mark used to configure it is AfterThrowing.
After finally: These are the types of advices that get executed before and after a join point and can be configured using the Around annotation mark.
Spring Interview Questions.pdf
What are the differences between Bean Factory and Application Context? The differences between Bean Factory and Application Context are as follows: Bean Factory is an interface defined in org.
BeanFactory, while Application Context is an interface defined, is org. What are the various ways in which Spring Framework can be used? There are many ways in which Spring Framework can be used.
They are listed as follows: It can be used as a full time Spring web application. Using Spring Frameworks middle-tier, it can be used as a third-party web framework. It can be used for remote usage. What is a Join point? Join point is a point in an application where one can initialize an AOP aspect. One can also define it as the exact place in the application where an action is said to take place while using spring framework.
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How to use spring boot to configure different datasources? What do you mean by spring beans?
What does bean scopes spring support? Explain each. A bean is an object that is initialized, put together, and is managed by a Spring IoC container. The beans are created with the help of configuration metadata that are supplied to the container by the users. This is the scope that the bean defines to a single instance for each Spring IoC container.
This is the scopes that a bean defines to have any number of object instances. This is the scopes that a bean defines as per HTTP requests.
This is valid in the form of a web-aware Spring Application Context Session: This is the scopes that a bean defines to an HTTP session. This is valid in the form of a web-aware Spring Application Context Global-session: This is the scopes that a bean defines to a global HTTP session. This is valid in the form of a web-aware Spring Application Context.
Explain Inversion of Control, how to implement it.It also allows to declaratively bind request parameters to business objects. What is a Join point? Ready to use: What are different types of Spring Bean autowiring? The basic approach is similar: How do you have different configuration for different environments?
Top 50 Spring Interview Questions You Must Prepare In 2019
How do you create an application context with Spring? Annotation wiring is not turned on in the Spring container by default. Purdianta Yo.
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