Yes, we can load multiple configuration file in spring by using the <import> tag in applicationContext.xml.

Directly we can not inject value in static variables in spring but by creating non-static setter we can inject the value.

Because Spring is only responsible for creating a single object per bean and maintaining the life cycle of that object.

Using Spring Expression language, we can wire value with the property at runtime.

Spring has a tag ‘idref’ using the tag it can validate the existence of other bean at deployment time.

Using Coordination Layer spring can connect API with cloud.

Empty string as a value can be passed by using “ ” as a value in the property and special </null> element can be used to pass null value in the property in spring.

By Implementing the DisposableBean interface, it will call Destroy method internally for destruction of Bean from the Container.

5.0 Spring5.0 support for Reactive Programming and kotlin.

Exception handling needs to be done manually in JDBC but in Spring JDBC,
Exception handling is not manually done.

Spring AOP:
• It Support inly method level point cut.
• It is DTD Based
• Runtime Weaving is done through proxy
AspectJ AOP:
• It Supports field level pointcut
• It Is schema based.
• Only Compile Time Weaving is Done.

FileSystemXmlApplicationContext, ClassPathXmlApplicationContext and WebXmlApplicationContext.

Following are the cases in which AutoWiring may not work:
We cannot Autowire primitive datatypes directly. Using Wrapper class of the Primitive datatypes we can Autowire them.
There are possibilities of overriding if we define dependency using setter or constructor arg.
It is Confusing in nature.

Yes, we can define more than one DispatcherServlet.

It is a lightweight, approximately coupled and coordinated system for creating endeavor applications in java.

• Predefined Templates
• Loose Coupling
• Easy to test
• Lightweight
• Fast Development
• Powerful Abstraction
• Declarative help

• Test
• Spring Core Container
• AOP, Aspects and Instrumentation
• Data Access/Integration
• Web

IOC (Inversion of Control) and DI (Dependency Injection) is a structure example to give free coupling. It expels the reliance from the program.

We should compose a code without following IOC and DI.

public class Employee{

Address location;

Employee(){
address=new Address();//making example
}
}
Presently, there is reliance among Employee and Address since Employee is compelled to utilize a similar location occasion.
We should compose the IOC or DI code.
public class Employee{
Address location;
Employee(Address address){
this.address=address;//not making case
}
}

Presently, there is no reliance among Employee and Address since Employee isn’t compelled to utilize a similar location case. It can utilize any location occasion.

IOC holder is mindful to:

create the case

configure the case, and

assemble the conditions

There are two kinds of IOC compartments in spring structure.

• BeanFactory
• ApplicationContext

BeanFactory is the fundamental compartment though ApplicationContext is the propelled holder. ApplicationContext expands the BeanFactory interface. ApplicationContext gives a greater number of offices than BeanFactory, for example, coordination with spring AOP, message asset taking care of for i18n and so on.

Autowiring empowers the software engineer to infuse the bean consequently. We don’t have to compose express infusion rationale.

We should see the code to infuse bean utilizing reliance infusion.

<bean id=”emp” class=”com.javatpoint.Employee” autowire=”byName”/>

Singleton degree ought to be utilized with EJB stateless session bean and model extension with EJB stateful session bean.

• Spring structure gives two kind of exchange the executives underpins:
• Programmatic Transaction Management: ought to be utilized for few exchange activities.
• Declarative Transaction Management: ought to be utilized for some exchange activities.

Less code: By utilizing the JdbcTemplate class, you don’t have to make connection,statement,start transaction,commit exchange and close association with execute distinctive questions. You can execute the question straightforwardly.

• JdbcTemplate
• SimpleJdbcTemplate
• NamedParameterJdbcTemplate
• SimpleJdbcInsert
• SimpleJdbcCall

You can get records from the database by the question strategy for JdbcTemplate. There are two interfaces to do this:

• Result Set Extractor
• Row Mapper

NamedParameterJdbc Template class is utilized to pass an incentive to the named parameter. A named parameter is superior to ? (question mark of Prepared Statement).

The SimpleJdbcTemplate underpins the component of var-args and autoboxing.

AOP is an abbreviation for Aspect Oriented Programming. It is an approach that separates the program rationale into pieces or parts or concerns.

It expands the seclusion and the key unit is Aspect.

AOP empowers you to progressively include or expel worry previously or after the business rationale. It is pluggable and simple to keep up.

AOP phrasings or ideas are as per the following:

• Advice
• Pointcut
• Aspect
• Introduction
• Target Object
• Interceptor
• AOP Proxy
• Weaving
• JoinPoint

JoinPoint is any point in your program, for example, field get to, strategy execution, special case dealing with and so forth.

No, spring system bolsters strategy execution joinpoint as it were.

Exhortation speaks to move made by viewpoint.

There are 5 kinds of advices in spring AOP.

• Before Advice
• After Advice
• After Returning Advice
• Throws Advice
• Around Advice

Pointcut is articulation dialect of Spring AOP.

Angle is a class in spring AOP that contains advices and joinpoints.

Presentation speaks to presentation of new fields and strategies for a sort.

Target Object is an intermediary question that is exhorted by at least one perspectives.

Interceptor is a class like viewpoint that contains one counsel as it were.

Weaving is a procedure of connecting viewpoint with other application.

No, spring system performs weaving at runtime.

There are 3 AOP usage.

• Spring AOP
• Apache AspectJ
• JBoss AOP

The @Controller explanation denotes the class as controller class. It is connected on the class.

The @RequestMapping explanation maps the demand with the strategy. It is connected on the strategy.

The View Resolver class settle the view part to be summoned for the demand. It characterizes prefix and postfix properties to determine the view segment.

The org.springframework.web.servlet.view.InternalResourceViewResolver class is broadly utilized.

Truly.