Spring Interview Question and Answers for fresher and experienced part 2 | Code Decode

In this video of code decode we have covered most asked spring interview questions and answers for freshers and experienced Udemy Course of Code Decode on Microservice k8s AWS CICD link: https://openinapp.co/udemycourse Course Description Video : https://yt.openinapp.co/dmjvd What do you mean by IoC (Inversion of Control) Container? Represents the inversion of responsibility of object creation, initialization and destruction (life cycle management) from application to Spring Container. In normal Programming, we create object with New Keyword. In Spring We depend on Container to provide us with the required dependency Object. How is the configuration metadata provided to the spring container? There are 3 ways of providing the configuration metadata. XML based Annotation Based : Instead of the XML approach, the beans can be configured into the component class itself by using annotations on the relevant class, method, or field declaration. Annotation wiring is not active in the Spring container by default. This has to be enabled in the Spring XML configuration file as shown below: context:annotation-config Java configuration Based: Spring Framework introduced key features as part of new Java configuration support. This makes use of the @Configuration annotated classes and @Bean annotated methods. Note that: @Bean annotation has the same role as the bean element. Classes annotated with @Configuration allow to define inter-bean dependencies by simply calling other @Bean methods in the same class Difference between Applicationcontext and Beanfactory IOC Container What are the bean scopes available in Spring? There are 5 scopes available : Singleton: The scope of bean definition while using this would be a single instance per IoC container. Prototype: Here, the scope for a single bean definition can be any number of object instances. Request: The scope of the bean definition is an HTTP request. Session: Here, the scope of the bean definition is HTTP-session. Global-session: The scope of the bean definition here is a Global HTTP session. What is a Spring configuration file Spring configuration file is a file with .xml extension and the file contains information about the classes and interfaces and their dependencies. Using this file the spring container controls the life cycle of a spring bean and achieve Dependency Injection. What do you understand by Dependency Injection? IOC is achieved Through DI in spring. In DI you don’t create objects, you describe how they should be created. It can be done in two ways : Constructor Injection : Here, the IoC container invokes the class constructor with a number of arguments where each argument represents a dependency on the other class. Setter Injection: Here, the spring container calls the setter methods on the beans after invoking a no-argument static factory method or default constructor to instantiate the bean. For non primitive properties, we can use Autowire feature. If you use autowiring, spring container automatically initialises the dependencies of that bean. Beans are fetched from contents of application context. Difference between Constructor and setter Injection? Types of Auto Wiring? There are 4 types of autowiring: byType byName constructor No Promotional Links Registration link:https://relvl.co/cb2 Most Asked Core Java Interview Questions and Answers :    • Core Java frequently asked Interview Quest...   Advance Java Interview Questions and Answers :    • Advance Java Interview Questions   Java 8 Interview Questions and Answers :    • Java 8 Interview Questions(New Features)   Hibernate Interview Questions and Answers :    • Hibernate Interview Questions Java   Spring Boot Interview Questions and Answers :    • Advance Java Interview Questions   Angular Playlist :    • Angular Course Introduction || Angular 8   GIT :    • GIT   Subscriber and Follow Code Decode Subscriber Code Decode : https://www.youtube.com/c/CodeDecode?... Linkedin :   / codedecodeyoutube   Instagram :   / codedecode25   #codedecode #springconcept #springinterviewquestions