Spring hibernate interview questions and answers pdf

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spring hibernate interview questions and answers pdf

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I have posted a lot of Spring Tutorials recently. This post will help you get through Spring interview Questions explaining the core concepts in detail. Spring Framework is one of the most popular Java EE frameworks for web applications.

Spring Interview Questions and Answers

Name some of the design patterns used in Spring Framework? Spring Framework is using a lot of design patterns, some of the common ones are: Singleton Pattern: Creating beans with default scope. What is Spring DAO? How to integrate Spring and Hibernate Frameworks? Also, Spring ORM provides support for using Spring declarative transaction management, so you should utilize that rather than going for hibernating boiler-plate code for transaction management.

Differentiate between constructor injection and setter injection? There can be partial injection. It overrides the constructor property. It will create a new instance if any modification is done. It will not create a new instance if any modification is done. It works better for many properties. It works better for a few properties.

What are some of the best practices for Spring Framework? Answer: Some of the best practices for Spring Framework are: Avoid version numbers in schema reference, to make sure we have the latest configs. Divide spring bean configurations based on their concerns such as spring-jdbc. For spring beans that are used in multiple contexts in Spring MVC, create them in the root context and initialize with the listener. Configure bean dependencies as much as possible, try to avoid autowiring as much as possible.

For application-level properties, the best approach is to create a property file and read it in the spring bean configuration file. For smaller applications, annotations are useful but for larger applications, annotations can become a pain.

If we have all the configuration in xml files, maintaining it will be easier. Use correct annotations for components for understanding the purpose easily. Spring framework has a lot of modules, use what you need. Remove all the extra dependencies that get usually added when you create projects through Spring Tool Suite templates. If you are using Aspects, make sure to keep the join pint as narrow as possible to avoid advice on unwanted methods.

Consider custom annotations that are easier to use and avoid any issues. How many modules are there in Spring Framework and what are they? Instrumentation — This layer provides support to class instrumentation and classloader implementations. Aspects — This module provides support to the integration with AspectJ. What are the benefits of using Spring? Answer: Spring targets to make Java EE development easier.

E Learning Portal. What Spring sub-projects do you know? Answer: Describe them briefly. What is Qualifier annotation in Spring? Answer: You can have more than one bean of the same type in your XML configuration but you want to autowire only one of them, so Qualifier removes confusion created by Autowired by declaring exactly which bean is to autowired. What is Required annotation in Spring? Answer: This annotation simply indicates that the affected bean property must be populated at configuration time: either through an explicit property value in a bean definition or through autowiring.

The container will throw an exception if the affected bean property has not been populated; this allows for eager and explicit failure, avoiding NullPointerExceptions or the like later on. Suppose you have a very large application and you get NullPointerExceptions because the required dependency has not been injected then it is very hard to find out what goes wrong. So this annotation helps us in debugging the code. What are the benefits of the Spring Framework?

Answer: Lightweight: Spring is lightweight when it comes to size and transparency. The basic version of the spring framework is around 2MB. The objects give their dependencies instead of creating or looking for dependent objects. Aspect oriented AOP : Spring supports Aspect oriented programming and separates application business logic from system services.

Container: Spring contains and manages the life cycle and configuration of application objects. Transaction Management: Spring provides a consistent transaction management interface that can scale down to a local transaction and scale up to global transactions JTA.

What do you understand by Aspect-Oriented Programming? Answer: Enterprise applications have some common cross-cutting concerns that are applicable to different types of Objects and application modules, such as logging, transaction management, data validation, authentication, etc. In Object Oriented Programming, modularity of application is achieved by Classes whereas in AOP application modularity is achieved by Aspects and they are configured to cut across different classes methods.

AOP takes out the direct dependency of cross-cutting tasks from classes that is not possible in normal object oriented programming.

For example, we can have a separate class for logging but again the classes will have to call these methods for logging the data. What is the difference between Bean Factory and Application Context?

Answer: BeanFactory is an interface representing a container that provides and manages bean instances. The default implementation instantiates beans lazily when getBean is called. ApplicationContext is an interface representing a container holding all information, metadata, and beans in the application. It also extends the BeanFactory interface but the default implementation instantiates beans eagerly when the application starts.

This behavior can be overridden for individual beans. For all differences, please refer to the reference. How to define the scope of a bean? How does the scope Prototype work? Answer: Scope prototype means that every time you call for an instance of the Bean, Spring will create a new instance and return it.

This differs from the default singleton scope, where a single object instance is instantiated once per Spring IoC container. What is dependency injection IOC in Spring? Answer: The basic concept of the dependency injection also known as Inversion of Control pattern is that you do not create your objects but describe how they should be created. A container in the case of the Spring framework, the IOC container is then responsible for hooking it all up.

That is, dependencies are injected into objects. So, IoC means an inversion of responsibility with regard to how an object obtains references to collaborating objects. What are ways to inject dependency in Spring? Answer: There are two ways to do dependency injection in Spring. Dependency injection via setter method Dependency injection via the constructor. What is spring annotation-based configuration? Answer: You can do dependency injection via annotation also instead of XML configuration.

You can define bean autowiring using annotations. You can use Component, Repository, Service, and Controller annotation to configure bean in the Spring application. Annotations wiring is not turned on by default. You need to turn it on using:. Once you put the above code, you can start using annotation on class, fields or methods. What are different bean scopes in Spring? Answer: There are 5 types of bean scopes supported in spring singleton — Scopes a single bean definition to a single object instance per Spring IoC container.

What do you mean by bean autowiring in Spring? Answer: In the Spring framework, you can wire beans automatically with the auto-wiring feature. The Spring container can autowire relationships between collaborating beans without using and elements which helps cut down on the amount of XML configuration. Describe DispatcherServlet? It handles all the HTTP requests and responses. The DispatcherServlet receives the entry of handler mapping from the configuration file and forwards the request to the controller.

The controller then returns an object of Model And View. The DispatcherServlet checks the entry of view resolver in the configuration file and calls the specified view component.

Answer: Simply put, all the requests processed by the DispatcherServlet are directed to classes annotated with Controller. Each controller class maps one or more requests to methods that process and execute the requests with provided inputs.

If you need to take a step back, we recommend having a look at the concept of the Front Controller in the typical Spring MVC architecture. How does the RequestMapping annotation work? What is the Application Context and what are its functions?

Answer: ApplicationContext is a central interface for providing configuration information to an application. An ApplicationContext provides the following functionalities:. Bean factory methods, inherited from ListableBeanFactory. This avoids the need for applications to use singletons. The ability to resolve messages, supporting internationalization. Inherited from the MessageSource interface.

Hibernate Interview Questions

Hibernate interview questions are asked to the students because it is a widely used ORM tool. The important list of top 20 hibernate interview questions and answers for freshers and professionals are given below. Hibernate is an open-source and lightweight ORM tool that is used to store, manipulate, and retrieve data from the database. It is a programming strategy to map object with the data stored in the database. It simplifies data creation, data manipulation, and data access.

Hibernate is one of the most widely used ORM tool for Java applications. So I decided to write a post about hibernate interview questions to brush up your knowledge before the interview. Whether you are fresher or experienced, having good knowledge or Hibernate ORM tool helps in cracking interview. Here I am providing important hibernate interview questions with answers to help you brush up your knowledge and impress your interviewer. Just like other interview questions posts, chances are that I will be adding more questions to this list in future, so you might want to bookmark it for future reference. Recently I have written a lot of posts on hibernate, most of them contains complete downloadable projects. I will provide reference to them as and when needed and you can go through them to refresh your knowledge.

What is Spring? Answer: Spring is an open source development framework for Enterprise Java. The core features of the Spring Framework can be used in developing any Java application, but there are extensions for building web applications on top of the Java EE platform. Spring framework targets to make Java EE development easier to use and promote good programming practice by enabling a POJO-based programming model. What do you mean by Aspect? Answer: Aspect is modularization of concern which cuts across multiple objects. Transaction management is a good example of a crosscutting concern in J2EE applications.

The JDBC abstraction layer of the Spring offers a meaningful exception hierarchy​, which simplifies the error handling strategy. Integration with Hibernate, JDO, and.

Java Spring Interview Questions

Spring is largely a redundancy. Java EE 6 provides what you are likely to need from Spring a standards compliant framework. If you are still doing J2EE development I can understand why you think Spring is the better framework, however. Thanks Thomas you like these spring questions, and thanks for explaining that point some how I completely missed that. Can you add some more Spring framework interview questions , especially from spring mvc part.

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Thank you for sharing these questions.

Hibernate Interview Questions and Answers

Name some of the design patterns used in Spring Framework? Spring Framework is using a lot of design patterns, some of the common ones are: Singleton Pattern: Creating beans with default scope. What is Spring DAO? How to integrate Spring and Hibernate Frameworks?

It is the execution of an aspect. Advice is like making your application learn a new trick. They are usually introduced at joinpoints. The default scope of bean is Singleton for Spring framework. Transaction management supported by Spring are : Declarative transaction management.

Spring Interview Questions And Answers For Experienced Pdf

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There are a lot of opportunities from many reputed companies in the world. So, You still have an opportunity to move ahead in your career in the Spring certification guide. Do you want to build your career in java spring? Then visit Mindmajix- a global online platform: " Java spring online Training" This course will help you to achieve excellence in this domain. Here are frequently asked java spring interview questions, let's have a look into them.

Сьюзан сочла его план безукоризненным. Вот он - истинный Стратмор. Он задумал способствовать распространению алгоритма, который АНБ с легкостью взломает. - Полный и всеобщий доступ, - объяснял Стратмор.  - Цифровая крепость сразу же станет всеобщим стандартом шифрования. - Сразу же? - усомнилась Сьюзан.  - Каким образом.

 - Он покачал головой, словно не веря такую удачу.  - Чертовское везение, если говорить честно.  - Он, казалось, все еще продолжал сомневаться в том, что Хейл оказался вовлечен в планы Танкадо.  - Я полагаю, Хейл держит этот пароль, глубоко запрятав его в компьютере, а дома, возможно, хранит копию. Так или иначе, он попал в западню. - Тогда почему бы не вызвать службу безопасности, которая могла бы его задержать. - Пока рано, - сказал Стратмор.


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