Spring - Interview Questions and Answers for 'Hcl' | Search Java Interview Question

Spring - Interview Questions and Answers for 'Hcl' - 5 question(s) found - Order By Newest

Recently asked in Accenture and Fidelity.

Q1. Explain Flow of Spring MVC ?

Spring

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Ans. The DispatcherServlet configured in web.xml file receives the request.

The DispatcherServlet finds the appropriate Controller with the help of HandlerMapping and then invokes associated Controller.

Then the Controller executes the logic business logic and then returns ModeAndView object to the DispatcherServlet.

The DispatcherServlet determines the view from the ModelAndView object.

Then the DispatcherServlet passes the model object to the View.

The View is rendered and the Dispatcher Servlet sends the output to the Servlet container.

Finally Servlet Container sends the result back to the user.

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_{Like Discuss Correct / Improve j2ee spring mvc frameworks web applications architecture Accenture fidelity IBM India Softtek Tata Consultancy (TCS) HCL Technologies Pragiti Internet Technologies Basic frequent}

Very frequently asked.Usually among first few questions.

Q2. What is MVC ?

Design

^Anonymous

Ans. MVC is a Design Pattern that facilititates loose coupling by segregating responsibilities in a Web application

1. Controller receives the requests and handles overall control of the request
2. Model holds majority of the Business logic, and
3. View comprise of the view objects and GUI component

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Very Frequently asked Spring question.

Q3. What is bean auto wiring?

Spring

^{Admin
info@buggybread.com}

Ans. The Spring container is able to autowire relationships between collaborating beans. This means that it is possible to automatically let Spring resolve collaborators (other beans) for your bean by inspecting the contents of the BeanFactory without using and elements.

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Q4. Difference between constructor and setter injection ?

Spring

^{2017-06-23 11:49:27}

Ans. 1. In Setter Injection, partial injection of dependencies can possible, means if we have 3 dependencies like int, string, long, then its not necessary to inject all values if we use setter injection. If you are not inject it will takes default values for those primitives1. In constructor injection, partial injection of dependencies cannot possible, because for calling constructor we must pass all the arguments right, if not so we may get error

2. Setter Injection will overrides the constructor injection value, provided if we write setter and constructor injection for the same property [i already told regarding this, hope you remember ] But, constructor injection cannot overrides the setter injected values

3. If we have more dependencies for example 15 to 20 are there in our bean class then, in this case setter injection is not recommended as we need to write almost 20 setters right, bean length will increase. In this case, Constructor injection is highly recommended, as we can inject all the dependencies with in 3 to 4 lines [i mean, by calling one constructor]

4. Setter injection makes bean class object as mutable [We can change ] .Constructor injection makes bean class object as immutable [We cannot change ]

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Q5. What is setter injection ?

Spring

^{2018-06-16 08:00:08}

Ans. Setter Injection in Spring is a type of dependency injection in which the framework injects the dependent objects into the client using a setter method.

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