Java EE - Interview Questions and Answers for 'J2ee' | Search Interview Question

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Q31. What is Spring configuration file?

Ans. Spring configuration file is an XML file. This file contains the classes information and describes how these classes are configured and introduced to each other.

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Q32. Q: What is default scope of bean in Spring framework?

Spring

Ans. The default scope of bean is Singleton.

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Very Frequently asked Spring question.

Q33. What is bean auto wiring?

Spring

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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Q34. What are the phases of the JSP life cycle ?

Java EE

Ans. Translation of JSP PageCompilation of JSP PageClassloading (class file is loaded by the classloader)Instantiation (Object of the Generated Servlet is created).Initialization ( jspInit() method is invoked by the container).Reqeust processing ( _jspService() method is invoked by the container).Destroy ( jspDestroy() method is invoked by the container).

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Q35. What are JSP directives ? What are different types of directives ?

Java EE

Ans. The jsp directives are messages that tells the web container how to translate a JSP page into the corresponding servlet.

There are three types of directives -

page directive
include directive
taglib directive

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Q36. Which markup languages can be used in restful web services ?

Rest

Ans. XML and JSON ( Javascript Object Notation ).

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Q37. What are advantages of using Servlets over CGI ?

Java EE

Ans. Better Performance as Servlets doesn't require a separate process for a single request.

Servlets are platform independent as they are written in Java.

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Q38. What is the use of HTTPSession in relation to http protocol ?

Java EE

Ans. http protocol on its own is stateless. So it helps in identifying the relationship between multiple stateless request as they come from a single source.

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Q39. Why using cookie to store session info is a better idea than just using session info in the request ?

Java EE

Ans. Session info in the request can be intercepted and hence a vulnerability. Cookie can be read and write by respective domain only and make sure that right session information is being passed by the client.

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Q40. http protocol is by default ... ?

Java EE

Ans. stateless

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Q41. Action Class is singleton and hence not thread safe in ..

a. All versions of Struts
b. Struts 1
c. Struts 2
d. None of Struts versions

Ans. Struts 1

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Q42. Are Servlet classes Thread Safe ?

Java EE

Ans. No

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Q43. What are the different J2EE modules ?

Java EE

Ans. 1. Application Client Module
2. Web Module
3. EJB
4. Resource Adapter

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Q44. What does the Web module contains ?

Java EE

Ans. JSP files, media files and deployment descriptor ( web.xml )

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Q45. What is the difference between Java and J2ee ?

Java EE

^{This question was recently asked at 'Sunovaa Tech'.This question is still unanswered. Can you please provide an answer.}

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Q46. What is difference between url based and component based web application ?

J2EE

^{This question was recently asked at 'Newgen technologies'.This question is still unanswered. Can you please provide an answer.}

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