Java ee - Interview Questions and Answers for 'Wipro' | Search Interview Question

Java ee - Interview Questions and Answers for 'Wipro' - 4 question(s) found - Order By Newest

Frequently asked. Among first few questions in the J2EE segment of interview.

Q1. What is deployment descriptor ?

or

What is the use of deployment descriptor ?

Ans. Deployment Descriptor which is usually web.xml is used to specify the classes, resources and configuration of the application and how the web server uses them to serve web requests.This file is usually added to WEB-INF folder and contains following

* Servlet entries and url mapping
* Plugins
* Some info regarding authentication / filters
* Landing Page
* Event Handlers

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Q2. Difference between jar , war and ear ?

Java EE

Ans. Jar is Java Archieve i.e compressed Class or Class / Java files.

War comprises of compressed Servlet class files,JSP FIles,supporting files, GIF and HTML files.

Ear comprise of compressed Java and web module files ( was files ).

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_{Like Discuss Correct / Improve java j2ee jar web development war ear build management release management Asked in 12 Companies basic frequent}

Q3. What is a cookie ?

Java EE

Ans. A cookie is a small piece of text stored on a user's computer by the browser for a specific domain. Commonly used for authentication, storing site preferences, and server session identification.

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Q4. What does the web status code 404,500 and 200 mean ?

Java EE

Ans. 404 means the resource is not found on the server.The resource might not be deployed correctly.

500 means internal server error which means that resource was located but then it resulted in some exception or error.

200 means Ok.

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