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| Java EE - Interview Questions and Answers for 'Web application' - 25 question(s) found - Order By Newest | |||||
 Recently asked in TCS , Tech Mahindra, HCL , Accenture and Fidelity. | |||||
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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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 Discuss Correct / Improve  j2ee spring mvc frameworks web applications architecture  Asked in 10 Companies  Basic  frequent | |||||
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| Ans. Session tracking is a mechanism that servlets use to maintain state about a series requests from the same user across some period of time. The methods used for session tracking are: User Authentication - occurs when a web server restricts access to some of its resources to only those clients that log in using a recognized username and password Hidden form fields - fields are added to an HTML form that are not displayed in the client's browser. When the form containing the fields is submitted, the fields are sent back to the server URL rewriting - every URL that the user clicks on is dynamically modified or rewritten to include extra information. The extra information can be in the form of extra path information, added parameters or some custom, server-specific URL change. Cookies - a bit of information that is sent by a web server to a browser and which can later be read back from that browser. HttpSession- places a limit on the number of sessions that can exist in memory. | |||||
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| Discuss Correct / Improve j2ee servlets session session management web applications cookies httpsession url rewriting architecture Asked in 1 Companies | |||||
| Very frequently asked.Usually among first few questions. | |||||
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| 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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| Discuss Correct / Improve j2ee mvc mvc design pattern design pattern struts spring web application web frameworks ebay Asked in 60 Companies basic frequent | |||||
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| Ans. An asynchronous event is one that occurs at an unpredictable time outside the control of the program that the CPU is running. It is not "synchronized" with the program. | |||||
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| Discuss Correct / Improve j2ee internet web application asynchronus asynchronus communication architecture Asked in 1 Companies | |||||
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| Ans. Yes by making entries in web.xml | |||||
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| Discuss Correct / Improve j2ee servlets servelets web application java web.xml yes-no architecture | |||||
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| Ans. Within message.properties file. | |||||
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| Discuss Correct / Improve j2ee web application struts spring Asked in 1 Companies | |||||
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| Ans. The Spring Framework supports following five scopes - Singleton prototype request session global-session | |||||
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| Discuss Correct / Improve j2ee spring mvc frameworks web applications beans beans scope at&t fidelity | |||||
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| Ans. Session cookies , which are deleted once the session is over. Permanent cookies , which stays at client PC even if the session is disconnected. | |||||
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| Discuss Correct / Improve j2ee servlets session session management web applications cookies httpsession | |||||
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| Ans. WEB APP |WEB-INF - META-INF | | | META-INF.MF | lib - WEB.xml - Classes | |||||
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| Discuss Correct / Improve web application Asked in 3 Companies intermediate frequent | |||||
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| 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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| Discuss Correct / Improve cookie javascript web application session management browser j2ee Asked in 16 Companies basic frequent | |||||
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| Ans. Multiple servlets serving the request in chain. | |||||
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| Discuss Correct / Improve java web application servlets Asked in 1 Companies rare | |||||
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| Ans. Cookie and Session are used to store the user information. Cookie stores user information on client side and Session does it on server side. Primarily, Cookies and Session are used for authentication, user preferences, and carrying information across multiple requests. Session is meant for the same purpose as the cookie does. Session does it on server side and Cookie does it on client side. One more thing that quite differentiates between Cookie and Session. Cookie is used only for storing the textual information. Session can be used to store both textual information and objects. | |||||
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| Discuss Correct / Improve session session management java cookies authentication web application ebay intermediate | |||||
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| Ans. There are seven core modules in spring Spring MVC The Core container O/R mapping DAO Application context Aspect Oriented Programming or AOP Web module | |||||
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| Discuss Correct / Improve j2ee spring mvc frameworks web applications | |||||
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| 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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| Discuss Correct / Improve j2ee spring mvc frameworks web applications spring configuration file Asked in 1 Companies | |||||
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| Ans. The default scope of bean is Singleton. | |||||
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| Discuss Correct / Improve j2ee spring mvc frameworks web applications bean | |||||
| Very Frequently asked Spring question. | |||||
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| 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 | |||||
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| Discuss Correct / Improve j2ee spring mvc frameworks web applications autowiring beans at&t ge Asked in 9 Companies frequent | |||||
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| 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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| Discuss Correct / Improve j2ee servlets servelets web application jsp jsp life cycle mindtree Asked in 9 Companies | |||||
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| Ans. The jsp scriptlet tag can only declare variables not methods whereas jsp declaration tag can declare variables as well as methods. The declaration of scriptlet tag is placed inside the _jspService() method whereas The declaration of jsp declaration tag is placed outside the _jspService() method. | |||||
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| Discuss Correct / Improve j2ee jsp scriptlet tag declaraation tag web application | |||||
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| 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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| Discuss Correct / Improve j2ee servlets servelets web application jsp jsp ldirectives | |||||
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| 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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| Discuss Correct / Improve j2ee servlets web application session httpsession architecture Asked in 1 Companies | |||||
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| 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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| Discuss Correct / Improve j2ee servlets session session management web applications cookies httpsession architecture | |||||
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| Ans. stateless | |||||
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| Discuss Correct / Improve j2ee servlets session session management web applications cookies httpsession architecture | |||||
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| Ans. Yes , sometime we receive issues related to outdated pages being rendered to the user. In those cases we clear the cache and then try to investigate the reason for that. Sometime the issue is due to comparatively high refresh interval. In those cases we reduce the cache refresh interval. | |||||
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| Discuss Correct / Improve caching cache java web applications production support application support | |||||
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| This question was recently asked at 'Symantec'.This question is still unanswered. Can you please provide an answer. | |||||
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| Discuss Correct / Improve web application url Asked in 1 Companies rare | |||||
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| Ans. The load-on-startup element of web-app loads the servlet at the time of deployment or server start if value is positive. It is also known as pre initialization of servlet.You can pass positive and negative value for the servlet. | |||||
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| Discuss Correct / Improve load on startup web application Asked in 1 Companies | |||||
Which of following class types in MVC holds Business logic ?
