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What is the need of super.init(config) in servlets?
jameel.nice
- Sep 3rd, 2007
when i m providing init method in our servlet something like that public void init() throws Exception(){//do something}then webcontainer search for the init method to call n it find this in our servle...
Amit Saini
- Dec 15th, 2006
As we know, we override the init() method1Genericservlet have init() method without argument 2 servlet Interface have init() method with argumentInit(ServletConfig object)& we know super is use the in...
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What is the importance of deployment descriptor in servlet?
Amit Saini
- Dec 15th, 2006
Deployment descriptor is use to configure the web application ,its provide the servlet mapping to the URL?mailnly it?s a web.xml file ?.rightAmit saini
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How can a servlet automatically updated by its data without refreshing?take one example of one sensex site. the corresponding data are shown in a scrolling manner. how they can automatically be refreshed after some time. without refreshing the page.
sivaraj.dak
- May 26th, 2008
<% response.setHeader("refresh","6;URL=http://google.com");%> 6-> after amount seconds the page refresh
angelina
- Apr 11th, 2007
we can also use either of following in <head> tag of html/jsp.<META HTTP-EQUIV="PRAGMA" CONTENT="NO-CACHE"> or <% response.setHeader("Cache-Con...
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Consider a scenario in which 4 users are accessing a servlet instance. Among which one user called destroy() method. What happens to the rest 3 users?
Janga Yella Raju
- May 25th, 2013
Calling destroy method by himself. Doesnt means destroying the servlet. Container will take care to destroy the servlet when application undeployed or system shut downs. So, if 1 user calls destroy m...
sampra
- Mar 4th, 2008
If there are 4 user and one has distroy the thred then thread which he is using only that will be distroy rest will be keep alive
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What is dynamic content?In real time example?
dhruv_saksena
- Mar 14th, 2008
See by dynamic content we mean the content which is decided at runtime.Depending on the request which a user is sending we get a respose which is dependent on the request and it is not fixed.For examp...
sunil.yadav
- Jan 31st, 2007
very simple if you ask me my profile or someone else ask my profile, i will answer in two seperate reply considering the consiquency, as per request reponse content is different, and thats the dynamic...
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Why SingleThread model is deprecated in Servlets?
mrkrishankumar
- Aug 29th, 2008
The use of the SingleThreadModel interface guarantees that only one thread at a time will execute in a given servlet instances service method. It is important to note that this guarantee only appli...
sampra
- Mar 6th, 2008
Single thread model is depricated beacuse it is really very expensive to creating ins instance for each request is time consuming and difficult
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Session and Cookie
What is the different between session and cookies? Where is the session information stored? In RAM of the Client or Disk of the Client or it is stored on the server?
vinaymudgil007
- Aug 30th, 2009
well, the purpose of session and cookie is the same --- to maintain the state [in a typical web application, based on http protocol]Session -- Its stored at server side [containers memory, R...
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Why is that we deploy servlets in a webserver.What exactly is a webserver?
bharathwatch
- Jul 9th, 2011
Webserver is a piece of s/w that takes the request from client(browser) and passes that request to appropriate web resource program and it provides services to application(creating obj,call the method...
pavan kumar
- May 8th, 2007
A Web server handles the HTTP protocol. When the Web server receives an HTTP request, it responds with an HTTP response, such as sending back an HTML page. To process a request, a Web server may respo...
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What is difference between HttpServlet and GenericServlet. and when to use and why. what is the importance of each.
aishwarya.srivastava
- Jun 26th, 2009
HttpServlet class is extended from GenericServlet, which in turn implements the Servlet interface. When you are developing your own servlets, you will likely extends one of these two classes.When exte...
A.Naresh Kumar Reddy
- Jan 6th, 2007
HttpServlet Provides an abstract class to besubclassed to create an HTTP servlet suitable for a Web site. A subclass of HttpServletmust override at least one method, usually one of these:doGet, if th...
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What is the difference between servlets and applets?
Servlets are to servers. Applets are to browsers. Unlike applets, however, servlets have no graphical user interface.
shubhra
- Oct 1st, 2011
Applet have no main method. It executes in browser
but servlet is a server side program it executes in application server.jimmy514in
- Jul 3rd, 2010
But Servlet is a Server Side Component. It is a Controller in the MVC architecture, It is used to perform business logic and does not deal with the visual implementation. The visual part is done by us...
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What is servlet ,what is the use of it?
Rajkumar
- Feb 10th, 2007
Hi,Servlet is a webcomponent which is used for the generating dyanamic content.Because most of the web applications are dynamic in nature .In order to generate the dyanmic content we are using the servlets.
sudhakarchowdary
- Jan 12th, 2007
A servlet is a class that is used to extend the capabilities of servers that host applications access via a request-response programming model. Although servlets can respond to any type of request, th...
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While using cookies, when the browser is shut down. will the data be available at next open of browser. If not available, how to over come that.
pdommara
- Sep 16th, 2010
Hi guys, Thanks for your answers, but no one could not able to answer exactily. Here my try is : We can use cookies to store the permenentily at browser by setting cookie.setmaxAge(0...
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If we put some request, intially either doget() or dopost() is getting invoked? why not any servlet life cycle method is not getting invoked?Then why don't we include this doget() and dopost() in the servlet life cycle methods?
sampra
- Mar 6th, 2008
If I understand your question, doPost/doGet is part of servlet's life-cycle only but is implied. Meaning, service() method plays the actual role of calling respective request methods (doGet/doPost...
sampra
- Mar 4th, 2008
If I understand your question, doPost/doGet is part of servlet's life-cycle only but is implied. Meaning, service() method plays the actual role of calling respective request methods (doGet/doPost...
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Servlets Interview Questions
Ans