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How many Request, Response & session instance you can create for N number of uesr request from a. user request from same userb. user request from diffrent user
Praveen.kb
- Sep 4th, 2009
1 session for 1 user.Multiple request-response objects for multiple request for 1 user.
myogeshchavan97
- Jul 26th, 2009
For each new request one request instance and one response instance is created and for each servlet only one session instance is created.
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What is the need for having HTTPServlet class when we already have GenericServlet class which can handle all type of requests?
satin40
- Apr 20th, 2009
Http servlets is the sub class of Generic servlet so all the life cycle methods available in the generic servlets are available to the Http servlets. Http servlets provides methods that supports cooki...
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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 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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What is the Servlet Interface?
The central abstraction in the Servlet API is the Servlet interface. All servlets implement this interface, either directly or, more commonly, by extending a class that implements it such as HttpServlet.Servlets-->Generic Servlet-->HttpServlet-->MyServlet.The Servlet interface declares, but does not implement, methods that manage the servlet and its communications with clients. Servlet writers...
senthil_2009
- Sep 3rd, 2009
The central abstraction in the Servlet API is the Servlet interface. All servlets implement this interface, either directly or, more
trinadhd
- Jul 7th, 2009
It is nothing but an interface which contains set of method names (prototypes).Those are called servlet life cycle methods.init(ServletConfig)getServletConfig()service(SeveletRequest , ServletResponce...
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Can a init(ServletConfig config) method be overrided in servlets?
vperi
- Mar 19th, 2009
Yes. We can override.The init(ServletConfig) method is defined in the Servlet interface. It has been implemented by the GenericServlet class. The implementation of this init method in the GenericS...
Bhupender Giri
- Nov 9th, 2005
The init() method of servlet can be overridden. Remember the init() method is overloaded in the GenericServlet class. But the difference lies in which init method are u calling..if you override the in...
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What are the JSP atrributes?
sivachandran55
- Feb 25th, 2008
Actually, jsp must have a attributes, and its can be setted as well as getted. Ex, session.setattribute (" &qu...
manas_mony
- Feb 6th, 2008
I think there is no JSP attributes.But the question should be like this.........What is the attribute of page directive or include directive or ...etc.
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Suppose in web.xml file we are given 30 and in the servlet program we are given setSessionInActiveInterval(40).when that session will be terminated ? After 30 sec or 40 sec?
yogesh249
- Jun 30th, 2010
Session.setMaxInactiveInterval(20*60) Only the session on which you call the method is affected.But if you configure in DD (i.e. web.xml) it changes all the sessions of the web-application.
yogesh249
- Jun 30th, 2010
setMaxInactiveInterval specifies the maximum time, in seconds, that you want to allow between client requests for this session.When configuring in web.xml<web-app>...<session-config> ...
Servlets Interview Questions
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