ALLInterview.com :: Home Page            
 Advertise your Business Here     
Browse  |   Placement Papers  |   Company  |   Code Snippets  |   Certifications  |   Visa Questions
Post Question  |   Post Answer  |   My Panel  |   Search  |   Articles  |   Topics  |   ERRORS new
   Refer this Site  Refer This Site to Your Friends  Site Map  Bookmark this Site  Set it as your HomePage  Contact Us     Login  |  Sign Up                      
Google
   
 
Categories >> Software >> Java Related >> Java J2EE >> Struts
 
 


 

 
 Core Java interview questions  Core Java Interview Questions (1721)
 Advanced Java interview questions  Advanced Java Interview Questions (331)
 Swing interview questions  Swing Interview Questions (44)
 EJB interview questions  EJB Interview Questions (134)
 Servlets interview questions  Servlets Interview Questions (255)
 Struts interview questions  Struts Interview Questions (196)
 JDBC interview questions  JDBC Interview Questions (187)
 JMS interview questions  JMS Interview Questions (9)
 SunOne interview questions  SunOne Interview Questions (3)
 J2EE interview questions  J2EE Interview Questions (71)
 Weblogic interview questions  Weblogic Interview Questions (146)
 Websphere interview questions  Websphere Interview Questions (14)
 Java Networking interview questions  Java Networking Interview Questions (20)
 Java J2EE AllOther interview questions  Java J2EE AllOther Interview Questions (87)
Question
1.when actionservelet execute.
2.when web.xml executes
 Question Submitted By :: Struts
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
--------
1)The "web.xml" comes into the the picture when the
respective server is started. When the time of server is
starting the container will check the syntax and parse
the "web.xml" file.
2)The "web.xml" file is called as a deployment descripta
because it tells the server just what the application
contains that's it beyond of that it's doesn't do any thing.

ActionServlet:
--------------
1)ActionServlet is a predefined Servlet class which comes
along with struts framework.
2)When we implemented a struts based web application then
every request and response must go through the controller
(ActionServlet).
3)We can define our own ActionServlet class insted of using
the predefined ActionServlt class but in most of all cases
we will use only the predefined ActionServlet class.
4)We should configure the ActionServlet class in
the "web.xml" file like as followed

Example:
--------
<web-app>
<servlet>
<servlet-name>as</servlet-name>
<servlet-
class>org.apache.struts.action.ActionServlet</servlet-class>

<load-on-startup>1</load-on-startup>

<init-param>
<param-name>config</param-name>
<param-value>/WEB-INF/struts-
config.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>as</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
</web-app>

5)If we specified "<load-on-startup>" then
the "ActionServlet" class will load,instantiated and
initilized when the server or application started.
6)If we didn't specify "<load-on-startup>" then
the "ActionServlet" class will load,instantiated and
initialized when the first request comes.
 
Is This Answer Correct ?    21 Yes 0 No
Shaik Baji
 
Answer
# 2
at container startup, container reads the web.xml using sax
perser

in web.xml,we are configuring ActionServlet with load on
start up tag ,then ActionServlet will loaded,
<servlet-name>as</servlet-name>
<servlet-
class>org.apache.struts.action.ActionServlet</servlet-class>
<load-on-startup>1</load-on-startup>
 
Is This Answer Correct ?    0 Yes 0 No
Srikanth
 
 
 
Answer
# 3
web.xml will execute during the deployemnt / server start
up as the Action servlet instance been called from web.xml
the call will be secondary where the webxml precedes it
 
Is This Answer Correct ?    0 Yes 4 No
Ravikiran
 

 
 
 
Other Struts Interview Questions
 
  Question Asked @ Answers
 
What is Portlet???? when,where and why we use it ?? Wipro 3
why do we typecast ActionForm into our plain java bean class in Action class? What is the reason?   4
struts comes under which layer of three tire architecture in real time projects plz i need explaination? Infinite-Computer-Solutions 10
How to forward from Array List to Jsp in Struts ActionServlet class?   8
what is the use of cvs in struts?   2
what is the advantages and diadvantages of Struts?   1
Can we write our own ActionServlet for front controller of Struts Applications? NIIT 2
i have list of values(e.g 100). using logic:iterate, how can i print the multiples of 5th element? how the logic:iterate will understand the multiples of 5. CTS 2
can we change the location of struts-config.xml file? TCS 2
Hi frnds iam new to struts wen iam running helloworld application using struts iam getting the error as belwo kindly any one can solve it plzz .....thanks in advance......... Nov 18, 2009 9:27:46 PM org.apache.tomcat.util.digester.SetPropertiesRule begin WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:StrutsExample1' did not find a matching property. Nov 18, 2009 9:27:46 PM org.apache.tomcat.util.digester.SetPropertiesRule begin WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:Struts1' did not find a matching property. Nov 18, 2009 9:27:46 PM org.apache.catalina.core.AprLifecycleListener init INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Program Files\Java\jre6\bin;.;C:\WINDOWS\Sun\Java\bin;C:\WINDOWS\sys tem32;C:\WINDOWS;C:/Program Files/Java/jre6/bin/client;C:/Program Files/Java/jre6/bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOW S\System32\Wbem;C:\Program Files\Java\jdk1.5.0_18\bin; Nov 18, 2009 9:27:46 PM org.apache.coyote.http11.Http11Protocol init INFO: Initializing Coyote HTTP/1.1 on http-8081 Nov 18, 2009 9:27:46 PM org.apache.catalina.startup.Catalina load INFO: Initialization processed in 678 ms Nov 18, 2009 9:27:46 PM org.apache.catalina.core.StandardService start INFO: Starting service Catalina Nov 18, 2009 9:27:46 PM org.apache.catalina.core.StandardEngine start INFO: Starting Servlet Engine: Apache Tomcat/6.0.20 Nov 18, 2009 9:27:46 PM org.apache.catalina.core.ApplicationContext log INFO: Marking servlet action as unavailable Nov 18, 2009 9:27:46 PM org.apache.catalina.core.ApplicationContext log SEVERE: Error loading WebappClassLoader delegate: false repositories: /WEB-INF/classes/ ----------> Parent Classloader: org.apache.catalina.loader.StandardClassLoader@ca2dce org.apache.struts.action.ActionServlet java.lang.ClassNotFoundException: org.apache.struts.action.ActionServlet at org.apache.catalina.loader.WebappClassLoader.loadClass(Webap pClassLoader.java:1387) at org.apache.catalina.loader.WebappClassLoader.loadClass(Webap pClassLoader.java:1233) at org.apache.catalina.core.StandardWrapper.loadServlet(Standar dWrapper.java:1095) at org.apache.catalina.core.StandardWrapper.load(StandardWrappe r.java:993) at org.apache.catalina.core.StandardContext.loadOnStartup(Stand ardContext.java:4149) at org.apache.catalina.core.StandardContext.start(StandardConte xt.java:4458) at org.apache.catalina.core.ContainerBase.start(ContainerBase.j ava:1045) at org.apache.catalina.core.StandardHost.start(StandardHost.jav a:722) at org.apache.catalina.core.ContainerBase.start(ContainerBase.j ava:1045) at org.apache.catalina.core.StandardEngine.start(StandardEngine .java:443) at org.apache.catalina.core.StandardService.start(StandardServi ce.java:516) at org.apache.catalina.core.StandardServer.start(StandardServer .java:710) at org.apache.catalina.startup.Catalina.start(Catalina.java:583 ) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:2 88) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:41 3) Nov 18, 2009 9:27:46 PM org.apache.catalina.core.StandardContext loadOnStartup SEVERE: Servlet /Struts1 threw load() exception java.lang.ClassNotFoundException: org.apache.struts.action.ActionServlet at org.apache.catalina.loader.WebappClassLoader.loadClass(Webap pClassLoader.java:1387) at org.apache.catalina.loader.WebappClassLoader.loadClass(Webap pClassLoader.java:1233) at org.apache.catalina.core.StandardWrapper.loadServlet(Standar dWrapper.java:1095) at org.apache.catalina.core.StandardWrapper.load(StandardWrappe r.java:993) at org.apache.catalina.core.StandardContext.loadOnStartup(Stand ardContext.java:4149) at org.apache.catalina.core.StandardContext.start(StandardConte xt.java:4458) at org.apache.catalina.core.ContainerBase.start(ContainerBase.j ava:1045) at org.apache.catalina.core.StandardHost.start(StandardHost.jav a:722) at org.apache.catalina.core.ContainerBase.start(ContainerBase.j ava:1045) at org.apache.catalina.core.StandardEngine.start(StandardEngine .java:443) at org.apache.catalina.core.StandardService.start(StandardServi ce.java:516) at org.apache.catalina.core.StandardServer.start(StandardServer .java:710) at org.apache.catalina.startup.Catalina.start(Catalina.java:583 ) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:2 88) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:41 3) Nov 18, 2009 9:27:46 PM org.apache.coyote.http11.Http11Protocol start INFO: Starting Coyote HTTP/1.1 on http-8081 Nov 18, 2009 9:27:46 PM org.apache.jk.common.ChannelSocket init INFO: JK: ajp13 listening on /0.0.0.0:8009 Nov 18, 2009 9:27:46 PM org.apache.jk.server.JkMain start INFO: Jk running ID=0 time=0/31 config=null Nov 18, 2009 9:27:46 PM org.apache.catalina.startup.Catalina start INFO: Server startup in 616 ms   2
what is the purpose of load_on_startup entry in struts- config.xml? Satyam 8
i have 500 jsps in my application,and i have same forward name for each jsp,so it lokks in strutsconfig.xml,from 1 to 500,but i want send 498 page directly,how can i cingigure my application TCS 2
 
For more Struts Interview Questions Click Here 
 
 
 
 
 


   
Copyright Policy  |  Terms of Service  |  Articles  |  Site Map  |  RSS Site Map  |  Contact Us
   
Copyright 2013  ALLInterview.com.  All Rights Reserved.

ALLInterview.com   ::  KalAajKal.com