A web browser need NOT always perform a complete request for a particular page that it suspects mightNOT have changed. The HTTP specification provides a mechanism for the browser to retrieve only a partialresponse from the web server； this response includes information， such as the Last-Modified date but NOTthe body of the page.
Which HTTP method will the browser use to retrieve such a partial response？（）
A.GET
B.ASK
C.SEND
D.HEAD
E.TRACE
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Your IT department is building a lightweight Front Controller servlet that invokes an application logic objectwith the interface：
public interface ApplicationController {public String invoke（HttpServletRequest request）}
The return value of this method indicates a symbolic name of the next view. From this name， the FrontController servlet looks up the JSP URL in a configuration table. This URL might be an absolute path or apath relative to the current request. Next， the Front Controller servlet must send the request to this JSP togenerate the view. Assume that the servlet variable request is assigned the current HttpServletRequestobject and the variable context is assigned the webapp’s ServletContext.
Which code snippet of the FrontController servlet accomplishes this goal？（）
A.Dispatcher view=context.getDispatcher（viewURL）；view.forward Request（request， response）；
B.Dispatcher view=request.getDispatcher（viewURL）；view.forward Request（request， response）；
C.RequestDispatcher view. =context.getRequestDispatcher（viewURL）；view.forward（request，response）；
D.RequestDispatcher view=request.getRequestDispatcher（viewURL）；view.forward（request， response）；
A.The init method on a filter is called the first time a servlet mapped to that filter is invoked.
B.A filter defined for a servlet must always forward control to the next resource in the filter chain.
C.Filters associated with a named servlet are applied in the order they appear in the web application deployment descriptor file.
D.If the init method on a filter throws an UnavailableException， then the container will make no further attempt to execute it.
A.A filter must implement the destroy method.
B.A filter must implement the doFilter method.
C.A servlet may have multiple filters associated with it.
D.A servlet that is to have a filter applied to it must implement the javax.servlet.FilterChain interface.
E.A filter that is part of a filter chain passes control to the next filter in the chain by invoking the FilterChain.forward method.
All of your JSPs need to have a link that permits users to email the web master. This web application islicensed to many small businesses， each of which have a different email address for the web master. Youhave decided to use a context parameter that you specify in the deployment descriptor， like this：
42.<context-param>
43.<param-name>webmasterEmail</param-name>
44.<param-value>master@example.com</param-value>
45.</context-param>
Which JSP code snippet creates this email link？（）
A.<a href=’mailto：${contextParam.webmasterEmail}’>contact us</a>
B.<a href=’mailto：${applicationScope.webmasterEmail}’>contact us</a>
C.<a href=’mailto：${contextInitParam.webmasterEmail}’>contact us</a>
D.<a href=’mailto：${initParam.webmasterEmail}’>contact us</a>
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Your IT department is building a lightweight Front Controller servlet that invokes an application logic objectwith the interface：public interface ApplicationController {public String invoke（HttpServletRequest request）}The return value of this method indicates a symbolic name of the next view. From this name， the FrontController servlet looks up the JSP URL in a configuration table. This URL might be an absolute path or apath relative to the current request. Next， the Front Controller servlet must send the request to this JSP togenerate the view. Assume that the servlet variable request is assigned the current HttpServletRequestobject and the variable context is assigned the webapp’s ServletContext.Which code snippet of the FrontController servlet accomplishes this goal？（）
Click the Exhibit button.The attribute "name" has a value of "Foo，"What is the result if this tag handler’s tag is invoked？（）
Click the ’Select and Place’ button.Place the events in the order they occur.
Which element of a web application deployment descriptor element is required？（）
A web application allows the HTML title banner to be set using a servlet context initialization parametercalled titleStr.Which two properly set the title in this scenario？（）
Which ensures that a JSP response is of type "text/plain"？（）
Click the ’Select and Place’ button.Place the events in the order they occur.
You are building a dating web site. The client’s date of birth is collected along with lots of other information.The Person class has a derived method， getAge（）：int， which returns the person’s age calculated from thedate of birth and today’s date. In one of your JSPs you need to print a special message to clients within theage group of 25 through 35.Which two EL code snippets will return true for this condition？ （）
Your IT department is building a lightweight Front Controller servlet that invokes an application logic objectwith the interface：public interface ApplicationController {public String invoke（HttpServletRequest request）}The return value of this method indicates a symbolic name of the next view. From this name， the FrontController servlet looks up the JSP URL in a configuration table. This URL might be an absolute path or apath relative to the current request. Next， the Front Controller servlet must send the request to this JSP togenerate the view. Assume that the servlet variable request is assigned the current HttpServletRequestobject and the variable context is assigned the webapp’s ServletContext. Which code snippet of the FrontController servlet accomplishes this goal？（）
Click the ’Select and Place’ button.Place the events in the order they occur.