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
您可能感興趣的試卷
你可能感興趣的試題
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>
最新試題
In which three directories， relative to a web application’s root， may a tag library descriptor file reside whendeployed directly into a web application？（）
Given tutorial.jsp：2.EL Tutorial3.Example 14.5.Dear ${my：nickname（user）}6.Which， when added to the web application deployment descriptor，ensures that line 5 is included verbatimin the JSP output？（）
Click the ’Select and Place’ button.Place the events in the order they occur.
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？ （）
Click the ’Select and Place’ button.Place the events in the order they occur.
You need to create a JSP that generates some JavaScript code to populate an array of strings used on the client-side.Which JSP code snippet will create this array？（）
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.
Click the 'Select and Place' button.Place the events in the order they occur.