A developer has created a web application that includes a servlet for each use case in the application.These servlets have become rather difficult to maintain because the request processing methods havebecome very large. There is also common processing code in many servlets because these use cases arevery similar.
Which two design patterns can be used together to refactor and simplify this web application？（）
A.Proxy
B.View Helper
C.Front Controller
D.Session Facade
E.Business Delegate
F.Model-View-Controller
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You need to store a floating point number，called Tsquare，in the session scope.
Which two code snippetsallow you to retrieve this value？（）
A.float Tsquare = session.getFloatAttribute（"Tsquare"）；
B.float Tsquare = （Float） session.getAttribute（"Tsquare"）；
C.float Tsquare = （float） session.getNumericAttribute（"Tsquare"）；
D.float Tsquare = （（Float） session.getAttribute.（"Tsquare"））.floatValue（）；
E.float Tsquare = （（Float） session.getFloatAttribute.（"Tsquare"））.floatValue；
Given an HttpServletRequest request：
22.String id = request.getParameter（"jsessionid"）；
23.// insert code here
24.String name = （String） session.getAttribute（"name"）；
Which three can be placed at line 23 to retrieve anexisting HttpSession object？（）
A.HttpSession session = request.getSession（）；
B.HttpSession session = request.getSession（id）；
C.HttpSession session = request.getSession（true）；
D.HttpSession session = request.getSession（false）；
E.HttpSession session = request.getSession（"jsessionid"）；
201.private static final Set USE_CASE_ATTRS；
202.static {
203.USE_CASE_ATTRS.add（"customerOID"）；
204.USE_CASE_ATTRS.add（"custMgrBean"）；
205.USE_CASE_ATTRS.add（"orderOID"）；
206.USE_CASE_ATTRS.add（"orderMgrBean"）；
207.}
Which code snippet deletes these attributes from the session object？（）
A.session.removeAll（USE_CASE_ATTRS）；
B.for （ String attr ： USE_CASE_ATTRS ） {session.remove（attr）；}
C.for （ String attr ： USE_CASE_ATTRS ） {session.removeAttribute（attr）；}
D.for （ String attr ： USE_CASE_ATTRS ） {session.deleteAttribute（attr）；}
E.session.deleteAllAttributes（USE_CASE_ATTRS）；
Given a portion of a valid Java EE web application’s directory structure：MyApp |
|--Directory1
||--File1.html|
|--META-INF|
|--File2.html|
|--WEB-INF
|--File3.html
You want to know whether File1.html， File2.html，and/or File3.html is protected from direct access by yourweb client’s browsers.
What statement is true？（）
A.All three files are directly accessible.
B.Only File1.html is directly accessible.
C.Only File2.html is directly accessible.
D.Only File3.html is directly accessible.
最新試題
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.
Click the 'Select and Place' button.Place the events in the order they occur.
You are building your own layout mechanism by including dynamic content for the page’s header and footersections. The footer is always static， but the header generates the <title> tag that requires the page name tobe specified dynamically when the header is imported.Which JSP code snippet performs the import of theheader content？（）
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？ （）
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？（）
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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 ’Select and Place’ button.Place the events in the order they occur.
Which two are valid and equivalent？（）