问题:单选题Which option prevents the exception thrown by my:errorProne from invoking the error page mechanism and outputs the message "File not found" in the response?()AABBCCDDEE
查看答案
问题:单选题} What is the result?()ACompilation succeeds and 1 is printed.BCompilation succeeds and 2 is printed.CAn error at line 8 causes compilation to fail.DAn error at line 14 causes compilation to fail.
问题:单选题Which interface must a class implement to be informed of a session creation event?()Ajavax.servlet.http.HttpSessionListenerBjavax.servlet.http.HttpSessionBindingListenerCjavax.servlet.http.HttpSessionCreationListenerDjavax.servlet.http.HttpSessionActivationListener
问题:单选题What is the result?()ACompilation succeeds and 1 is printed.Bcomplication succeeds and 2 is printed.CAn error at line 8 causes compilation to fail.DAn error at line 13 causes complication to fail.EAn error at line 14 causes compilation to fail.
问题:单选题Company.com has decided to use the FUBAR Application Server to host their web application. Unfortunately, the FUBAR Application Server uses the server machine’s file system for its JNDI namespace. Every JNDI lookup performed in the web application is translated into a file 1/0 operation, which results in very poor performance. Which J2EE pattern can help with this performance issue?()ATransfer ObjectBService LocatorCIntercepting FilterDModel-View-Controller
问题:单选题Which security mechanism is employed only on the server-side to limit access to resources or components?()AauthorizationBdata integrityCconfidentialityDauthentication
问题:单选题In form-based authentication, what must be included in the HTML returned from the URL specified by the element?()Aa base-64 encoded user name and passwordBa form that POSTs to the j_security_check URLCan applet that requests the user name and password from the userDa hidden field that supplies the login-constraint used by the application
问题:单选题Which the statement is true about web container session management()?AAccess to session-scoped attributes is guaranteed to be thread-safe by the web container.BTo activate URL rewriting, the developer must use the HttpServletResponse.setURLRewriting method.CIf the web application uses HTTPS, then the web container may use the data on the HTTPS request stream to identify the client.DThe JSESSIONID cookie is stored permanently on the client so that a user may return to the web application and the web container will rejoin that session.
问题:单选题Which the HTTP method represents a request for information about the supported methods on an HTTP server?()AGETBINFOCHEADDTRACEEOPTIONS
问题:单选题Which HTTP method has the characteristic that multiple indential requests may produce side effect beyond those of a single request()?APUTBGETCINFODPOSTEHEADFTRACE
问题:多选题For which three events can web application event listeners be registered? ()Awhen a session is createdBafter a servlet is destroyedCwhen a session has timed outDwhen a cookie has been createdEwhen a servlet has forwarded a requestFwhen a session attribute value is changed
问题:单选题Given 1. public class Foo { 2. public static void main (String [] args) } 3. try { return;} 4. finally { Syste.out.printIn (“Finally”);} 5. } 6. } What is the result( )?AThe program runs and prints nothing.BThe program runs and prints “Finally”.CThe code comiles. But an exception is thrown at runtime.DThe code will not compile because the catch block is missing.
问题:多选题Which two are characteristics of the Intercepting Filter pattern?()Ait provides centralized request handling for incoming requests.BIt forces resource authentication to be distributed across web components.CIt reduces coupling between presentation-tier clients and underlying business services.DIt can be added and removed unobtrusively, without requiring changes to existing code.EIt allows preprocessing and postprocessing on the incoming requests and outgoing responses.
问题:单选题Which is the valid identifier?()AfalseBdefaultC_objectDa-class
问题:单选题Which thefollowingstatements about static inner classes is true?()AAn anonymous class can be declared as static.BA static inner class cannot be a static member of the outer class.CA static inner class does not require an instance of the enclosing class.DInstance member of a static inner class can be referenced using the class name of the staticinner class.
问题:多选题In which three directories, relative to a web application’s root, may a tag library descriptor file reside when deployed directly into a web application?()A/WEB-INFB/META-INFC/WEB-INF/tldsD/META-INF/tldsEWEB-INF/resourcesF/META-INF/resources
问题:单选题Which retrieves the binary input stream on line 13?()Arequest.get Writer ():Brequest.get Reader ():Crequest.get Input Stream():Drequest.get Resource As Stream():Erequest.get Resource As Stream (Servlet Request. REQUEST):
问题:多选题Assume session is an HttpSession, and is not referenced anywhere else in ServletA. Which two changes, taken together, ensure that value is equal to “Hello” on line 23? ()AABBCCDDEE
问题:单选题Which interface must a class implement so that instances of the class are notified after any object is added to a session? ()Ajavax.servlet.http.HttpSessionListenerBjavax.servlet.http.HttpSessionValueListenerCjavax.servlet.http.HttpSessionBindingListenerDjavax.servlet.http.HttpSessionAttributeListener