问题：单选题Which is the valid identifier？（）AfalseBdefaultC_objectDa-class
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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：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.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1. class A { 2. public byte file Number （ ） { 3. return l; 4. } 5. } 6. 7. Class B extends A { 8. public short getNumber（ ） { 9. return 2; 10. } 11. 12. public short getNumber（ ） { 13. B b = new B（ ）; 14. System.out.printIn(b.getNumber（ ）); 15. } 16. } What is the result（）?ACompilation succeeds and l is printed.BCompilation succeeds and 2 printed.CAn error at line 8 cause compilation to fail.DAn error at line 14 cause complication to fail.EComplication succeeds but an exception is thrown at line 14.
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：单选题Which will declare the method that forces a subclass to implement it？（）Apublic double methoda （）：Bstatic void methoda（double d1） {}Cpublic native double methoda （）：Dabstract public foid methoda （）：Eprotected void methoda （double d1） {}
问题：单选题Which the JSTL code snippet can be used to import content from another web resource？（）A<c：import url=*foo.jsp”/> B<c：import page=*foo.jsp”/> C<c：include url=*foo.jsp”/> D<c：include page=*foo.jsp”/> EImporting cannot be done in JSTL. A standard action must be used instead.
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
问题：单选题What is the result？（）AThe program runs and prints nothing.BThe program runs and prints “Equal”.CAn error at line 5 cause compilation to fail.DThe program runs but aborts with an exception.
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：多选题Given a header in an HTTP request： X-Retries：4 Which two retrieve the value of the header from a given ServletRequest request？ （）Arequest.getHeader （“X-Retries”）Brequest.getIntHeader （“X-Retries”）Crequest.getRequestHeader （“x-Retries”）Drequest.getHeaders （“X-Retries”）.get （0）Ere request.getRequest Headers （“X-Retries”）. Get （0）
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 a JSP error page， which implicit object refers to the uncaught Throwable that resulted in th epage being invoked？（）AErrorBExceptionCThrowableDRequest errorERequest exception
问题：单选题Given that session is a valid HttpSession object： Int max = session.getAttribute（“MyReallyLongName”）； Which is true？（）AThe value returned needs to be cast to an int.BThe getAttribute methos takes two arguments.CPrimitive CANNOT be stored in the HttpSession.DThe HttpSession attribute name must NOT exceed eight characters.
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 the HTTP method represents a request for information about the supported methods on an HTTP server？（）AGETBINFOCHEADDTRACEEOPTIONS
