单项选择题
Which statement is true about web container session management？（）
A.Access to session-scoped attributes is guaranteed to be thread-safe by the web container.
B.To activate URL rewriting， the developer must use the HttpServletResponse.setURLRewriting method.
C.If the web application uses HTTPS， then the web container may use the data on the HTTPS request stream to identify the client.
D.The 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.
相关考题
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单项选择题
Your web application requires the adding and deleting of many session attributes during a complex usecase. A bug report has come in that indicates that an important session attribute is being deleted too soonand a NullPointerException is being thrown several interactions after the fact. You have decided to create asession event listener that will log when attributes are being deleted so you can track down when theattribute is erroneously being deleted. Which listener class will accomplish this debugging goal？（）
A.Create an HttpSessionAttributeListener class and implement the attributeDeleted method and log the attribute name using the getName method on the event object.
B.Create an HttpSessionAttributeListener class and implement the attributeRemoved method and log the attribute name using the getName method on the event object.
C.Create an SessionAttributeListener class and implement the attributeRemoved method and log the attribute name using the getAttributeName method on the event object.
D.Create an SessionAttributeListener class and implement the attributeDeleted method and log the attribute name using the getAttributeName method on the event object. -
多项选择题
You need to store a Java long primitive attribute， called customerOID， into the session scope. Which two code snippets allow you to insert this value into the session？（）
A.long customerOID = 47L；session.setAttribute（"customerOID"， new Long（customerOID））；
B.long customerOID = 47L；session.setLongAttribute（"customerOID"， new Long（customerOID））；
C.long customerOID = 47L；session.setAttribute（"customerOID"， customerOID）；
D.long customerOID = 47L；session.setNumericAttribute（"customerOID"， new Long（customerOID））； -
单项选择题
Given the definition of MyServlet： 11.public class MyServlet extends HttpServlet { 12.public void service（HttpServletRequest request， 13.HttpServletResponse response） 14.throws ServletException， IOException { 15.HttpSession session = request.getSession（）； 16.session.setAttribute（"myAttribute"，"myAttributeValue"）； 17.session.invalidate（）； 18.response.getWriter（）.println（"value=" + 19.session.getAttribute（"myAttribute"））； 20.} 21.} What is the result when a request is sent to MyServlet？（）
A.An IllegalStateException is thrown at runtime.
B.An InvalidSessionException is thrown at runtime.
C.The string "value=null" appears in the response stream.
D.The string "value=myAttributeValue" appears in the response stream.
