多項選擇題

Given：
String value = getServletContext（）.getInitParameter（"foo"）； in an HttpServlet and a web applicationdeployment descriptor that contains：
<context-param>
<param-name>foo</param-name>
<param-value>frodo</param-value>
</context-param>
Which two are true？（）

A.The foo initialization parameter CANNOT be set programmatically.
B.Compilation fails because getInitParameter returns type Object.
C.The foo initialization parameter is NOT a servlet initialization parameter.
D.Compilation fails because ServletContext does NOT have a getInitParameter method.
E.The foo parameter must be defined within the element of the deployment descriptor.

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多項選擇題

For which three events can web application event listeners be registered？（）

A.When a session is created
B.After a servlet is destroyed
C.When a session has timed out
D.When a cookie has been created
E.When a servlet has forwarded a request
F.When a session attribute value is changed

多項選擇題

Your web application uses a simple architecture in which servlets handle requests and then forward to aJSP using a request dispatcher. You need to pass information calculated in the servlet to the JSP for view generation.This information must NOT be accessible to any other servlet，JSP or session in the webapp.
Which two techniques can you use to accomplish this goal？（）

A.Add attributes to the session object.
B.Add attributes on the request object.
C.Add parameters to the request object.
D.Use the pageContext object to add request attributes.
E.Add parameters to the JSP’s URL when generating the request dispatcher.

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Given： String value = getServletContext（）.getInitParameter（"foo"）； in an HttpServlet and a web applicationdeployment descriptor that contains： <context-param> <param-name>foo</param-name> <param-value>frodo</param-value> </context-param> Which two are true？（）

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For which three events can web application event listeners be registered？（）

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Given：
String value = getServletContext（）.getInitParameter（"foo"）； in an HttpServlet and a web applicationdeployment descriptor that contains：
<context-param>
<param-name>foo</param-name>
<param-value>frodo</param-value>
</context-param>
Which two are true？（）