问题：

[多选]

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.