A. Error
B. Exception
C. Throwable
D. Request error
E. Request exception

A. The function method must have the signaturepublic： String spin（）.
B. The method must be mapped to the logical name “spin” in the web.xml file.
C. The function method must have the signature：public String spinIt（）.
D. The function method must have the signature：public static String spin（）.
E. The function method must have the signature：public static String spinIT（）.
F. The function class must be named Spinner， and must be in the package com.example.

A. ${product ID}
B. ${param.productID}
C. ${params.productID}
D. ${params.productID[1]}
E. ${paramvalues.productID}
F. ${paramValues.productID[0]}
G. ${pageContext.request.productID}

A. id
B. name
C. type
D. param
E. property
F. reqParam
G. attribute

A. Default costs 0.0
B. Default costs 49.95
C. Default costs 39.95
D. The Matrix costs 0.0
E. The Matrix costs 49.95
F. The Matrix costs 39.95

A. getCreationTime
B. invalidateAfter
C. getLastAccessedTime
D. getMaxInactiveInterval

A. javax.servlet.http.HttpServletRequest
B. javax.servlet.http.HttpSessionContext
C. javax.servlet.http.HttpsServletResponse
D. javax.servlet.http.HttpSessionBindingEvent
E. javax.servlet.http.HttpSessionAttributeEvent

A. HttpSessionListener
B. HttpSessionBindingListener
C. HttpSessionTimedOutListener
D. HttpSessionAttributeListener
E. HttpSessionActivationListener
F. HttpSessionPassivatedListener

A. The value returned needs to be cast to an int.
B. The getAttribute methos takes two arguments.
C. Primitive CANNOT be stored in the HttpSession.
D. The HttpSession attribute name must NOT exceed eight characters.

A. All URLs returned by the server are rewritten.
B. An HttpSession object is created if necessary.
C. The user name and password of the user are checked.
D. The session ID is stored in the HTTP response as a cookie.

A. javax.servlet.http.HttpSessionListener
B. javax.servlet.http.HttpSessionBindingListener
C. javax.servlet.http.HttpSessionCreationListener
D. javax.servlet.http.HttpSessionActivationListener