多項(xiàng)選擇題

Which three are guaranteed to be valid for the element of a web application deployment descriptor？（）

A. FORM
B. DIGEST
C. NORMAL
D. ENCRYPTED
E. CLIENT-CERT

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多項(xiàng)選擇題

Which the three EL expressions， inserted at line 15， are valid and evaluate to "3"？（）

A. ${vals.2 }
B. ${vals ["2"]}
C. ${vals.index }
D. ${vals[index]}
E. ${vals} [index]
F. ${vals.（vals.index）}
G. ${vals[vals[index-1]]}

單項(xiàng)選擇題

Given a JSP error page， which implicit object refers to the uncaught Throwable that resulted in th epage being invoked？（）

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

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