A. authorization
B. data integrity
C. confidentiality
D. authentication
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A. a base-64 encoded user name and password
B. a form that POSTs to the j_security_check URL
C. an applet that requests the user name and password from the user
D. a hidden field that supplies the login-constraint used by the application
A. id
B. type
C. name
D. class
E. scope
F. create
A. response.getWriter（）
B. response.getOutputStream（）
C. response.getOutputWriter（）
D. response.getWriter（）.getOutputSTream（）
E. response.getWriter（Writer.OUTPUT_BINARY）
A. GET
B. INFO
C. HEAD
D. TRACE
E. OPTIONS
A. Account account = request.get Resource（”account”）：
B. Account account = request.get Attribute （“account”）：
C. Account account = request.get Parameter （account”）：
D. Account account = （Account）request.getResource （“account”）：
E. Account account = （Account） request.get Attribute （“account”）：
F. Account account = （Account） request.get Paramter （“account”）：
What is the result？（）
A. Compilation succeeds.
B. An error at line 2 cause compilation to fail.
C. An error at line 9 cause compilation to fail.
D. An error at line 10 cause compilation to fail.
E. An error at line 11 cause compilation to fail.
What is the result？（）
A. The program runs and prints “Hello”
B. An error causes compilation to fail.
C. The program runs and prints “Hello world!”.
D. The program runs but aborts with an exception.
What is the result？（）
A. foo has the value””
B. foo has the value null.
C. An exception is thrown.
D. The code will not compile.
A. The Error class is a Runtime Exception.
B. No exceptions are subclasses of Error.
C. Any statement that may throw an Error must be enclosed in a try block.
D. any statement that may throw an Exception must be enclosed in a try block.
E. Any statement that may throw an Runtime Exception must be enclosed in a try block.
Which code snippet inserted at line 12 cause the client to redirect tohttp：//www.example.com？（）
A. response.send Redirect （http：//www.example.com）：
B. response.send Redirect （new URL （“http：//www.example.com”））；
C. Request Dispatcher rd= get Servlet Context （）. Get Request Dispatcher （ http：//www.example.com”）’ rd. forward （request. Response）：
D. Request Dispatch rd= Get Servlet Context （）.get Request Dispatcher（ New URL （http：//www.example.com））； Rd. forward （request.response）：
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Which the two are true regarding a web application class loader？（）
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Which two classes or interfaces provide a getSession method？（）
Which two are true？（）
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