Given:

What is the result?（）

单项选择题Click the Exhibit button. What is the result?（）

A.4321
B.0000
C.An exception is thrown at runtime.
D.Compilation fails because of an error in line 18.

多项选择题Given: Which two methods, inserted independently at line 17, correctly complete the Sales class?（）

A.double getSalesAmount() { return 1230.45; }
B.public double getSalesAmount() { return 1230.45; }
C.private double getSalesAmount() { return 1230.45; }
D.protected double getSalesAmount() { return 1230.45; }

单项选择题Given: What is the result?（）

A.Afoo Afoo
B.Afoo Bfoo
C.Bfoo Afoo
D.Bfoo Bfoo
E.Compilation fails.
F.An exception is thrown at runtime.

单项选择题Given: What is the result?（）

A.test
B.null
C.An exception is thrown at runtime.
D.Compilation fails because of an error in line 1.
E.Compilation fails because of an error in line 4.
F.Compilation fails because of an error in line 5.

单项选择题Given: What is the result?（）

A. Compilation succeeds.
B.Compilation fails due to multiple errors.
C.Compilation fails due to an error only on line 20.
D.Compilation fails due to an error only on line 21.
E.Compilation fails due to an error only on line 22.
F.Compilation fails due to an error only on line 12.