Given:

What can directly access and change the value of the variable name?（）

单项选择题Given: What is the result?（）

A.The code runs with no output.
B.An exception is thrown at runtime.
C.Compilation fails because of an error in line 20.
D.Compilation fails because of an error in line 21.
E.Compilation fails because of an error in line 23.
F.Compilation fails because of an error in line 25.

多项选择题Which three statements are true?（）

A.A final method in class X can be abstract if and only if X is abstract.
B.A protected method in class X can be overridden by any subclass of X.
C.A private static method can be called only within other static methods in class X.
D.A non-static public final method in class X can be overridden in any subclass of X.
E.A public static method in class X can be called by a subclass of X without explicitly referencing the class X.
F. A method with the same signature as a private final method in class X can be implemented in a subclass of X.
G. A protected method in class X can be overridden by a subclass of X only if the subclass is in the same package as X.

多项选择题Given: Which three are valid?（）

A.p0 = p1;
B.p1 = p2;
C.p2 = p4;
D.p2 = (ClassC)p1;
E.p1 = (ClassB)p3;
F.p2 = (ClassC)p4;

单项选择题Given: What is the result?（）

A.Canada
B.null Canada
C.Canada null
D.Canada Canada
E.Compilation fails due to an error on line 26.
F.Compilation fails due to an error on line 29.

单项选择题Given: What is the result? （）

A.three
B.other
C.An exception is thrown at runtime.
D.Compilation fails because of an error on line 12.
E.Compilation fails because of an error on line 13.
F.Compilation fails because of an error on line 15.