單項(xiàng)選擇題

public class foo {
static String s；
public static void main （String[]args） {
system.out.printIn （“s=” + s）；
}
}
What is the result？（）

A. The code compiles and “s=” is printed.
B. The code compiles and “s=null” is printed.
C. The code does not compile because string s is not initialized.
D. The code does not compile because string s cannot be referenced.
E. The code compiles， but a NullPointerException is thrown when toString is called.

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多項(xiàng)選擇題

public interface Foo{
int k = 4；
}
Which three are equivalent to line 2？（）

A. Final int k = 4；
B. Public int k = 4；
C. Static int k = 4；
D. Private int k = 4；
E. Abstract int k = 4；
F. Volatile int k = 4；

單項(xiàng)選擇題

int index = 1；
String [] test = new String[3]；
String foo = test[index]；
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

public class foo { static String s； public static void main （String[]args） { system.out.printIn （“s=” + s）； } } What is the result？（）

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public interface Foo{ int k = 4； } Which three are equivalent to line 2？（）

int index = 1； String [] test = new String[3]； String foo = test[index]； What is the result？（）

public class foo {
static String s；
public static void main （String[]args） {
system.out.printIn （“s=” + s）；
}
}
What is the result？（）

public interface Foo{
int k = 4；
}
Which three are equivalent to line 2？（）

int index = 1；
String [] test = new String[3]；
String foo = test[index]；
What is the result？（）