^{Need assistance for a hw assignment}

Question 1 (1 point)

If A is the base class, B is the derived class, and the constructors for both classes are no-arg, which statement generates a compiler error?

Question 1 options:

A	B x = new A( );
B	B x = new B( );
C	A x = new A( );
D	A x = new B( );

Question 2 (1 point)

Which choice defines the interface I that has required method f?

Question 2 options:

A	public interface I implements f;
B	public interface I { public void f( ); }
C	public interface I requires f;
D	public interface I {f};

Question 3 (1 point)

Which choice is the first line of a class A that implements the interface I?

Question 3 options:

A	public class A interface I {
B	public class A implements I {
C	public interface I for class A {
D	public class A extends I {

Question 4 (1 point)

What is the required method of the Comparable interface?

Question 4 options:

A	ltGt
B	compareTo
C	comparator
D	compare

Question 5 (1 point)

For this problem, use the Speaker interface, from the Interfaces Example. Recall that the Speaker interface requires any class implementing it to supply a speak method. Suppose that a HashMap collection is defined as:

HashMap col = new HashMap( ); Which loop calls the speak method from each value in the collection col.

Question 5 options:

A	for(Speaker s : col) { col.speak( )); }
B	for(Speaker s : col) { s.speak( ); }
C	for(Speaker s : col.values( )) { s.speak( ); }
D	for(Speaker s : col.values( )) { col.speak( ); }