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What is a Java interface? It is a __________ ? base class derived class set of...

What is a Java interface? It is a __________ ?

base class

derived class

set of instance variables

specification of required methods, including method names, signatures, and return values

What is the required method of the Comparable interface?

comparator

compare

compareTo

spaceship

What is the load factor for a HashMap collection?
It is the maximum ___________ of the HashMap collection.

capacity

number of empty cells

percentage of empty cells

percentage of occupied cells

Which choice defined a HashMap with integer keys and string values?

HashMap<int, str> hm = new HashMap<int, str>( )

HashMap<int, string> hm = new HashMap<int, string>( )

HashMap<int, String> hm = new HashMap<int, String>( )

HashMap<Integer, String> hm = new HashMap<Integer, String>( )

What is the first line of class A that implements the interface I?

public class A extends I {

public class A implements I {

public class A interface I {

public interface I for class A {
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Answer #1 

1)  specification of required methods, including method names, signatures, and return values
2)  compareTo
3)  percentage of occupied cells
4)  HashMap<Integer, String> hm = new HashMap<Integer, String>( )
5)  public class A implements I {
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