Applying Class Access Modifiers

Question 1

Define a top level java class !

Answer 1

A top-level class is a class that is declared with the public access modifier and resides in its own .java file

Question 2

Which access modifiers can be applied to a top level java class ?

Answer 2

Classes at the top level (outside of other classes and interfaces ) not nested within other classes or interfaces can only have the public and the package-private default access modifiers

Question 3

Define each one of them !

Answer 3

public class : means that the class can be accessed from inside and outside the package

package-private class : means that the class can only be accessed from inside the same package

Question 4

How many public classes/interfaces can we have in one java file ?

Answer 4

We can only have one public class in one java file.

We can only have one public interface in a java file.

We can not have a public class and a public interface in the same java file.

Question 5

Which access modifiers can be applied to a top level interface ?

Answer 5

A top level interface (an interface that is not nested within other interfaces) can only have public or default access modifiers