Interface

Questions

1. What methods would a class that implements the java.lang.CharSequence interface have to implement?

2. What is wrong with the following interface?

   public interface SomethingIsWrong {
      void aMethod(int aValue){
          System.out.println("Hi Mom");
      }
   }
   

3. Fix the interface in question 2.

4. Is the following interface valid?

   public interface Marker {
   }