Hi Dan,
Question 1
Which of the following statements is not true?
a. An interface that is declared within the body of a class or interface is known as a nested interface.
b. A constant can be a member of an interface.
c. A class declaration can be a member of an interface.
d. A class that implements an interface must implement all of the methods declared within the interface.
e. None of the above.
I think, option d. is a little ambiguous. Can you modify it something like "unless a class is declared abstract" or "A concrete class that implements..."?