make the program run faster
reveal as LITTLE about the inner workings of the interface
reveal as MUCH as possible about the inner workings of the interface
reveal as MUCH as possible all the outer workings of the interface

QUESTION 2: Encapsulation prevents the program from becoming?

Too dependent
Independent
Interdependent

QUESTION 3: Encapsulation allows:

Fixing bugs
Porting
Improving performance
All the above