When a client code programmer uses a class whose implementation is in a separate file from its interface, that implementation code is merged with the client’s code during the:

Answer the following statements true (T) or false (F)

1. Attempting to instantiate an object of an abstract class is a logic error. 2. All objects of a class are guaranteed to provide the functionality described by any interface that the class implements. 3. An interface describes a set of methods that can be called on an object and it provides concrete implementations for the methods. 4. Objects of unrelated classes that implement the same interface can respond to the method calls of that interface polymorphically. 5. If a class leaves one method in an interface undeclared, the class is implicitly declared by Visual Basic as a MustInherit class.

How do we know the software running safety-critical systems is perfect?

a. by using the debugging process b. by using a special kind of software to test it c. by letting users try out the software before it is released d. we can’t