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

Question

1. An interface reference may invoke only the methods that the interface declares.
2. To use an interface, a class must define only the methods in the interface that it will need to use.
3. An interface always should be used to specify data and services that will be provided by objects in a hierarchical relationship.
4. A class may implement only one interface.
5. A derived class can add its own instance variables, Shared variables, properties and methods, and it can customize methods and properties it inherits.

Answer 1

1. True
2. False. To use an interface a class must define all methods specified by the interface.
3. False. A MustInherit class should be used to specify data and services that will be
provided by objects in a hierarchical relationship. An interface is used when there is no
default implementation to inherit.
4. False.
5. True.