Methods Revisited Quiz

Below are the answers to the Methods Revisited Quiz, along with a brief discussion.

1. y and z are optional, because they use = to assign a default value.

2. x=1, y=2, z=4. The value passed in goes to x, while y and z take on their default values.

3. x=2, y=3, z=9. x and z are both assigned a value with named parameters, while y takes on its default value.

4. True.

5. True.

6a. Not allowed because no parameter is available to go into the x variable.

6b. Allowed. The 1 goes into the x variable and the numbers array is empty.

6c. Allowed. The 1 goes into the x variable and the numbers array contains [2, 3, 4, 5].

6d. Allowed. The 1 goes into the x variable and the numbers array takes on the value passed in.

7. True. When you use out or ref, the receiving method ends up with access to the actual original variable.

8. True. (See #7.)

9. True. out requires that the called method assign a value to the variable. It is considered an output parameter.

10. False. With ref, it is expected that the calling method assigns a value to the variable. The called method can assume that it was already initialized.