Check your knowledge

1.

Which of the following options is true of an interface object?

All of the following.

You use an interface object to declare an interface name along with its methods and then apply the implements keyword along with the interface names on objects that implement the interface methods.

An interface object contains signatures and must be implemented by other objects.

An interface object makes it easier to reuse code.

2.

How can you handle removed enum extension values?

Allow it to point to an unknown value.

Have an app code add the validation logic.

Have the platform catch when a non-valid enum value is provided by using the UnknownValueImplementation property.

3.

How can you add signature stubs for missing interface methods?

Use a QuickFix CodeAction.

Call a MissingInterface procedure.

Extend the signature.

Create a new signature stub by using a standard code.

Answer the following questions to see what you've learned.

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