True/False: When a programmer creates an abstract data type, he or she can decide what values are acceptable for the data type, as well as what operations may be performed on the data type.

The Abstract data type is used when data type behavior is used to define the data type. Generally, an abstract data type is used to define the class and function for any programming language which describes as follows--

An abstract class is a class whose object is not initiated or created.
An abstract function is a defined function whose definition is not given.

For example, if a user wants to create an abstract class then he needs to inherit that class to another class and the derived class object call that class members.

Here the question wants to say that the user needs to know about an abstract data type before it needs to create which is the correct statement hence True is the right answer.