The ____ property of the Calendar object references the date the user tapped or clicked in the Calendar object.

Which of the following is not an abstract data type?

a. An int. b. A user-defined class. c. A for loop. d. None of the above are abstract data types.

?_________ is a method of organization in which data sources are interconnected through a series of links that users activate to jump from one data source to another.

Fill in the blank(s) with the appropriate word(s).