When working collaboratively on documents, multiple users can read and edit a document simultaneously.?

Which of the following is not required for counter-controlled repetition?

a) the special value -1 to mark the end of data input b) initial value of the control variable c) increment or decrement by which the control variable is modified each time through the loop d) condition that tests for the final value of the control variable.

If an entity's content is found within the DTD, the entity is known as a(n) _____ entity.

A. internal B. persistent C. contained D. consistent