When working with a path, different folders are always separated by the _______ character

Typing a ________ after a URL on a slide formats the text as a hyperlink

A) colon B) slash C) space D) comma

What command is used to enforce a precondition that the peek() method cannot work on an empty stack.

a. result = false; b. if (top < MAX_STACK - 1) c. return top < 0; d. assert (!isEmpty());