Which source is better for online examination system project

In mmf2, what is the grid? a. a toolbar that lets you open libraries and use the objects in them in your games b. an object that creates the background or other scenery for a game c. a set of vertical and horizontal lines that are usually invisible in the play area d. a set of vertical and horizontal lines that are usually visible in the play area

Facial expressions and gestures are examples of messages.

Write a program that asks the user to enter the name of an input file. if the file does not exist, the program should prompt the user to enter the file name again. if the user types quit in any uppercase/lowercase combinations, then the program should exit without any further output.