______________ variables are useful for establishing two-way communication between modules.
A)Value
B)Constant
C)Reference
D)I/O
E)None of the above

Question

Quizplus · Accepted Answer

Reference variables allow for values to be passed back and forth between modules, allowing for two-way communication. Value and constant variables can only pass values in one direction, and I/O variables are used for input/output operations and not specifically for communication between modules.

______________ Variables Are Useful for Establishing Two-Way Communication Between Modules