QUESTION 18 A is a module that returns a value back to the part of the program that called it. O Function O For Loop O While None of the above QUESTION 19 True/False: The tointeger function truncates the fractional part of the real number and returns a real. True QUESTION 20 The term O White box is used to describe any mechanism that accepts input performs some operation that cannot be seen on the input and produces output Black box White cube Black cube None of the above