CHAPTER $7($Using Methods

$15.$ What is a correct declaration for a method that receives two double arguments, calculates and displays the difference between them, and returns nothing?

a$.$ private static void Ca$1$cDifference$($double price$1,$ price$2)$

b$.$ private static void CalcDifference$($doub$7$e price$1,$ double price$2)$

c$.$ Both of these are correct.

d$.$ None of these are correct.

$16.$ What is a correct declaration for a method that receives two double arguments and sums them but does not return anything?

a$.$ private static void CalcSum$($double firstValue, double secondValue$)$

b$.$ private static void CalcSum$($double price$1,$ doub$7$e price$2)$

c$.$ Both of these are correct.

d$.$ None of these are correct.

$17.$ A method is declared as private static double CalcPay $($int hoursWorked$).$ Suppose you write a Main$()$ method in the same class and that it contains the declarations int hours $=35$; and double pay; Which of the following represents a correct way to call the CalcPay$()$ method from the Main$()$ method?

a$.$ hours $=$ CalcPay$()$;

c$.$ pay $=$ CalcPay$($hourshorkee$)$;

b$.$ hours $=$ Main.CalcPay$()$;

d$.$ pay $=$ CalcPay$($hours$)$;

$18.$ Suppose the value of IsRateOK$()$ is true, and the value of IsQuantityOKO is false When you evaluate the expression IsRateOK$()$ II IsQuantityOK$(),$ which ofthe following is true?

a$.$ Only the method IsRateOK$()$ executes.

b$.$ Only the method IsQuantityOK$()$ executes.

c$.$ Both methods execute.

d$.$ Neither method executes.

$19.$ Suppose the value of i sRateOK$()$ is true, and the value of I sQuantityOK$()$ is f l: When you evaluate the expression IsRateOK$()$ & IsQuantityOK$(),$ which of of following is true?

a$.$ Only the method IsRateOK$()$ executes.

b$.$ Only the method IsQuantityOK$()$ executes.

c$.$ Both methods execute.

d$.$ Neither method executes.