Exam 3: Decision Structures

In an if/else statement, if the boolean expression is False:

What will be printed when the following code is executed? Double x = 45678.259; System.out.printf("%,.2f", x);

What does the following code display? Double x = 12.3798146; System.out.printf("%.2f\n", x);

What would be the value of x after the following statements were executed? Int x = 10; Switch (x) { Case 10: X += 15; Case 12: X -= 5; Break; Default: X *= 3; }

To do a case insensitive compare which of the following could be used to test the equality of two strings, str1 and str2?

What will be the value of pay after the following statements are executed? Int hours = 45; Double pay, payRate = 10.00; Pay = hours <= 40 ? Hours * payRate : 40 * payRate + (hours - 40) * payRate * 1.5;

What would be the value of bonus after the following statements are executed? Int bonus, sales = 1250; If (sales > 1000) Bonus = 100; If (sales > 750) Bonus = 50; If (sales > 500) Bonus = 25; Else Bonus = 0;

What is the value of ans after the following code has been executed? Int x = 35; Int y = 20, ans = 80; If (x < y); Ans += y;

Which of the following expressions will determine whether x is less than or equal to y?

Which of the following is the correct boolean expression to test for: int x being a value between, but not including, 500 and 650, or int y not equal to 1000?

In a switch statement, each of the case values must be unique.

The if/else statement will execute one group of statements if its boolean expression is true or another group if its boolean expression is False.

These operators use two operands:

If str1 and str2 are both Strings, which of the following expressions will correctly determine whether they are equal? (1)(str1 == str2) (2) str1.equals(str2) (3)(str1.compareTo(str2) == 0)

A Boolean expression is one that is either:

Which one of the following is the not equal operator?

What will be the value of x after the following code is executed? Int x = 75; Int y = 60; If (x > y) X = x - y;

Because the && operator performs short-circuit evaluation, your boolean expression will usually execute faster if the subexpression that is most likely False is on the left of the && operator.

If chr is a character variable, which of the following if statements is written correctly?

An important style rule you should adopt for writing if statements is to write the conditionally executed statement on the line after the if statement.