Exam 4: Fundamental Data Types

Which of the following statements about constants in Java are true? I. Although not required, constants are commonly named using uppercase letters II. Only integer values can appear as constants III. A variable can be defined with an initial value, but the reserved word final prevents it from being changed IV. A named constant makes computations that use it clearer

Assuming that the user inputs a value of 25000 for the pay and 10 for the bonus rate in the following code snippet, what is the output? public static void main(String[] args) { Scanner in = new Scanner(System.in); System.out.print("Enter the pay: "); Double pay = in.nextDouble(); System.out.print("Enter the bonus rate: "); Double bonus = in.nextDouble(); System.out.println("The new pay is " + (pay + pay * (bonus / 100.0))); }

The typical ranges for integers may seem strange but are derived from

Which one of the following statements displays the output as 54321.00?

What is the value inside the value variable at the end of the given code snippet? public static void main(String[] args) { Int value = 3; Value = value - 2 * value; Value++; }

What is the output of the following code snippet? public static void main(String[] args) { Double a; A = Math.sqrt(9.0) + Math.sqrt(16.0); System.out.println(a); }

What does the following statement sequence print? String str = "Hello"; Int n = str.length(); String mystery = str.substring(0, 1) + str.substring(n - 2, n + 1); System.out.println(mystery);

What is wrong with the following code snippet? Int price; Price = 9.42;

What will be the value inside the variables x and y after the given set of assignments? Int x = 20; Int y = 10; X = (x - y) * 2; Y = x / 2;

Which one of the following is a correct representation of the given mathematical expression in Java? a + b 2

Assume the variable str has been declared to be a String that has at least one character. Which is the following represents the last character in str?

Which of the given System.out.print statements generates the following output? ABCDE"\

What is the output of the following code snippet? public static void main(String[] args) { Int num1 = 10; Int num2 = 5; Int num3 = 200; Num3 = num3 % (num1 * num2); System.out.println(num3); }

Which statement is true?

What will be the value inside the variables a and b after the given set of assignments? Int a = 20; Int b = 10; A = (a +B) / 2; b = a; A++;

Assume the following variable has been declared and given a value as shown: String str = "0123456789"; Which is the value of str.length()?

What (if any) type of error occurs with the following code if the user input is ABC? public static void main(String[] args) { Scanner in = new Scanner(System.in); System.out.print("Enter a number: "); String str = in.next(); Int count = Integer.parseInt(str); System.out.println("Input is " + count); }

What will be printed by the statements below? Int x = 100; Int y = -12; System.out.print ("Sum is " + x + y);

Which of the following statements is correct about constants?

Suppose a phone number, stored as a ten-character string (of digits only) called phoneNumber must be converted into a string that has parentheses around the area code. Which statement below will do that?