Exam 2: Fundamental Data Types

What is the output of the following code snippet? Public static void main(String[] args){ { String str1; Str1 = "I LOVE MY COUNTRY"; String str2 = str1.substring(4, 9); System.out.println(str2); }

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

Which of the following statements is correct about constants?

What is the output of the following code snippet? String firstname = "William"; String lastname; System.out.println("First: " + first); System.out.println("Last: " + lastname);

What is the value of Math.pow(2, 3)?

How do you extract the first 5 characters from the string str?

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 does the following statement sequence print if the user input is 123? Public static void main(String[] args) { Scanner in = new Scanner(System.in); System.out.print("Enter a number "); Int myInt = in.nextInt(); MyInt += 456; System.out.println(myInt); }

Which of the following statements with comments is(are) valid? I. int cnt = 0; /* Set count to 0 II. int cnt = 0; /* Set count to 0 */ III. int cnt = 0; // Set count to 0

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

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); }

What is the output of this code snippet? Double average; Int grade1 = 87; Int grade2 = 94; // System.out.print("The average is " + (grade1 + grade2) / 2.0); System.out.print("The average is " + average);

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

What happens to the fractional part when a division is performed on two integer variables?

The assignment operator

What is the correct way to invoke methods on variables in Java that are strings?

Which one of the following statements displays the output as +00321.00?

What is the output of the following code snippet? Public static void main(String[] args) { Int s; Double f = 365.25; S = f / 10; System.out.println(s); }

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?

What is the value of Math.pow(3, 2)?