boolean

AP Computer Science A - 4.4 Nested Iteration

AP Computer Science A - 5.6 Writing Methods

AP Computer Science A - 7.4 Developing Algorithms Using ArrayLists

AP Computer Science A - Unit 1 Overview: Primitive Types

Consider the following method: public void printPrimeNumbers(int n) { for (int i = 2; i <= n; i++) { boolean isPrime = true; for (int j = 2; j <= Math.sqrt(i); j++) { if (i % j == 0) { isPrime = false; break; } } if (isPrime) { System.out.print(i + " "); } } } Assume that the method printPrimeNumbers(20) appears in a method in the same class. What is printed as a result of the method call?

Consider the following method. public boolean isValidEmail(String email) { /* implementation not shown */ } Which of the following lines of code, if located in a method in the same class as isValidEmail, will compile without an error?

Consider the following method: public static boolean isPalindrome(String word) { int length = word.length(); for (int i = 0; i < length / 2; i++) { if (word.charAt(i) != word.charAt(length - 1 - i)) { return false; } } return true; } Assume that the following code segment appears in a class: boolean result = isPalindrome("racecar"); System.out.println("Is 'racecar' a palindrome? " + result); What is printed as a result of executing the code segment?

Consider the following method: public static boolean isEven(int number) { return number % 2 == 0; } Assume that the following code segment appears in a class: boolean result = isEven(7); System.out.println("Is 7 an even number? " + result); What is printed as a result of executing the code segment?

How many parameters does the method with header "public void doSomething (double a, double b, int c, boolean flag, String text)" have?

What does the following code do? public static boolean codeBlock(int[] array) { for (int i = 0; i < array.length - 1; i++) { for (int j = i + 1; j < array.length; j++) { if (array[j] == array[i]) { return true; } } } return false; }

What does the following code do? public static boolean codeBlock(int[] array) { for (int i: array) { if (i >= 25) { return false; } } return true; }

What does the following code do? public static boolean codeBlock(ArrayList<Integer> array) { for (int i: array) { if (i % 3 == 1 || i % 3 == 2) { return false; } } return true; }

Which statement correctly initializes an array of type `boolean` named `flags` with the elements `true`, `false`, and `true` in that order?