Java Programming Practice Questions

int a = 5, b = 7; System.out.println("Result: " + (a++ + ++b));

• Result: 12

• Result: 13

• Result: 14

• Result: 15

Which method will correctly determine if two String variables, str1 and str2, contain the exact same sequence of characters?

• str1 == str2

• str1.equals(str2)

• str1.compareTo(str2)

• str1.match(str2)

Identify the incorrect statement regarding constructors in Java.

• Constructors must have the same name as the class.

• Constructors can return any type.

• Constructors can be overloaded.

• Constructors are used to initialize objects.

boolean flag = true; if (flag == false) { System.out.println("False"); } else { System.out.println("True"); }

• False

• True

• Compilation Error

• Runtime Error

Which keyword in Java is used to prevent method overriding?

• static

• final

• void

• private

Choose the correct way to declare and initialize a one-dimensional integer array.

• int arr[] = new int[];

• int arr[5] = {1,2,3,4,5};

• int[] arr = new int[]{1,2,3,4,5};

• int arr = {1,2,3,4,5};

Which access modifier restricts access only within its own class?

• public

• protected

• private

• default

int x = 4; do { System.out.print(x); x++; } while (x <= 6);

• 456

• 45

• 567

• 4

Which exception is thrown by Java when dividing by zero?

• ArithmeticException

• IOException

• NullPointerException

• ArrayIndexOutOfBoundsException

String s = "hello"; What is the result of the expression s.charAt(1)?

• h

• e

• l

• o