002_Java Methods

What is the return type of a method that does not return any value?

• int

• void

• double

• String

Which of the following is the correct syntax for defining a method in Java?

• methodName returnType(parameters) { }

• returnType methodName(parameters) { }

• parameters methodName(returnType) { }

• returnType(parameters) methodName { }

What will be the output of the following code snippet? ```java public class Calculator { public int addNumbers(int a, int b) { return a + b; } public static void main(String[] args) { Calculator calc = new Calculator(); int result = calc.addNumbers(5, 7); System.out.println("Sum: " + result); } } ```

• Sum: 10

• Sum: 12

• Sum: 57

• Sum: 0

Identify the method type: `public void greet() { System.out.println("Hello, Welcome!"); }`

• Method with Return Value

• Method with Parameters

• Method with No Return Value

• Static Method

Which of the following methods is an example of method overloading?

• `public void display(int a) { }`

• `public void display(String str) { }`

• Both A and B

• None of the above

What is the purpose of method overloading in Java?

• To increase the execution time of a program

• To allow multiple methods with the same name but different parameters

• To decrease the number of methods in a class

• To make methods static

Consider the method `public double square(double num) { return num * num; }`. What is the return type of this method?

• int

• void

• double

• float

Which of the following statements is true about static methods?

• They can only be called after creating an object of the class.

• They can be called without creating an object of the class.

• They cannot have parameters.

• They must always return a value.

What will be the output of the following code snippet? ```java public class MathUtils { public static int multiply(int a, int b) { return a * b; } public static void main(String[] args) { int result = multiply(3, 4); System.out.println(result); } } ```

• 7

• 12

• 34

• 0

What is the base case in the following recursive method? ```java public int factorial(int n) { if (n == 0) return 1; return n * factorial(n - 1); } ```

• `if (n == 1) return 0;`

• `if (n == 0) return 1;`

• `return n * factorial(n - 1);`

• `return 0;`