Java Method Declarations and Usage

The video tutorial by Mr. Monroe covers Java methods, starting with an introduction to defining and calling methods. It explains access modifiers like public and private, and the static keyword. The tutorial demonstrates writing a method to calculate the average of two numbers, emphasizing parameter passing and return values. It also discusses the main method and how to handle command line arguments, providing a comprehensive understanding of Java methods and their execution flow.

What is the purpose of the main method in a Java program?

• To declare variables

• To define the class

• To print output to the console

• To serve as the entry point of the program

Which keyword is used to make a method accessible to all classes?

• public

• private

• protected

• default

What does the 'void' return type signify in a method declaration?

• The method returns an integer

• The method returns a string

• The method does not return any value

• The method returns a boolean

How do you call a method named 'printHello' in the main method?

• call printHello();

• printHello();

• run printHello();

• execute printHello();

What will be the output of the following code snippet? System.out.println(1); printHello(); System.out.println(2);

• 1 hello 2

• hello 1 2

• 1 2

• 2 hello 1

What is the correct way to declare a method that returns the average of two doubles?

• public static String average(double a, double b)

• public static int average(double a, double b)

• public static double average(double a, double b)

• public static void average(double a, double b)

What will happen if a non-void method does not have a return statement?

• The method will return 0

• The method will return an empty string

• The method will cause a compilation error

• The method will return null

What is the result of the following method call? average(2.0, 3.0)

• 5.0

• 3.0

• 2.0

• 2.5

What is the purpose of the 'args' parameter in the main method?

• To store command line arguments

• To return values from the main method

• To declare local variables

• To define the return type of the main method

What will be the output if the following command line arguments are passed: "hi", "hello"? System.out.println(args.length);

• 2

• 1

• 0

• 3