All Java applications must have a method named __

a. method( )

b. main( )

c. java( )

d. Hello( )

The correct answer and explanation is:

The correct answer is:

b. main()

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Explanation:

In Java, the main() method is the entry point for any standalone Java application. When a Java program is executed, the Java Virtual Machine (JVM) looks for the main() method to begin execution. Without the main() method, the application will not run.

Key Features of the main() Method:

1. Standard Signature: public static void main(String[] args)
   • public: This ensures the main() method is accessible to the JVM.
   • static: The method belongs to the class and can be invoked without creating an object of the class.
   • void: The method does not return any value.
   • String[] args: This parameter allows command-line arguments to be passed to the program.
2. JVM Dependency: The JVM specifically looks for this method with the exact signature. If the method signature is altered (e.g., changing void to int or omitting static), the program will fail to run and throw an error.
3. Role in Execution: The main() method serves as the starting point for program execution. Any code outside of this method will not execute unless invoked within the program.

Why main() Is Necessary:

• It provides a consistent structure for running Java programs across all platforms.
• It allows the programmer to define the sequence of actions that the program should take during its execution.

Example:

public class HelloWorld {
    public static void main(String[] args) {
        System.out.println("Hello, World!");
    }
}

When this program is executed, the JVM calls main() and displays Hello, World!.

Incorrect Options:

• a. method(): Not a standard entry point.
• c. java(): Not recognized as an entry point.
• d. Hello(): User-defined method, not the standard entry point.