Exam 1z0-808 topic 1 question 210 discussion

A is correct

D is not correct (you can also declare main() in package-private classes.)

Option D is right answer

The main() method in Java is the entry point of a Java program, and it must be defined within a public class. This is a fundamental requirement of the Java language. Without a public class containing the main() method, the Java Virtual Machine (JVM) will not be able to find and execute the program.

a is currect

D is correct the main() method must be defined within a public class in Java. When a Java program is executed, the Java Virtual Machine (JVM) looks for a public class with a main() method to begin the program's execution. If the main() method is not located within a public class, the JVM will not be able to find it and the program will not run.

The answer is letter A, you don't need to think too much. As I have noticed, many simple questions in the OCA exam the answers are usually the most obvious precisely for you to be suspicious and spend more time on them, because it is a very careful exam and any extra time is needed.