Java Key Word Identifier - Quiz

1.	Which of the following are valid identifiers? Please select all the correct answers.
	A.	ident-fier
	B.	$identifier
	C.	2identifier
	D.	a_long_identifier_59

2.	Which of the following are Java keywords? Please select all the correct answers.
	A.	`sizeof`
	B.	`null`
	C.	`extends`
	D.	`final`

3.	What is the output of the `Question` program if it is invoked with the command line? java Question 1 2 3 4 class Question { public static void main(String[] args) { System.out.println(args[1]); } } Please select the best answer.
	A.	1 2 3 4
	B.	1
	C.	2
	D.	2 3 4

4.	What is wrong with the following program? class super { public static void main(string[] arguments) { } } Please select all the correct answers.
	A.	`super` should be `public`.
	B.	`super` is a keyword and may not be used as a class name.
	C.	The argument to the `main()` method should be of type `String[]`.
	D.	The argument to the `main()` method should be named `args`.