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What is the output for the below code ?
public class Test{
int _$;
int $7;
int do;
public static void main(String argv[]){
Test test = new Test();
test.$7=7;
test.do=9;
System.out.println(test.$7);
System.out.println(test.do);
System.out.println(test._$);
}
}

A.	7 9 0	B.	7 0 0
C.	Compile error - $7 is not valid identifier.	D.	Compile error - do is not valid identifier.

Answer and Explanation

Answer:Compile error - do is not valid identifier.

Explanation:
$7 is valid identifier. Identifiers must start with a letter, a currency character ($), or
underscore ( _ ). Identifiers cannot start with a number. You can't use a Java keyword as an identifier. do is a Java keyword.

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