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Question
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.$7);
System.out.println(test.do);
System.out.println(test._$);
}
}
Options:
A .  7 9 0
B .  7 0 0
C .  Compile error - $7 is not valid identifier.
D .  Compile error - do is not valid identifier.
E .  None of these
Answer: Option D

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