Literal can be of which of these data types?

Literal can be of which of these data types?

2) Which of these can not be used for a variable name in Java?

3) Which of these is long data type literal?

4) What is the output for the below code ?

public class Test
{
      public static void main(String[] args)
 { 
             int i = 010; 
             int j = 07; 
             System.out.println(i); 
             System.out.println(j); 
       } 
 }

5) Which of these occupy first 0 to 127 in Unicode character set used for characters in Java?