Which of these values can a boolean variable contain?

Which of these values can a boolean variable contain?

2) In Java, the word true is ................

3) Literal can be of which of these data types?

4) What will be the output for the below code ?

public class Test
  { 
       public static void main(String[] args)
  {
       byte i = 128;
       System.out.println(i); 
       } 
 }

5) Which of these is long data type literal?