Which one is a valid declaration of a boolean?

Which one is a valid declaration of a boolean?

2) 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); 
       } 
 }

3) Which one is a valid declaration of a boolean?

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) Java is a _______ language.