Data Types and Variables
What is the output of the following program?public class Test{static int x = 10 ; public static void main(String[] a){ Test test = new Test( ) ; Test test1 = new Test( ) ; test.x += 1 ; System.out.println( test.x + test1.x ) ; }}

22
Compilation Error
Throws Exception
20
21

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Data Types and Variables
Automatic type conversion in Java takes place when

Two type are compatible and size of destination type is equal of source type.
All of these
Two type are compatible and size of destination type is shorter than source type.
Two type are compatible and size of destination type is larger than source type.

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Data Types and Variables
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.$7); System.out.println(test.do); System.out.println(test._$); }}

None of these
7 0 0
Compile error - $7 is not valid identifier.
7 9 0
Compile error - do is not valid identifier.

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