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Data Types and Variables

Data Types and Variables
How many primitive data types are there in Java?

9
6
7
8

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Data Types and Variables
What will be output of following program?public class Test{ public static void main(String[] args){ byte b=127; b++; b++; System.out.println(b); }}

2
129
-127
Compiler error
None of these

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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 ) ; }}

Compilation Error
21
22
20
Throws Exception

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Data Types and Variables
The following program:public class Test{ static boolean isOK; public static void main(String args[]){ System.out.print(isOK); } }

Will not compile as boolean can never be static
Prints true
Prints false
Will not compile as boolean is not initialized

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Data Types and Variables
In Java byte, short, int and long all of these are

unsigned
signed
None of these
Both of the above

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Data Types and Variables
What will be output of the following program code?public class Test{public static void main(String[] a){short x = 10;x = x*5;System.out.print(x);} }

10
50
None of these
Compilation Error

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