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Data Types and Variables

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

unsigned
Both of the above
None of these
signed

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Data Types and Variables
What will be the output for the below code ?1. public class Test{2. public static void main(String[] args){3. byte i = 128;4. System.out.println(i);5. }6. }

None of these
Compilation fails with an error at line 3
0
Compilation fails with an error at line 4
128

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Data Types and Variables
Determine output:class A{ public static void main(String args[]){ int x; x = 10; if(x == 10){ int y = 20; System.out.print("x and y: "+ x + " " + y); y = x*2; } y = 100; System.out.print("x and y: " + x + " " + y); }}

10 20 10 10
Error
10 20 10 100
10 20 10 20

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

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Data Types and Variables
What is the output for the below code ?1. public class Test{2. public static void main(String[] args){3. int i = 010;4. int j = 07;5. System.out.println(i);6. System.out.println(j);7. }8. }

None of these
Compilation fails with an error at line 5
10 7
Compilation fails with an error at line 3
8 7

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Data Types and Variables
Determine output:public class Test{ int a = 10; public void method(int a){ a += 1; System.out.println(++a); } public static void main(String args[]){ Test t = new Test(); t.method(3); }}

12
11
None of these
5
4

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