DATA TYPES AND VARIABLES QUIZ

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.$7); System.out.println(test.do); System.out.println(test._$); }}

7 9 0

Compile error - $7 is not valid identifier.

None of these

7 0 0

Compile error - do is not valid identifier.

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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

128

Compilation fails with an error at line 3

0

Compilation fails with an error at line 4

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

None of these

unsigned

signed

Both of the above

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Size of int in Java is

64 bit

Depends on execution environment

16 bit

32 bit

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What will be the output for the below code ?1. public class Test{2. int i=8;3. int j=9;4. public static void main(String[] args){5. add();6. }7. public static void add(){8. int k = i+j;9. System.out.println(k);10. }11. }

Compilation fails with an error at line 8

Compilation fails with an error at line 5

17

0

None of these

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Size of float and double in Java is

32 and 64

64 and 64

32 and 32

64 and 32

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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 20

10 20 10 10

10 20 10 100

Error

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

Prints false

Will not compile as boolean can never be static

Prints true

Will not compile as boolean is not initialized

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The smallest integer type is ......... and its size is ......... bits.

short, 16

short, 16

byte, 8

short, 8

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

A Java keyword

Same as value 1

A Boolean literal

Same as value 0

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