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Data Types and Variables

Data Types and Variables
Which of the following automatic type conversion will be possible?

long to int
byte to int
short to int
int to long

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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 false
Prints true
Will not compile as boolean is not initialized

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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 20
10 20 10 100
Error
10 20 10 10

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Data Types and Variables
Determine output:public class Test { static void test(float x){ System.out.print("float"); } static void test(double x){ System.out.print("double"); } public static void main(String[] args){ test(99.9); }}

float
double
Compilation Error
Exception is thrown at runtime

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Data Types and Variables
What would be the output of the following fraction of code ?int Integer = 34 ;char String = 'S' ;System.out.print( Integer ) ;System.out.print( String ) ;

34
Throws exception.
34 S
Does not compile as Integer and String are API class names.
S

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Data Types and Variables
Java is a ........... language.

weakly typed
None of these
strongly typed
moderate typed

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