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Data Types and Variables

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

9
7
6
8

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Data Types and Variables
In Java, the word true is ................

A Boolean literal
Same as value 0
A Java keyword
Same as value 1

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

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Data Types and Variables
Size of float and double in Java is

64 and 32
32 and 64
32 and 32
64 and 64

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

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

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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 ) ; }}

Throws Exception
20
22
Compilation Error
21

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