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Data Types and Variables

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

6
7
8
9

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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); }}

5
4
None of these
12
11

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Data Types and Variables
What will the output of the following program?public class Test{ public static void main(String args[]){ float f = (1 / 4) * 10; int i = Math.round(f); System.out.println(i); }}

2.5
25
0
3
2

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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
Will not compile as boolean is not initialized
Prints false

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

Both of the above
unsigned
None of these
signed

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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); }}

Exception is thrown at runtime
double
Compilation Error
float

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