Data types and type conversions

Which is not a primitive data type?

• Boolean

• Character

• Arrays

• Integer

What is the default value of boolean?

• true

• false

• '1'

• '0'

What is the output of this program?

public class TestMain {

public static void main(String[] args) {

int abc;

System.out.println(abc+" default value");

}

}

• 0 default value

• Compile time error - Local variable may not have been initialized

• Run time error - Local variable may not have been initialized

• None of Above

What is the output of this program?

public class TestMain {

          static int abc;

          public static void main(String[] args) {

                   System.out.println(abc+" default value");

          }}

• 0 default value

• Compile time error - Class variable may not have been initialized

• Run time error - Class variable may not have been initialized

• None of Above

Which of the following can be a valid value for a char data type?

• "A"

• 'A'

• 65

• Both b and c

Which of the following is not a primitive data type in Java?

• float

• void

• char

• short

Which data type would be most suitable for storing the price of an item in a store?

• int

• double

• boolean

• char

Which of the following is the smallest primitive data type in Java?

• short

• int

• byte

• long

Which of these is necessary condition for automatic type conversion in Java?

• The destination type is smaller than source type

• The destination type is larger than source type

• The destination type can be larger or smaller than source type

• None of the mentioned

If an expression contains double, int, float, long, then the whole expression will be promoted into which of these data types?

• long

• int

• double

• float