Java MCQ Quiz

Number of primitive data types in Java are?

• 8

• 7

• 6

• 9

What is the size of float and double in java?

• 32 and 64

• 64 and 64

• 32 and 32

• 64 and 32

Automatic type conversion is possible in which of the possible cases?

• Short to int

• Long to int

• Int to long

• Byte to int

Find the output of the following code: int Integer = 24; char String = 'I'; System.out.print(Integer); System.out.print(String);

• Throws exception

• I

• 24 I

• Compile error

Find the output of the following program: public class Solution{ public static void main(String[] args){ short x = 10; x = x * 5; System.out.print(x); }}

• 50

• 10

• Exception

• Compile error

Select the valid statement to declare and initialize an array.

• char[] ch = new char()

• char[] ch = new char[]

• char[] ch = new char[5]

• char[] ch = new char(5)

When an array is passed to a method, what does the method receive?

• Copy of first element

• Length of the array

• A copy of the array

• The reference of the array

Identify the correct restriction on static methods.

• They can only call other static methods.

• They must access only static data

• All of the above

• They cannot refer to this or super.

Identify what can directly access and change the value of the variable res.

• Only Solution class

• None

• Any class

• Any class that extends Solution

In which of the following is toString() method defined?

• None

• java.lang.String

• java.lang.Object

• java.lang.util