Java Data Types

Question 1

C

class Main { 
 public static void main(String args[]) { 
         int t; 
         System.out.println(t); 
    } 
}

• 0
• garbage value
• compiler error
• runtime error

Question 2

Predict the output of following Java program.

C

class Test { 
    public static void main(String[] args) { 
      for(int i = 0; 0; i++) 
      { 
          System.out.println(\"Hello\"); 
          break; 
      } 
    } 
} 

• Hello
• Empty Output
• Compiler error
• Runtime error

Question 3

Predict the output of the following program.

Java

 class Test
{
    public static void main(String[] args)
    {
        Double object = new Double(\"2.4\");
        int a = object.intValue();
        byte b = object.byteValue();
        float d = object.floatValue();
        double c = object.doubleValue();

        System.out.println(a + b + c + d );

    }
}

• 8
• 8.8
• 8.800000095367432

Question 4

Which of the following statements is/are TRUE regarding JAVA ? (a) Constants that cannot be changed are declared using the ‘static’ keyword. (b) A class can only inherit one class but can implement multiple interfaces.

• Only (a) is TRUE.
• Only (b) is TRUE.
• Both (a) and (b) are TRUE.
• Neither (a) nor (b) are TRUE.