Java OCA OCP Practice Question 1217

Question

What is the output of the following application? 

package mypkg; /*from  w w w .  j  av  a 2 s  . co  m*/
public class Main { 
        public static int wag = 5;   // q1 
        public void Main(int wag) { // q2 
           this.wag = wag; 
        } 
        public static void main(String[] tail) { 
           System.out.print(new Main(2).wag); // q3 
        } 
}
  • A. 2
  • B. It does not compile because of line q1.
  • C. It does not compile because of line q2.
  • D. It does not compile because of line q3. 


D.

Note

The Main class does not declare a constructor, so the default no-argument constructor is automatically inserted by the compiler.

What looks like a constructor in the class is actually a method that has a return type of void.

Therefore, the line in the main() method to create the new Main(2) object does not compile, since there is no constructor capable of taking an int value, making Option D the correct answer.




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