Java SE 8 Programmer 1Z0–808 Practice Full Test 1

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Question : 30 of 84
 
Marks: +1, -0
Given
class Vehicle {
  int x;
  Vehicle() {
    this(10); // line n1
  }
  Vehicle(int x) {
    this.x = x;
  }
}

class Car extends Vehicle {
  int y;
  Car() {
    super();
    this(20); // line n2
  }
  Car(int y) {
    this.y = y;
  }
  public String toString()
  {
    return super.x + ":" + this.y;
  }
}

And given the code fragment:
Vehicle y = new Car(); System.out.println (y) ;
What is the result?
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