1z0-808 Exam - Question 182

Question

Given the definitions of the Bird class and the Peacock class: and the code fragment:Which code snippet can be inserted to print Fly. Dance. ?

Examice · Accepted Answer

To achieve the desired output where both methods from the Bird and Peacock classes are invoked correctly, the object must first be created as a Peacock to ensure that its methods are available. Then, it is cast back to a Peacock to allow direct method calls specific to the Peacock class. Hence, the correct code snippet is: Bird b = new Peacock(); Peacock p = (Peacock) b; This allows p to access both the fly() method from Bird and the dance() method from Peacock, resulting in the output 'Fly.Dance.'.

alex_au · Answer

Correct answer is D. For option B there is ClassCastException as class Bird cannot be casted to class Peacock

UAK94 · Answer

Answer is D.
class Bird{
	
	public void fly() {
		System.out.println("fly");
	}
	
}

public class Peacock extends Bird {
	
	public void dance() {
		System.out.println("dance");
	}
	
	public static void main(String[] args) {
		
		Bird b= new Peacock();
		Peacock p= (Peacock) b;
		
		// Bird b= new Bird();
		// Peacock p= (Peacock) b; // ClassCastException
		
		p.fly();
		p.dance();

}

carloswork · Answer

Tested. Answer is D.

To test:

class Bird {
	public void fly() {
		System.out.print("Fly.");
	}
}

class Peacock extends Bird {
	public void dance() {
		System.out.print("Dance.");
	}
}

public class Test {

public static void main(String[] args) {

Bird b = new Peacock (); Peacock p = (Peacock) b;
		
		p.fly();
		p.dance();

}
	
}

amigo31 · Answer

I tested it. For B option is taken cast exception. D option worked correctly..

Drift_King · Answer

Tested. Answer is - D. Bird b = new Peacock (); Peacock p = (Peacock) b;

iSnover · Answer

The correct answer is the letter B, you need to create an object B and then do a casting for it, making the same be able to access the method of the child class.

7df49fb · Answer

only D

BelloMio · Answer

It's not B because
with Bird B = new Bird()
and peacock p = (peacock) B; it's as if this becomes peacock p = new bird(); which is wrong

1z0-808 Exam - Question 182

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