Explanations “Top Java Quiz Questions”

What is the result of the code?

✅ A. Bird is flying
❌ B. Pelican is flying
❌ C. The code will not compile because of line 4
❌ D. The code will not compile because of line 5
❌ E. The code will not compile because of line 9

Explanation:
The code compiles and runs without issue, so options C, D, and E are incorrect. The trick here is that the method fly() is marked as private in the parent class Bird, which means it may only be hidden, not overridden. With hidden methods, the specific method used depends on where it is referenced. Since it is referenced within the Bird class, the method declared on line 2 was used, and option A is correct. Alternatively, if the method was referenced within the Pelican class, or if the method in the parent class was marked as protected and overridden in the subclass, then the method on line 9 would have been used.

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528 viewsJul 6, 2021 at 07:56

What is the result of the code?

✅ A. Bird is flying
❌ B. Pelican is flying
❌ C. The code will not compile because of line 4
❌ D. The code will not compile because of line 5
❌ E. The code will not compile because of line 9

Explanation:
The code compiles and runs without issue, so options C, D, and E are incorrect. The trick here is that the method fly() is marked as private in the parent class Bird, which means it may only be hidden, not overridden. With hidden methods, the specific method used depends on where it is referenced. Since it is referenced within the Bird class, the method declared on line 2 was used, and option A is correct. Alternatively, if the method was referenced within the Pelican class, or if the method in the parent class was marked as protected and overridden in the subclass, then the method on line 9 would have been used.

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