Explanations “Top Java Quiz Questions”

What is the output of the code?

❌ A. Orca diving
✅ B. The code will not compile because of line 2
❌ C. The code will not compile because of line 8
❌ D. The code will not compile because of line 9
❌ E. The output cannot be determined from the code provided

Explanation:
This may look like a complex question, but it is actually quite easy. Line 2 contains an invalid definition of an abstract method. Abstract methods cannot contain a body, so the code will not compile and option B is the correct answer. If the body {} was removed from line 2, the code would still not compile, although it would be line 8 that would throw the compilation error. Since dive() in Whale is abstract and Orca extends Whale, then it must implement an overridden version of dive(). The method on line 9 is an overloaded version of dive(), not an overridden version, so Orca is an invalid subclass and will not compile.

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474 viewsJun 29, 2021 at 08:48

What is the output of the code?

❌ A. Orca diving
✅ B. The code will not compile because of line 2
❌ C. The code will not compile because of line 8
❌ D. The code will not compile because of line 9
❌ E. The output cannot be determined from the code provided

Explanation:
This may look like a complex question, but it is actually quite easy. Line 2 contains an invalid definition of an abstract method. Abstract methods cannot contain a body, so the code will not compile and option B is the correct answer. If the body {} was removed from line 2, the code would still not compile, although it would be line 8 that would throw the compilation error. Since dive() in Whale is abstract and Orca extends Whale, then it must implement an overridden version of dive(). The method on line 9 is an overloaded version of dive(), not an overridden version, so Orca is an invalid subclass and will not compile.

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