Explanations “Top Java Quiz Questions”

Which statement about the program is correct?

❌ A. It compiles without issue
❌ B. The code will produce a ClassCastException if called at runtime
❌ C. The code will not compile because of line 2
❌ D. The code will not compile because of line 5
✅ E. The code will not compile because of line 8
❌ F. The code will not compile because of line 10

Explanation:
First, the declarations of HasExoskeleton and Insect are correct and do not contain any errors, making options C and D incorrect. The concrete class Beetle extends Insect and inherits two abstract methods, getNumberOfSections() and getNumberOfLegs(). The Beetle class includes an overloaded version of getNumberOfSections() that takes an int value. The method declaration is valid, making option F incorrect, although it does not satisfy the abstract method requirement. For this reason, only one of the two abstract methods is properly overridden. The Beetle class therefore does not compile, and option E is correct. Since the code fails to compile, options A and B are incorrect.

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816 viewsMay 26, 2022 at 08:31

Which statement about the program is correct?

❌ A. It compiles without issue
❌ B. The code will produce a ClassCastException if called at runtime
❌ C. The code will not compile because of line 2
❌ D. The code will not compile because of line 5
✅ E. The code will not compile because of line 8
❌ F. The code will not compile because of line 10

Explanation:
First, the declarations of HasExoskeleton and Insect are correct and do not contain any errors, making options C and D incorrect. The concrete class Beetle extends Insect and inherits two abstract methods, getNumberOfSections() and getNumberOfLegs(). The Beetle class includes an overloaded version of getNumberOfSections() that takes an int value. The method declaration is valid, making option F incorrect, although it does not satisfy the abstract method requirement. For this reason, only one of the two abstract methods is properly overridden. The Beetle class therefore does not compile, and option E is correct. Since the code fails to compile, options A and B are incorrect.

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