Given: 11. class A { 12. public void process() { System.out.print("A,"); } 13. class B extends A { 14. public void process() throws IOException { 15. super.process(); 16. System.out.print("B,"); 17. throw new IOException(); 18. } 19. public static void main(String[] args) { 20. try { new B().process(); } 21. catch (IOException e) { System.out.println("Exception"); }} What is the result?

technology

  1. Exception

  2. A,B,Exception

  3. Compilation fails because of an error in line 20.

  4. Compilation fails because of an error in line 14.

  5. A NullPointerException is thrown at runtime

Show answer
Correct Option: D

AI Explanation

To answer this question, let's go through each option to understand why it is correct or incorrect:

Option A) Exception - This option is incorrect. Although an exception is thrown during the execution, it is caught and handled in the catch block, so it will not be printed as the final result.

Option B) A,B,Exception - This option is incorrect. The code will not reach the "B," part of the output because an exception is thrown before that.

Option C) Compilation fails because of an error in line 20 - This option is incorrect. There are no compilation errors in line 20.

Option D) Compilation fails because of an error in line 14 - This option is correct. The method process() in class B is declared to throw IOException, but the overridden method in class A does not throw any exceptions. This is not allowed because the overriding method cannot throw a broader or new checked exception. Therefore, the code will fail to compile due to an error in line 14.

Option E) A NullPointerException is thrown at runtime - This option is incorrect. There is no code in the given program that would cause a NullPointerException to be thrown.

The correct answer is D. Compilation fails because of an error in line 14. This option is correct because the code violates the rule of exception handling when overriding methods.

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