Which three methods, inserted individually at line 14, will correctly complete class Two?

class One {
 void foo() { }
}
class Two extends One {
 //insert method here
}
  1. int foo() { /* more code here */ }

  2. void foo() { /* more code here */ }

  3. public void foo() { /* more code here */ }

  4. private void foo() { /* more code here */ }

  5. protected void foo() { /* more code here */ }


Correct Option: B,C,E

AI Explanation

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

Option A) int foo() { /* more code here */ } This option is incorrect because it changes the return type of the method foo() from void to int, which is not compatible with the return type in the parent class.

Option B) void foo() { /* more code here */ } This option is correct because it overrides the foo() method in the parent class with the same return type (void). The method in the subclass can have additional code to extend the functionality.

Option C) public void foo() { /* more code here */ } This option is correct because it overrides the foo() method in the parent class with the same return type (void) and adds the public access modifier. The access modifier can be the same or more accessible than the method in the parent class.

Option D) private void foo() { /* more code here */ } This option is incorrect because it changes the access modifier of the method foo() from the default (package-private) to private. Subclasses cannot have greater restrictions on the access modifier than the parent class.

Option E) protected void foo() { /* more code here */ } This option is correct because it overrides the foo() method in the parent class with the same return type (void) and adds the protected access modifier. The access modifier can be the same or more accessible than the method in the parent class.

The correct answer is B, C, E. These options correctly complete class Two by overriding the foo() method from the parent class with the same return type (void) and adding the appropriate access modifiers.

Please select the most appropriate option.

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