Multiple choice .net c-sharp

The code public class B : A { }

  1. Defines a class that inherits all the methods of A

  2. Defines a class that inherits the public and protected methods of A only

  3. Errors

  4. a and b
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In C#, the colon syntax denotes inheritance. While a child class technically 'inherits' all members, it can only access public and protected members of the base class. Private members are inherited but remain inaccessible to the child class. Option 2784 is technically true in a structural sense, but 2785 is the standard academic answer regarding accessibility.

AI explanation

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

Option A) Defines a class that inherits all the methods of A - This option is incorrect because it states that class B inherits all the methods of A. However, without any additional information, we cannot determine if class B indeed inherits all the methods of class A.

Option B) Defines a class that inherits the public and protected methods of A only - This option is correct. In C#, when a class is derived from another class (using the colon syntax), it inherits the public and protected members of the base class. In this case, class B inherits the public and protected methods of class A.

Option C) Errors - This option is incorrect because there is no apparent error in the given code. It is a valid class definition.

Option D) a and b - This option is incorrect because only option B is correct. Option A is incorrect because it assumes that class B inherits all the methods of class A, which is not necessarily true.

The correct answer is B) Defines a class that inherits the public and protected methods of A only. This option is correct because when a class is derived from another class in C#, it inherits the public and protected members of the base class.

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