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Inheritance in C++ MCQ question and answer with solution | C++ Programimg MCQs

Learn Inheritance in C++ MCQ Questions and answers with easy and logical explanations in C++ Programimg. Inheritance in C++ MCQ question provides all type of technical mcq questions which is important for technical exams, campus exams and other entrance examination. Page-3 section-1

21
What is the diamond problem in C++ inheritance?
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Answer & Solution
Answer: Option C
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22
In C++, which access specifier allows the members of a base class to be accessible in the derived class and its derived classes, but not from outside the class hierarchy?
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Answer & Solution
Answer: Option D
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23
What is the default access specifier for a base class when inheriting in C++?
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Answer & Solution
Answer: Option A
Solution:
The correct answer is A: private.
Let's break down why:

In C++, when you inherit a class without explicitly specifying an access specifier (like `public`, `private`, or `protected`), the default access specifier depends on how you inherit.

If you use the `class` keyword to derive a class, the default access specifier is private.
For example, if you write `class Derived : Base`, it's the same as writing `class Derived : private Base`.

If you use the `struct` keyword to derive a class, the default access specifier is public.

This means that if you don't write `public`, `protected`, or `private` before the base class name in the inheritance, the members of the base class become `private` in the derived class (when inheriting with `class`).

Therefore, the default access specifier is private.
24
In C++, what happens if a derived class inherits multiple base classes and each base class contains a member with the same name?
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Answer & Solution
Answer: Option B
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25
Which keyword is used to prevent a class from being inherited in C++?
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Answer & Solution
Answer: Option A
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26
In C++, what is the process of creating a new class using an existing class as a blueprint and adding new functionalities to it?
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Answer & Solution
Answer: Option C
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27
What is the term used to describe a class that inherits from another class in C++?
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Answer & Solution
Answer: Option D
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28
In C++, what happens if a derived class redefines a method that is already defined in its base class?
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Answer & Solution
Answer: Option C
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29
In C++, which type of inheritance involves a class inheriting from multiple classes directly or indirectly?
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Answer & Solution
Answer: Option B
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30
What is the name given to the process of creating a new class by inheriting properties and behaviors from an existing class in C++?
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Answer & Solution
Answer: Option C
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