Question
upstudy study bank question image url

\begin{tabular}{l} Concrete classes that inherit virtual functions \\ but do not override their implementations: \\ Have vtables which are the same as those of their \\ base classes. \\ Receive their own copies of the virtual functions. \\ Receive pointers to their base classes' virtual \\ functions. \\ Receive pointers to pure virtual functions. \\ \hline\end{tabular}

Ask by Young Vaughan. in the United States
Mar 14,2025

Upstudy AI Solution

Tutor-Verified Answer

Answer

Concrete classes that inherit virtual functions without overriding them have the same vtables as their base classes.

Solution

Sign in to Unlock Answers for Free!

A Learning Platform Trusted by Millions of Real Students and Teachers.

star-icon Unlock

Answered by UpStudy AI and reviewed by a Professional Tutor

The Deep Dive

When it comes to inheritance in C++, if a concrete class inherits virtual functions without overriding them, it retains the vtable of its base class. This means that it can use the behavior defined in the base class directly, keeping things simple and efficient. No additional overhead is added for the vtable since it points to the base class implementations. However, it's important to note that if a derived class overrides a virtual function, it creates a new entry in its vtable, controlling how that function behaves. This can lead to some common mistakes, such as forgetting to override a function that’s meant to be specialized, leading to unexpected behavior or using the base class implementation unintentionally. Always check your intention when designing your class hierarchy!

Try Premium now!
Try Premium and ask Thoth AI unlimited math questions now!
Maybe later Go Premium
Study can be a real struggle
Why not UpStudy it?
Select your plan below
Premium

You can enjoy

Start now
  • Step-by-step explanations
  • 24/7 expert live tutors
  • Unlimited number of questions
  • No interruptions
  • Full access to Answer and Solution
  • Full Access to PDF Chat, UpStudy Chat, Browsing Chat
Basic

Totally free but limited

  • Limited Solution
Welcome to UpStudy!
Please sign in to continue the Thoth AI Chat journey
Continue with Email
Or continue with
By clicking “Sign in”, you agree to our Terms of Use & Privacy Policy