Structural Design Patterns in Modern C++ - Pointer to IMPLementation (Plmpl) - Part II

The video tutorial explains the process of separating class attributes into a separate implementation class, Employeeimpl, to hide implementation details from clients. It covers forward declaration, class nesting, and the benefits of using a pointer to implementation for maintaining binary compatibility. The tutorial also discusses memory management using smart pointers and introduces the Bridge design pattern, highlighting its advantages in C++ programming.

What is the purpose of creating a separate class called Employeeimpl?

• To make the Employee class non-copyable

• To increase the size of the Employee class

• To implement the functionality of the Employee class

• To expose all class attributes to clients

Why is forward declaration used in the context of the Employeeimpl class?

• To increase the compilation time

• To hide the implementation details from clients

• To allow clients to modify the class

• To expose the class to all files

What is one advantage of using the Pimple idiom?

• It requires recompiling all dependent files

• It decreases binary compatibility

• It allows changes in implementation without affecting clients

• It makes the class larger

How does the Pimple idiom help in preserving binary compatibility?

• By changing the size of the Employee class

• By ensuring clients depend on the implementation class

• By keeping the size of the Employee class constant

• By exposing all attributes to clients

What is a potential downside of using a unique pointer in the Employee class?

• It makes the class non-copyable

• It increases memory usage

• It exposes the implementation details

• It decreases performance

Why might a smart pointer be preferred over a raw pointer?

• To expose the implementation details

• To make the class non-copyable

• To automatically manage memory and avoid leaks

• To increase the complexity of the code

What design pattern is the Pimple idiom an implementation of?

• Observer

• Singleton

• Factory

• Bridge