Creational Design Patterns in Modern C++ - Destruction Policies

The video tutorial discusses the importance of properly managing the destruction of a logger instance in C++. It explains why calling delete on a logger instance is not always necessary and how smart pointers can be used to manage memory automatically. The tutorial also covers the use of custom deleters and the at exit function to ensure proper cleanup. Additionally, it warns about potential issues with static initialization and the importance of avoiding memory leaks.

Why might it be unnecessary to manually delete a logger instance in a Singleton pattern?

• The logger instance is not important for the application.

• The logger instance is only used in a single part of the application.

• The logger instance is not used throughout the program.

• The logger instance is automatically destroyed when the program ends.

What is the primary advantage of using a unique pointer for managing a Singleton instance?

• It requires manual deletion of the instance.

• It automatically deletes the instance when the program terminates.

• It prevents the instance from being used in multiple parts of the application.

• It allows multiple instances of the Singleton.

How can you prevent users from accidentally deleting a logger instance managed by a smart pointer?

• By not using a smart pointer at all.

• By using a shared pointer instead.

• By making the destructor public.

• By making the destructor private.

What is the role of a custom deleter in managing a Singleton instance?

• It provides access to private members of the class.

• It allows the destructor to be called multiple times.

• It ensures the instance is never created.

• It prevents the instance from being deleted.

What does the at-exit function do in the context of Singleton destruction?

• It creates a new instance of the Singleton.

• It registers a callback to be invoked after main returns.

• It registers a callback to be invoked before main starts.

• It prevents the program from terminating.

What is a potential risk when using global or static objects with Singleton instances?

• The Singleton instance may be destroyed too early.

• The Singleton instance may be destroyed multiple times.

• The Singleton instance may be destroyed too late.

• The Singleton instance may never be destroyed.

What is the static initialization fiasco in C++?

• A situation where static objects are initialized too late.

• A situation where static objects are initialized multiple times.

• A situation where static objects are never initialized.

• A situation where static objects are initialized in the wrong order.