Behavioral Design Patterns in C++ - Null Object Pattern

What is the purpose of the Null Object pattern in programming?

How does the Null Object pattern simplify code readability?

How does the implementation of the Null Object pattern affect multi-threaded applications?

What is the role of the sleep statement in the context of the discussed code?

What are the implications of passing a null pointer versus a null mutex in a single-threaded application?

What challenges arise when trying to delete a null mutex instance?

Explain the significance of using a Singleton for the null mutex.