Behavioral Design Patterns in C++ - Null Object Pattern

What is a primary benefit of using the Null Object pattern over traditional null checks?

• It makes the code run faster.

• It requires more memory allocation.

• It eliminates the need for conditional statements.

• It increases the complexity of the code.

In the implementation of the Null Object pattern, what is the role of the 'nullmutex' class?

• To replace the main thread.

• To handle all memory allocations.

• To inherit from the Lock policy and do nothing.

• To perform complex operations.

Why does the code still work in a multi-threaded application without applying any locks?

• Because the array is not being used.

• Because the main thread is paused indefinitely.

• Due to the use of a null pointer.

• Because of the sleep statement.

What issue arises when deciding between a null pointer and a null mutex?

• Neither option supports multi-threading.

• Both options require the same amount of memory.

• It is unclear which one to use in a single-threaded application.

• Both options are equally efficient.

What is a potential problem with deleting a null mutex instance?

• It might not have a destructor.

• It could cause a memory leak.

• It could be allocated on the stack.

• It might not be allocated on the heap.

How does converting the null mutex into a Singleton help?

• It simplifies memory allocation management.

• It requires more memory.

• It exposes the null mutex to users.

• It increases the complexity of the API.

What limitation does Visual Studio have regarding the Null Object pattern?

• It does not show inheritance relationships.

• It cannot compile the code.

• It does not support Singleton patterns.

• It cannot run multi-threaded applications.