C++ Standard Template Library in Practice - Shared Pointers

The video tutorial explains the use of smart pointers in C++, focusing on unique, shared, and weak pointers. Unique pointers ensure exclusive ownership of resources, while shared pointers allow multiple ownerships with automatic memory management. Weak pointers provide non-owning references to shared pointers, useful for checking object existence without affecting its lifetime. The tutorial includes practical examples demonstrating the creation, conversion, and usage of these pointers, highlighting the importance of reference counting and scope management.

What is the primary advantage of using a unique pointer?

• It allows multiple objects to share ownership of a resource.

• It ensures a resource is owned by only one object.

• It automatically increases the reference count.

• It can be easily converted to a weak pointer.

How is a shared pointer different from a unique pointer?

• A shared pointer cannot be copied.

• A shared pointer requires manual deletion.

• A shared pointer does not manage memory.

• A shared pointer can be passed by value.

Which function is used to create a shared pointer?

• new_shared

• create_shared

• make_shared

• make_unique

What is the role of a weak pointer in relation to a shared pointer?

• It converts a shared pointer to a unique pointer.

• It deletes the shared pointer when it goes out of scope.

• It holds a non-owning reference to the shared pointer.

• It increases the reference count of the shared pointer.

How can you convert a weak pointer to a shared pointer?

• By using the convert function.

• By directly assigning it to a shared pointer.

• By calling the lock member function.

• By using the make_shared function.

What happens to the reference count when a shared pointer is copied?

• It remains the same.

• It decreases by one.

• It increases by one.

• It resets to zero.

In the provided code example, what indicates that a pointer has expired?

• The lock function returns false.

• The lock function returns true.

• The pointer can still be accessed.

• The reference count is greater than zero.