Behavioral Design Patterns in C++ - Basic Implementation-Memento

The video tutorial explains the Memento design pattern, focusing on how to store and restore an object's state without violating encapsulation. It introduces the Originator, Memento, and Caretaker classes, demonstrating their roles in managing state. The tutorial covers creating and using these classes, including methods for saving and restoring states. It also discusses enhancements like storing multiple states and the relationships between classes, providing a comprehensive understanding of the Memento pattern.

What is the primary role of the Originator class in the Memento design pattern?

• To manage multiple states

• To store and manage the state of an object

• To create and delete objects

• To handle user inputs

How does the Memento class help in maintaining encapsulation?

• By deleting the state

• By providing direct access to the state

• By modifying the state directly

• By storing the state externally

What is the purpose of the factory method in the Originator class?

• To delete the Memento

• To create and initialize a Memento

• To modify the state directly

• To print the state

What is the role of the Caretaker class in the Memento pattern?

• To create new Originators

• To store and manage Mementos

• To delete Mementos

• To modify the state of the Originator

How can multiple states be stored using the Caretaker class?

• By using a single Memento

• By using a vector or list of Mementos

• By modifying the Originator directly

• By using a single state variable

What is the main advantage of using the Memento pattern?

• It increases the speed of execution

• It externalizes the state without exposing it

• It allows for direct state modification

• It simplifies the code structure

In the Memento pattern, what is the relationship between the Originator and the Memento?

• The Originator creates and initializes the Memento

• The Memento modifies the Originator

• The Originator deletes the Memento

• The Memento creates the Originator