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

The video tutorial explains the visitor design pattern, starting with the creation of base and concrete elements. It demonstrates how to access operations without the visitor pattern and then introduces the visitor pattern to add new operations without modifying existing classes. The tutorial includes implementing the accept method and creating concrete visitors to operate on object structures. It concludes with a class diagram to illustrate the relationships between classes.

What is the purpose of creating a base class element in the initial setup?

• To store data for each element

• To define a common interface for all elements

• To manage memory allocation

• To handle user input

Why is the accept method added to the element class?

• To allow elements to accept user input

• To enable elements to accept visitors for operation

• To store data for each element

• To manage memory allocation

What is the role of the visitor class in the visitor pattern?

• To store data for each element

• To handle user input

• To provide visit methods for each element subclass

• To manage memory allocation

What is the main reason for having separate visit methods for each concrete element?

• To improve memory management

• To allow user interaction

• To identify the type of element being visited

• To reduce code complexity

How does the visitor pattern help in adding new operations to classes?

• By modifying existing classes

• By adding new methods to the base class

• By introducing new visitor classes

• By changing the class hierarchy

What is the benefit of using a visitor pattern over traditional method calls?

• It improves performance

• It allows adding new operations without modifying existing classes

• It simplifies the code structure

• It reduces the number of classes

In the visitor pattern, what is the significance of the object structure?

• It manages memory allocation

• It forms a collection of elements to apply operations

• It stores user data

• It handles user input