Behavioral Design Patterns in C++ - Introduction-Template Method

The video tutorial explains the template method design pattern, which defines a blueprint for algorithms that can be customized by clients. It highlights the use of hooks for customization, compares it with the strategy pattern, and details its structure. The Hollywood principle is discussed, emphasizing the control the base class has over the algorithm. Guidelines for implementing the template method are provided, ensuring minimal operations need to be overridden by subclasses.

What is the primary purpose of the Template Method design pattern?

• To provide a complete algorithm that cannot be changed

• To define a blueprint for an algorithm that can be customized

• To create a fixed sequence of operations without variation

• To replace the need for any other design patterns

How does the Template Method pattern differ from the Strategy pattern?

• Template Method varies parts of an algorithm, while Strategy varies the entire algorithm

• Template Method varies the entire algorithm, while Strategy varies parts

• Strategy pattern is used for creating blueprints, Template Method is not

• Both patterns are identical in their approach to algorithm customization

In the Template Method pattern, what role does the abstract class play?

• It provides default implementations for all methods

• It defines the template method and declares primitive operations

• It implements all the operations of the algorithm

• It serves as a concrete class with no abstract methods

What is the Hollywood principle in the context of the Template Method pattern?

• A rule to avoid using abstract classes

• A principle that suggests the base class will call subclass methods

• A principle that suggests subclasses should call the base class

• A guideline to always call the base class methods

What is a best practice when implementing the Template Method pattern?

• Allow all operations to be overridden by subclasses

• Keep the number of operations that can be overridden to a minimum

• Ensure the template method itself is overridden

• Avoid using any abstract methods

What are hooks in the context of the Template Method pattern?

• Mandatory steps that must be implemented by subclasses

• Optional operations that can be overridden by subclasses

• Fixed operations that cannot be changed

• Operations that are always called by the base class

Why should the number of operations that can be overridden be kept to a minimum?

• To ensure all operations are overridden

• To make it easier for subclasses to implement them

• To prevent any customization by subclasses

• To allow maximum flexibility in the algorithm