Structural Design Patterns in Modern C++ - Pros and Cons - Proxy Design Pattern

The video tutorial explains the Proxy design pattern, which provides a layer of indirection to manage access to a real subject. It covers different types of proxies: virtual, protection, remote, and smart pointer. Each type serves a specific purpose, such as creating expensive objects on demand, restricting access, simplifying client implementation, and managing memory. The tutorial also discusses the advantages and disadvantages of using the proxy pattern, including its ability to add behavior at compile time and the tight coupling it creates. Guidelines for when to use the proxy pattern are provided.

What is the primary purpose of a virtual proxy?

• To manage memory automatically

• To simplify client implementation

• To load expensive objects only when needed

• To restrict access to certain resources

How does a protection proxy function?

• It restricts access to the real object

• It simplifies client implementation

• It loads objects on demand

• It manages memory for the user

What is the main advantage of using a remote proxy?

• It simplifies the client's implementation by handling remote components

• It restricts access to certain resources

• It manages memory automatically

• It provides a layer of indirection

What is a key feature of a smart pointer?

• It simplifies client implementation

• It loads objects on demand

• It manages memory automatically

• It restricts access to the real object

What is a disadvantage of the proxy pattern?

• It hides the location of the real subject

• It can only add one new behavior at runtime

• It creates a loose coupling between proxy and real subject

• It can only add one new behavior at compile time