Design Patterns Quiz

Which of the following best describes the Adapter Design Pattern?

• Converts a class into an interface

• Acts as a bridge between two incompatible interfaces

• Changes the functionality of an existing class

• Directly inherits from two unrelated classes

In the Adapter Design Pattern, the component that the client expects to interact with is known as:

• Adaptee

• Adapter

• Client

• Target Interface

Which real-world analogy best fits the Adapter Design Pattern?

• A password-protected door

• A translator at a UN conference

• A traffic signal system

• A personal diary lock

The Proxy Design Pattern primarily deals with:

• Speeding up the network connection

• Providing a placeholder to control access

• Replacing a class hierarchy

• Converting one data format to another

In the Proxy Pattern, the actual object which performs the real work is called:

• RealSubject

• Subject

• Proxy

• Handler

Which of these is NOT a component in the Adapter Design Pattern?

• Client

• Proxy

• Target Interface

• Adaptee

In chaining proxies, each proxy:

• Ignores the request and forwards it

• Adds behavior or checks before forwarding

• Acts as the final object always

• Removes all intermediate checks

The Adapter Design Pattern helps classes with:

• Similar interfaces

• Compatible methods

• Incompatible interfaces

• Identical signatures

Which of these is NOT a reason to use a Proxy Design Pattern?

• Access control

• Logging

• Data conversion between formats

• Lazy initialization

When a proxy is used as a placeholder, it is responsible for:

• Creating a new class hierarchy

• Blocking access permanently

• Managing access to the RealSubject

• Adapting incompatible interfaces