Structural Design Patterns : Adapter, Bridge, Decorator & More for Interviews | Low Level Design

Unlock the power of structural design patterns in software engineering with this detailed tutorial! Perfect for learners and interview candidates, this video explains each major structural pattern, their real-world applications, and practical code examples to help you ace your next technical interview.

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What Are Structural Design Patterns?
Structural design patterns focus on how classes and objects are composed to form larger structures. They help you write code that is flexible, reusable, and easily maintainable by organizing relationships among different components. These patterns allow you to simplify complex architectures, boost modularity, and minimize code duplication.

Patterns Covered in This Video
Adapter Pattern: Allows incompatible interfaces to work together. It acts as a translator between two different systems—think of charging your phone with a travel adapter in a foreign country. Learn how to implement the Adapter pattern to integrate third-party libraries, legacy code, or APIs seamlessly in your applications. ([21-Structural-Adapter-Pattern.md])

Bridge Pattern: Separates abstraction from implementation so both can evolve independently. For example, decouple a remote control from different types of devices. Discover how the Bridge pattern helps you manage codebases with rapidly changing requirements or multiple variations of functionality. ([22-Structural-Bridge-Pattern.md])

Composite Pattern: Lets you treat individual objects and compositions of objects uniformly. Think of how directories and files operate in a file system. Learn to apply the Composite pattern to build tree-like structures for GUIs, file explorers, and organizational hierarchies. ([23-Structural-Composite-Pattern.md])

Decorator Pattern: Dynamically adds behavior to objects without altering their structure. Imagine adding toppings to a pizza or new features to a notification service at runtime. The Decorator pattern is essential for extending functionality elegantly. ([24-Structural-Decorator-Pattern.md])

Facade Pattern: Provides a simplified interface to a complex subsystem. Use Facade to integrate multiple modules behind a single, user-friendly API. This pattern is ideal for reducing onboarding time and decoupling client code from implementation details. ([25-Structural-Facade-Pattern.md])

Flyweight Pattern: Minimizes memory usage by sharing common object data instead of duplicating it. Think of characters in a text editor or game element sprites. The Flyweight pattern is crucial for optimizing applications with large numbers of similar objects. ([26-Structural-Flyweight-Pattern.md])

Proxy Pattern: Controls access to another object. Proxies are invaluable for implementing lazy initialization, access control, logging, and remote procedure calls. Learn when to use virtual, protection, or remote proxies in your system’s architecture. ([27-Structural-Proxy-Pattern.md])

Why Are These Patterns Important?
Reduce code duplication and promote reusability

Enhance scalability and maintainability of your architecture

Abstract complexity for easier onboarding and testing

Prepare for technical interviews with proven, pattern-driven answers

Enable cleaner integration with APIs, third-party libraries, and legacy systems

Keywords for Ranking
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Elevate your system architecture knowledge and become interview-ready—watch now!