The ultimate guide to coding interviews: Learn and practice JavaScript design patterns tested by FAANG engineers. Get interview-ready in just a few hours with battle-tested solutions.

If you're an experienced developer, chances are your interviewer won't ask you about language syntax. Instead, they'll focus on things that test your understanding of software architecture, and how capable you are at finding optimized solutions to given problems. 

That’s where a strong understanding of design patterns comes in handy. It's often useful to be able to draw on established patterns instead of reinventing the wheel.

In this course, you will learn how to effectively deploy design patterns to answer interview questions. The course is divided into four sections: Creational Patterns, Structural Patterns, Behavioral Patterns, and Architectural Patterns. Each section has its own set of design patterns which you’ll learn to use through various challenges. 

Every challenge contains a detailed solution explanation. By the end of this course (and with some practice), you will be able to confidently use design patterns to tackle advanced coding interview questions in JavaScript.

JavaScript Design Patterns for Coding Interviews

## Definition

As developers, we want to write code that is efficient, reusable, and maintainable. Similarly, as JavaScript developers, you can end up writing code for large applications. Hence, the code structure becomes important. While developing, you may also find yourself writing similar code for separate problems. In such scenarios, it’ll be helpful to have a structure that could be used to solve various common issues. This is where **design patterns** come into play.


**Design patterns** are solutions to commonly-occurring problems in software design, such as writing JavaScript web applications. They can also be considered as templates that can be used to solve various issues in different situations.

# Definition

As developers, we want to write code that is efficient, reusable, and maintainable. Similarly, as JavaScript developers, you can end up writing code for large applications. Hence, the code structure becomes important. While developing, you may also find yourself writing similar code for separate problems. In such scenarios, it’ll be helpful to have a structure that could be used to solve various common issues. This is where **design patterns** come into play.


**Design patterns** are solutions to commonly-occurring problems in software design, such as writing JavaScript web applications. They can also be considered as templates that can be used to solve various issues in different situations.

This lesson introduces design patterns, the definition, their uses, advantages, and a few drawbacks.

Before We Begin

Introduction To Design Patterns

Creational Patterns

Structural Patterns

Behavioral Patterns

Architectural Patterns

Conclusion

What Are Design Patterns?

Definition