SOLID design principles help make software stable and flexible. In this course, you’ll learn about the five SOLID design principles for software development, which are Single Responsibility Principle, Open/Closed Principle, Liskov Substitution Principle, Interface Segregation Principle, and Dependency Inversion Principle. You’ll then explore the use of each of the five SOLID principles in code. Next, you’ll examine the behavior-driven development process, including its benefits, how to perform BDD using Cucumber, and how to integrate BDD into the Scrum process. Lastly, you’ll learn about the similarities and differences between test-driven development and behavior-driven development.