1. What is a Design Pattern. A design pattern is a proven, reusable solution to a commonly occurring software design problem. It represents best practices developed by experienced software developers to solve recurring problems in object‑oriented design. 2. What is builder design pattern ? . In builder design pattern we removed the logic related to object constructor from client code & abstract it in separate class. This pattern was introduced to solve some of the problems with factory design pattern when the object contains a lot of attributes . major issues with factory design pattern is when object contains a lot of attributes. Some of the parameters might be optional but in factory pattern. we are…