One of the best ways to become an expert in any subject is by practicing it in a regular interval. There are many ways to practice the subject. It totally depends on you. In my opinion, solving the practice test is the most prominent way to refresh your concept without going through the theory & concepts again. When you start solving the practice test, all your old concepts gets recalled. In this article, we will explore SOLID Principles Practice Test in the form of MCQs, including a mix of concept-based, code-based, and scenario-based questions. After each question, we will go over the explanation for why each option is right or wrong. Don’t overlook the incorrect options, as they might recap other