Practice tests are essential to mastering any technology. They help us review topics thoroughly and understand the concepts clearly. In this article, we’ll focus on a Java Design Patterns Interview Questions Practice Test MCQs, including different question types like: Concept-based (testing our theory knowledge), Code-based (checking our coding skills), and Scenario-based (applying knowledge to real-world problems). Each question comes with detailed explanations for both correct and incorrect answers, so we will learn not just what’s right, but also why the other options are wrong. Sometimes, even incorrect answers teach us something useful! Let's go through Java Design Patterns Interview Questions Practice Test MCQs. Java Design Patterns Interview Questions Practice Test MCQs Q#1. (Scenario-Based Question, Single-Select) You have different types of notification systems (Email, SMS,