Iterator, Interpreter, and Memento are important Behavioral Design Patterns in Java. These patterns are frequently asked in interviews because they solve problems related to sequential traversal, language grammar interpretation, and object state restoration. Q1. What is the primary purpose of the Iterator Pattern in an object-oriented...

Command, State, and Visitor are important Behavioral Design Patterns in Java. These patterns are frequently asked in interviews because they solve problems related to request encapsulation, state-based behaviour changes, and adding operations without modifying classes. Q1. What is the primary purpose of the Command Pattern? Options: A)...

Observer and Strategy are important Behavioral Design Patterns in Java. These patterns are frequently asked in interviews because they solve problems related to event notifications, dynamic behaviour switching, and clean software architecture. Q1. Which of the following best describes the primary purpose of the Observer Pattern? Options:...

Template Method, Mediator, and Chain of Responsibility are important Behavioral Design Patterns in Java. These patterns are frequently asked in interviews because they help organize workflows, reduce object coupling, and manage request processing efficiently. Q1. In a mobile payment app, the user can select different payment processors...

Facade, Bridge, and Decorator are important Structural Design Patterns in Java. These patterns are commonly asked in interviews because they help simplify complex systems, separate abstraction from implementation, and add behaviour dynamically at runtime. Q1. What is the primary purpose of the Facade Pattern? Options: A) To reduce the...