1.8. Design Patterns

Try these first

1. 1.

   What is a design pattern?

   Hint

   Think about solutions that are not specific to one problem.

2. 2.

   Name one type of creational pattern.

   Hint

   These patterns deal with object creation.

3. 3.

   What are design patterns?

   • Reusable solutions to common design problems.
   • Random code samples.
   • Just theories with no practical application.

   Hint

   Think about why programmers favor patterns.

4. 4.

   True or False: The Singleton pattern allows multiple instances of a class.

   • True
   • False

   Hint

   Consider the meaning of 'singleton' in common language.

5. 5.

   Design a simple application using the Factory Method pattern. Outline what classes you would use and how they would interact.

   Hint

   Think about what characteristics they share.

6. 6.

   Create a scenario where the Observer pattern enhances the application. Describe the subject and observers.

   Hint

   Consider how various displays need to update independently without direct coupling.