Practice Real-world Examples Of Design Patterns (27.6)

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9 questions

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6 sample questions

Question 1.
What is the purpose of the Singleton Pattern?
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Think about when you need a single point of control.
Question 2.
How does the Observer Pattern function?
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Consider situations where one action affects multiple listeners.
3Question 3.
What does the Singleton Pattern ensure?
- Multiple instances of a class
- Only one instance of a class
- No instances of a class
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Think about a logging service that should only have one instance.
4Question 4.
The Observer Pattern is primarily used for what?
- True
- False
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Remember how alerts are sent to multiple listeners.
Question 5.
Design a basic logging system in code, ensuring it uses the Singleton Pattern. Provide methods for logging at different severity levels.
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Think about how to enforce the single instance control.
Question 6.
Implement a simple UI with components that use the Observer and Composite patterns. How will state changes be reflected in observers?
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Consider the update mechanism for notifying observers.

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