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Design Patterns

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Question 1

Which of the following is a creational design pattern?

  • Observer

  • Strategy

  • Singleton

  • Command

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Question 2

 What does the Factory Method Pattern do?

  •  Shares data between classes

  • Notifies observers

  • Creates objects without specifying the exact class

  • Destroys objects safely

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Question 3

Which pattern provides a global point of access to a class instance?

  • Factory

  • Singleton

  • Adapter

  • Bridge

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Question 4

The observer Pattern defines which type of relationship?

  • One-to-many

  • Many-to-one

  • one-to-one

  • Many-to-Many

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Question 5

How does Singleton prevent multiple instances of a class?

  • By using a public constructor

  • By using private destructor

  • By making constructor private and using a static method to access instance

  • By using multiple constructors

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