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4. Which object-oriented pattern would you use to implement a class that must be instantiated only once for the entire lifespan of a script?


Вариант ответа 1 - A) Model-view-controller

Вариант ответа 2 - B) Abstract factory

Вариант ответа 3 - C) Singleton

Вариант ответа 4 - D) Proxy

Вариант ответа 5 - E) State


Comments: The Singleton Pattern is handy whenever only one instance of a particular class can exist at any given time (and, yes, in case you’re wondering, you should expect the exam to test you on the basics of patterns, too).

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