Which pattern prevents one from creating more than one instance of a variable?
A. Factory Method
B. Singleton
C. Observer
D. None of the mentioned
Answer:A
Which pattern prevents one from creating more than one instance of a variable?
A. Factory Method B. Singleton C. Observer D. None of the mentioned
Explanation:In singleton pattern, the class itself is made responsible for keeping track of its instance.Thus it ensures that no more than one instance is created.