R Systems International Senior Project Leader Interview Questions and Answers for Experienced

Singleton design pattern ensures that a class has only one instance and provides a global point of access to it.

• Singleton pattern restricts the instantiation of a class to a single object.

• It is useful when only one instance of a class is needed to control actions throughout the system.

• The singleton class provides a way to access its unique instance globally.

• The instance is created only if it doesn't exist, otherwise, i...read more