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🚀 Java Interview Questions – Episode 13
💡 What is the Singleton pattern in Java?
The Singleton pattern is a creational design pattern that ensures a class has only one instance throughout the application — and provides a global point of access to it.
🔒 Why use it?
- Useful for shared resources (e.g., config manager, logger, connection pool)
- Prevents multiple instances from being created, saving memory and ensuring consistency
🛠️ How does it work?
- Private constructor to restrict instantiation
- Static field to hold the single instance
- Public static method to return the instance
💡 Use Singleton when you need one and only one instance — nothing more!