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Singleton Design Pattern
Last Updated: February 21, 2026
Ashish Pratap Singh
High Priority
5 min read
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1. What is Singleton Pattern?
2. Class Diagram
3. How It Works
4. Implementation
1. Lazy Initialization (Not Thread-Safe)
2. Thread-Safe Singleton
3. Double-Checked Locking
4. Eager Initialization
5. Language Specific Implementations
5. Practical Example: In-Memory Cache Manager
6. Pros and Cons of Singleton Pattern
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Intro to Design Patt...
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Exercise: Singleton
