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Interview experiences & questions tagged Design Patterns
Explain design patterns you have practically used in real projects, why you chose them, and the alternative approaches you considered.
Design and implement a real-world Notification Service similar to Klaviyo, focusing on clean class design and object-oriented principles.
Review and extend the Machine Coding solution implemented in Round 2: - Conduct a code walkthrough and live demo highlighting service classes, layering, design patterns, and exception handling. - Execute edge-case testing on live running code without throwing unhandled exceptions. - Implement additional strategies live and accommodate newly introduced requirements. - Sketch a UML class diagram detailing core classes, relationships, and design patterns utilized.
What are Singleton, Factory, Strategy, Observer, and Builder design patterns?
How does the Singleton design pattern ensure only one object is created?
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