How would you approach designing a backend system for a social media platform that requires real-time notifications and updates?

Hard difficulty

Hard questions require advanced understanding and critical thinking. Here, your problem-solving skills are key, as these questions often involve complex scenarios needing in-depth analysis and well-structured responses.

Problem solving question

Problem solving' questions are designed to test your analytical abilities and how you approach complex tasks. Demonstrate your logical thinking and creativity in crafting solutions to challenging issues.

Here's a hint

Focus on the technologies and design patterns you would use for real-time functionality, such as WebSockets or long polling. Mention scalability, databases, caching, and security measures.

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