#Scalability

Design a scalable distributed web crawler system. Discuss components like URL frontier, deduplication, parallel fetchers, rate-limiting, storage, indexing, fault tolerance, and scaling strategies.

Design a service to identify the n closest restaurants to a user in real time. Explain the system architecture, including geospatial indexing, caching strategies, and considerations for scaling to millions of users.

Explain how handling millions of transactions daily affects your thought process regarding frontend changes.

How do you approach designing a scalable microservices architecture? Discuss the key principles.

Describe how to achieve vertical order traversal of a binary tree. Include considerations for scalability and fault tolerance in your design.