NetworkingHard#161Explain the workings of the TCP protocol for a low-latency network.Focus on the three-way handshake, congestion control (like TCP Fast Open, and CUBIC), and optimizing for reduced latency.
Data StructuresHard#162Design and implement a concurrent hash map.Implement with fine-grained locking or lock-free techniques to ensure thread safety and high concurrency.
AlgorithmsHard#163Find the Kth largest element in a stream of numbers.Utilize a min-heap to keep track of the K largest elements, ensuring efficient insertion and extraction.
AlgorithmsHard#164Implement Google's PageRank algorithm.Use graph-based algorithms focusing on eigenvector calculation and iterative approaches.
System DesignHard#165Design an API rate limiter for a web service.Use token bucket or leaky bucket algorithms, consider distributed storage for scalability.
Database SystemsHard#166Optimize database queries for a high-traffic website.Focus on indexing, query optimization, using caching, database sharding, and efficient schema design.
SecurityHard#167Create a secure and scalable authentication system for a web application.Implement OAuth for third-party integrations, use JWT for stateless authentication, and ensure protection against common security vulnerabilities.
Database SystemsHard#168Design a system for efficient storage and retrieval of large-scale time-series data.Optimize for write-heavy loads, use time-based partitioning, efficient indexing, and consider data compression techniques.
Distributed SystemsHard#169Explain how a blockchain works and how to implement one.Focus on cryptographic hashing, decentralized consensus algorithms (like Proof of Work), and the maintenance of a distributed ledger.
System DesignHard#170Design an efficient parking lot management system.Use object-oriented design principles, focus on efficiently handling different vehicle sizes, and optimizing space usage.