"I am choosing a NoSQL database like Cassandra. The trade-off is that I lose complex JOIN queries (SQL flexibility) in exchange for linear horizontal scalability. Given our requirement of 1 billion writes per day, scalability is more critical than complex relational queries."
Solves the common engineering pitfall of "silent problem solving" by teaching candidates to actively articulate assumptions and trade-offs in real-time. 🏗️ Real-World System Case Studies System Design Interview Fundamentals Rylan Liu Pdf
Rylan Liu emphasizes that complex systems are just clever arrangements of simple building blocks. If you don't know these cold, you will panic. "I am choosing a NoSQL database like Cassandra