For a banking application, choose a CP system; financial data accuracy is paramount. For a social media feed, choose an AP system; it is better to show an outdated post than to crash the entire application for the user. Explicitly stating these trade-offs out loud instantly signals senior-level engineering maturity to your interviewer. How to Prepare for the Interview
“If you’re reading this, you’ve already done the work. The interview isn’t a test of your system. It’s a test of your story. Tell them a good one. – S.B.” Hacking The System Design Interview Pdf
Many candidates search for a looking for a cheat sheet. While a reference document is incredibly useful for last-minute review, truly "hacking" this interview requires a systematic framework, a deep understanding of architectural trade-offs, and a structured communication strategy. For a banking application, choose a CP system;