If developing applications, it's vital to understand the separate roles of HLD and LLD . High-level design provides a broader picture of the application , describing the major components and their interactions without granular realization specifics. On the other hand, Detailed design goes into the

Caching Strategies Start With One Question: How Stale Can This Data Be? Most caching answers jump straight to Redis. The stronger answer starts one step earlier. Caching is a deliberate trade of freshness for speed, so the first thing to establish is how much staleness the product can tolerate. A pr