Concerning building applications, it's essential to understand the distinct roles of HLD and detailed design. Top-level design provides a larger view of the application , illustrating the major parts and their relationships excluding granular implementation specifics. Conversely , LLD descends into

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