When creating applications, it's vital to comprehend the contrasting roles of high-level design and LLD . High-level design provides a larger perspective of the system , outlining the major parts and their relationships without detailed realization specifics. In contrast , LLD delves into the engine

Even in a UPI-heavy economy, almost every billing counter in India still keeps a physical cash drawer under the counter, from kirana stores to pharmacies and restaurants. Card and QR payments have not removed cash, they have just made the drawer less busy. A proper cash drawer beats a loose box beca