Think of a REST API like a waiter in a restaurant. You (an app) tell the waiter what you want (your request), and the waiter goes to the kitchen (the server) to get it for you. REST is just a set of ...
Let's face it, software isn't perfect. No matter how reliably a product is built, or how thoroughly it is tested, it will still glitch or crash at one point or another. Defects are simply a fact of ...