Claim: Database caching allows flexibility in the processing of data improving scalability by distributing query workload from backend to multiple cheap front-end systems (part of an information system that is directly accessed and interacted with by the user to receive).
Evidence: Database caching improves scalability by distributing query workload from backend to multiple cheap front-end systems. It allows flexibility in the processing of data; for example, the data of Platinum customers can be cached while that of ordinary customers are not. A rule of thumb is that the client-side (or "front end") is any component manipulated by the user.