Which cloud computing concept BEST describes the ability of a single cloud application instance to serve multiple customers while ensuring each customer's data remains isolated and secure from every other customer?
Load balancing
Elasticity
Resource pooling
Multitenancy
Multitenancy is the correct answer because it refers to a software or infrastructure architecture in which multiple tenants share the same underlying resources and even the same application instance, yet each tenant's data and configurations are logically separated. This provides both cost efficiency and strict data isolation. Resource pooling concerns the provider's ability to pool and dynamically allocate hardware resources, elasticity refers to rapid scaling of resources, and load balancing distributes traffic across resources; none of these alone guarantee per-tenant data isolation within the same application instance.
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