Which cloud characteristic lets multiple customers share the same physical infrastructure while their data and applications remain logically isolated?
Show answer and explanation
Answer: B
Multi-tenancy is the principle that many customers run concurrently on the same physical hardware and platform software while each tenant's workloads and data stay logically separated, usually enforced through hypervisor isolation, network segmentation, and access controls. This sharing is what allows providers to reach the economies of scale the cloud price model depends on.
Elasticity addresses scaling, high availability addresses uptime, and serverless is an execution model, so none of them name the shared-hardware-with-isolation arrangement.
Why the other options are wrong
- A. Elasticity is dynamic scaling of capacity with demand; it does not describe tenants sharing physical infrastructure under isolation.
- C. High availability concerns keeping a service accessible through failures, not how multiple customers are separated on the same hardware.
- D. Serverless computing is a compute execution model where event-triggered code runs on a managed platform, not the isolation principle itself.