What makes services visible and accessible to the users?

An application developer is exploring the best technology to have the application easily transportable and have a small image footprint. Which technology satisfies the request?

Which cloud service model allows the deployment of consumer-created applications on the provider's infrastructure?

Which method of storage redundancy protects against drive failure?

Which type of file system can be mounted on multiple compute systems running a hypervisor to access the same file system simultaneously?