1.   By operating system, the resource management can be done via __________

2.   _________ computing refers to applications and services that run on a distributed network using virtualized resources.

3.   Which of the architectural layer is used as a backend in cloud computing

4.   _______ is a pay-as-you-go model matches resources to need on an ongoing basis.

5.   In UNIX, each process is identified by its __________