Page 169 - Cloud Essentials

consulted to evaluate cloud solutions, but the IT department would not

procure the cloud solution. Computing infrastructure such as storage
capacity can be increased in a cloud, but it is the IT capabilities
(beyond just capacity) that make cloud solutions so compelling.

2. It is easy to exchange small text messages through Twitter. What is this
an example of?

A. IaaS
B. PaaS

C. SaaS
D. None of the above

C. Software as a Service is defined as productivity software, such
as email or word processing or, in this case, Twitter, that is delivered
over a network and available any time using any device.
A, B, and D are incorrect. Infrastructure as a Service is rapidly
scalable; it makes virtual servers, storage, backup, and similar

computing infrastructure available over a network. Platform as a
Service is used by developers; virtual machines, databases, and
reusable software libraries make software development and testing
quick and efficient.

3. Which of the following statements best defines virtualization?

A. Virtualization is a method to organize servers in a more efficient
manner.

B. Virtualization is a set of techniques for hiding software resources
behind hardware abstractions.
C. Virtualization is a method to structure data in a more efficient
manner.

D. Virtualization is a set of techniques for hiding hardware resources
behind software abstractions.

D. Virtualization masks hardware resources so that each running

virtual machine appears to have its own hardware.
A, B, and C are incorrect. Organizing servers and data do not
define the purpose of virtualization; they are both possible without
virtualization. Virtualization hides hardware resources behind software
abstractions, not the other way around.

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