A cloud consumer is interested in leasing cloud-based virtual servers. It compares the
virtual servers offered by Cloud Provider X and Cloud Provider Y.
Cloud X (owned by Cloud Provider X) and Cloud Y (owned by Cloud Provider Y) both provide shared physical
servers that host multiple virtual servers for other cloud consumers.
The virtual servers on Cloud X are accessed directly, whereas the virtual servers on Cloud
Y are accessed via an automated scaling listener. On Cloud X, virtual servers are pre-
configured to support a specific amount of concurrent cloud service consumers. When this
threshold is exceeded, cloud service consumer requests are rejected. Due to the use of the
automated scaling listener, virtual servers on Cloud Y can provide a greater level of
elasticity.
The hourly cost to the cloud consumer to use a virtual server on Cloud X is half that of the
cost to use a virtual server on Cloud Y.
Within a one month period, Cloud Provider X bases its hourly charge on the maximum number of virtual servers used. Within a one month
period, Cloud Provider Y bases its hourly charges on actual virtual server usage. Cloud
Provider Y charges $20 for each hour that a cloud consumer uses a virtual server.

The cloud consumer predicts its monthly usage requirements to be as follows:

The cloud consumer is required choose the cloud provider with the lowest on-going cost
based on its predicted usage. Which of the following statements accurately calculates the
on-going usage costs of Cloud Providers X and Y and correctly states the cloud provider
that the cloud consumer must choose?

• A. The total usage duration is (10 + 20 + 70) hours = 100 hours.
  The actual usage is ((10 X 6) + (20 X 4) + (70 X 2)) x ((2 + 4 + 6) / 3) hours = 1,120 hours
  The cost of using virtual servers from Cloud Provider X is 6 X 100 X $10 = $6,000.
  The cost of using virtual servers from Cloud Provider Y is 1,120 X $20 = $22,400.
  The cloud consumer must therefore choose Cloud Provider Y.
• B. The total usage duration is (10 + 20 + 70) hours = 100 hours.
  The actual usage is ((10 X 6) + (20 X 4) + (70 X 2)) x ((2 + 4 + 6) / 3) hours = 1,120 hours
  The cost of using virtual servers from Cloud Provider Xis10QX6X$10 = $6,000.
  The cost of using virtual servers from Cloud Provider Y is 1,120 X $20 = $22,400.
  The cloud consumer must therefore choose Cloud Provider X.
• C. The total usage duration is (10 + 20 + 70) x 12 hours = 1.200 hours.
  The actual usage is (10X6) + (20X4) + (70X2) hours = 280 server hours.
  The cost of using virtual servers from Cloud Provider Xis12X100X5X$10 = $60,000.
  The cost of using virtual servers from Cloud Provider Y is 280 X $20 = $5,600.
  The cloud consumer must therefore choose Cloud Provider Y.
• D. The total usage duration is (10 + 20 + 70) hours = 100 hours.
  The actual usage is (10 X 6) + (20 X 4) + (70 X 2) hours = 280 hours.
  The cost of using virtual servers from Cloud Provider X is 100X6X$10 = $6,000.
  The cost of using virtual servers from Cloud Provider Y is 280 X $20 = $5,600.
  The cloud consumer must therefore choose Cloud Provider Y.

A company is planning to build and launch a new SaaS product that will be available for
use by the general public. It intends to build the service on-premise and then deploy it in a
public cloud. The company has the following set of four requirements for the
implementation of the new service:
1. The cloud service needs to exchange messages primarily by using HTTP methods and
other features provided by HTTP.
2. The cloud service needs to store highly structured data with potentially complex
relationships.
3. The cloud service needs to be deployed on a dedicated virtual server that can be
administered with a high level of control by the cloud consumer's own cloud resource
administrator.
4. The cloud service needs to be deployed with a minimal amount of integration testing.
For this project, the company has a very limited budget. The company is assessing the IT
resources that are offered by Clouds X and Y within the constraints of its limited budget.
Cloud X can offer an IaaS environment with very few proprietary characteristics that
includes a database that supports only no relational storage, as well as support for the
deployment and usage of REST services.

Cloud Y can offer a PaaS environment with a pre-configured virtual server that includes
native support for WSDL and SOAP, as well as a database that supports only relational
storage. The implementation of a new service within Cloud Y will require compliance to a
high level of proprietary characteristics.
As previously listed, the company has identified four specific implementation requirements
for its new cloud service. Which of the following statements correctly identifies how many of
the four requirements Clouds X and Y can directly fulfill?

• A. Cloud X fulfills 1 out of 4 requirements. Cloud Y fulfills 3 out of 4 requirements.
• B. Cloud X fulfills 0 out of 4 requirements. Cloud Y fulfills 4 out of 4 requirements.
• C. Cloud X fulfills 2 out of 4 requirements. Cloud Y fulfills 2 out of 4 requirements.
• D. Cloud X fulfills 3 out of 4 requirements. Cloud Y fulfills 1 out of 4 requirements.

Cloud Provider X has deployed a virtualization environment in Cloud X comprised of
Physical Server A hosting Virtual Servers A and B.
Cloud Provider X implements Cloud
Service A on Virtual Server A and makes it available to Cloud Service Consumer A, which
interacts with Cloud Service A by sending and receiving messages (1, 2).
Cloud Provider Y has deployed a virtualization environment comprised of Physical Server B
hosting Virtual Servers C and D.
Virtual Server C is made available to Cloud Service
Consumer B, which interacts with Virtual Server C (3,4) in order to prepare for the
deployment of a new cloud service that will be used internally by Cloud Provider Y to
process data obtained from Cloud Service A.

Cloud X is administered by a group of organizations and makes Cloud Service A available
only to cloud service consumers from that group. Cloud Consumer Z belongs to one of the
organizations within this group. Cloud Y and Cloud Consumer Z are owned by the same
organization. Which of the following statements provides a valid scenario that accurately
describes the involvement of cloud deployment models, cloud delivery models, roles and/or
boundaries? (Note that the correct answer represents one of multiple valid scenarios that
can exist.)

• A. Cloud X is based on the hybrid cloud deployment model. Cloud Service A is based on
  the SaaS delivery model. Cloud Y is based on the community cloud deployment model.
  Virtual Server C is being offered as part of the IaaS delivery model. A cloud resource
  administrator working for Cloud Consumer Z uses Cloud Service Consumer A to access
  Cloud Service A.
  Cloud Consumer Z's organizational and trust boundaries encompass
  Cloud Service Consumers A and B, Cloud Service A and Virtual Server C.
• B. Cloud X is based on the community cloud deployment model. Cloud Service A is based
  on the SaaS delivery model. Cloud Y is based on the private cloud deployment model.
  Virtual Server C is being offered as part of the IaaS delivery model. A cloud resource
  administrator working for Cloud Consumer Z uses Cloud Service Consumer B to access
  Virtual Server C.
  Cloud Consumer Z is the cloud service owner of Cloud Service A.
  Cloud Consumer T's organizational boundary encompasses Cloud Service Consumers A and B.
  Cloud Consumer Z's trust boundary encompasses Cloud Service A and Virtual Server C.
• C. Cloud X is based on the community cloud deployment model. Cloud Service A is based
  on the SaaS delivery model. Cloud Y is based on the private cloud deployment model.
  Virtual Server C is being offered as part of the IaaS delivery model. A cloud resource
  administrator working for Cloud Consumer Z uses Cloud Service Consumer B to access
  Virtual Server C.
  Cloud Consumer Z' s trust boundary encompasses Cloud Service
  Consumers A and B, as well as Cloud Service A and Virtual Server C.
  The organization
  that owns Cloud Consumer Z will be the cloud service owner of the new cloud service that
  will be deployed on Virtual Server C.
• D. Clouds X and Y are based on the community cloud deployment model. Cloud Service A
  is based on the SaaS delivery model. Virtual Server C is being offered as part of the PaaS
  delivery model. A cloud resource administrator working for Cloud Provider X uses Virtual
  Server A to access the Cloud Service A implementation Cloud Consumer T s trust
  boundary encompasses Cloud Service Consumers A and B, Cloud Service A and Virtual
  Server C.
  The organization that owns Cloud Consumer Z is the cloud service owner of
  Cloud Service A.