SOA C90.03 - Cloud Technology Lab Exam
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Total 21 questions
Question #11 (Topic: )
The cloud service owner of Cloud Service A is evaluating Clouds X, Y and Z to determine
which cloud environment can offer the greatest level of reliability. All three clouds are
geographically dispersed across three separate time zones. As a result, each cloud
experiences usage peaks at different times. Based on the metrics provided, the greater the
usage of a cloud, the lower its reliability. When the cloud service owner complains to Cloud
Provider A (the owner of all three clouds) that none of the clouds provide an adequate level
of reliability, Cloud Provider A suggests a solution that increases resiliency.
[SOA-C90.03-6.0/SOA-C90.03-18_2.png]
Which of the following statements accurately describe how a cloud balancing solution can
be implemented to fulfill the resiliency requirements of Cloud Service A?
which cloud environment can offer the greatest level of reliability. All three clouds are
geographically dispersed across three separate time zones. As a result, each cloud
experiences usage peaks at different times. Based on the metrics provided, the greater the
usage of a cloud, the lower its reliability. When the cloud service owner complains to Cloud
Provider A (the owner of all three clouds) that none of the clouds provide an adequate level
of reliability, Cloud Provider A suggests a solution that increases resiliency.
[SOA-C90.03-6.0/SOA-C90.03-18_2.png]
Which of the following statements accurately describe how a cloud balancing solution can
be implemented to fulfill the resiliency requirements of Cloud Service A?
A. Cloud Service A is redundantly deployed in advance within Clouds X. Y and Z and is further supplemented with failover system mechanisms and specialized types of automated scaling listener mechanisms.
B. Using a PaaS environment, the cloud service owner can configure a primary Cloud Service A implementation on Cloud X so that when failure conditions occur, message requests from cloud service consumers are automatically routed to a redundant on-premise implementation of Cloud Service A. This requires the implementation of the failover system and resource replication mechanisms.
C. A type of automated scaling listener that can also be considered a cloud monitor is implemented in Clouds X, Y and Z to establish a system whereby each cloud can assume control of cloud service consumer message exchanges. This results in resilient cloud balancing, as opposed to on-demand cloud balancing.
D. Clouds X, Y and Z are equipped with failover system mechanisms and specialized types of automated scaling listener mechanisms in order to establish cross-cloud resiliency. Cloud Service A is configured so that Clouds X, Y and Z can dynamically generate redundant instances on-demand.
Answer: A,D
Question #12 (Topic: )
Cloud Service Consumer A accesses Cloud Service A (1) that resides in Cloud X. a private
A. Moving Cloud Service A to Cloud Y will require that Database A also be moved to Cloud Y due to the need for Cloud Service A and Database A to share a common virtual server within the same organizational boundary, as required by the cloud-based security group. The move of Database A will increase the integration testing effort and. as a result, will also increase the overall integration costs.
B. Once Cloud Service A is deployed in Cloud Y, it may form dependencies upon proprietary parts of Cloud Y that may limit its mobility should it be decided to move it outside of Cloud Y in the future. This can incur further locked-in costs that need to be accounted for.
C. By moving Cloud Service A to Cloud Y, the SaaS delivery model will be established for Cloud Service A, thereby allowing the service implementation to build upon existing infrastructure from underlying PaaS and laaS delivery models that would have been required for Cloud Service B to be implemented in Cloud Y.
D. Public Cloud Y charges for the use of its IT resources. Moving Cloud Service A to Cloud Y can therefore result in new on-going costs. Although Cloud Service A may be able to share some of the existing IT resources used by Cloud Service B, it will likely incur new on- going costs that need to be budgeted for.
Answer: B,D
Question #13 (Topic: )
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.
[SOA-C90.03-6.0/SOA-C90.03-21_2.png]
The cloud consumer predicts its monthly usage requirements to be as follows:
[SOA-C90.03-6.0/SOA-C90.03-21_3.png]
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?
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.
[SOA-C90.03-6.0/SOA-C90.03-21_2.png]
The cloud consumer predicts its monthly usage requirements to be as follows:
[SOA-C90.03-6.0/SOA-C90.03-21_3.png]
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) 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.
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) 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.
D. 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.
Answer: A
Question #14 (Topic: )
Cloud Service Consumer A invokes Cloud Service A from Cloud X (owned by Cloud
Provider X) (1). To fulfill the request from Cloud Service Consumer A, Cloud Service A
needs to invoke Cloud Service B that resides on Cloud Y (owned by Cloud Provider Y) (2).
After completing its processing, Cloud Service B sends a response to Cloud Service A (3).
Cloud Service A verifies the response and then finally sends its response to Cloud Service
Consumer A (4).
[SOA-C90.03-6.0/SOA-C90.03-23_2.png]
The guaranteed availability of the Cloud Service A implementation is 95% and the
guaranteed availability of the Cloud Service B implementation is 95%. Which of the
following statements accurately describes the actual availability that Cloud Service
Consumer A can receive based on the described scenario?
Provider X) (1). To fulfill the request from Cloud Service Consumer A, Cloud Service A
needs to invoke Cloud Service B that resides on Cloud Y (owned by Cloud Provider Y) (2).
After completing its processing, Cloud Service B sends a response to Cloud Service A (3).
Cloud Service A verifies the response and then finally sends its response to Cloud Service
Consumer A (4).
[SOA-C90.03-6.0/SOA-C90.03-23_2.png]
The guaranteed availability of the Cloud Service A implementation is 95% and the
guaranteed availability of the Cloud Service B implementation is 95%. Which of the
following statements accurately describes the actual availability that Cloud Service
Consumer A can receive based on the described scenario?
A. Because Cloud Service Consumer A's response message is processed by two separate cloud services, the combined availability increases as follows: 1 - (1 - 0.95) X (1 - 0.95) = 0.9975 or 99.75%
B. Because Cloud Service A acts as both a cloud service and cloud service consumer in order to process Cloud Service Consumer B's request message, Cloud Service A forms a dependency on Cloud Service B. As a result, the combined availability decreases, as follows: 0.95 X 0.95 = 0.9025 or 90.25%
C. Cloud Service Consumer A benefits from redundant cloud service implementations, thereby increasing the guaranteed availability as follows: 1 - (1 - (0.95 - 0.1)) X (1 - (0.95 - 0.1)) = 0.9775 or 97.75%
D. As a result of the dependency formed by Cloud Service Aon Cloud Service B, the combined availability decreases significantly as follows: (0.95 X 0.95) - 0.1 = 0.8025 or 80.25%
Answer: B
Question #15 (Topic: )
Cloud Service A is being made available on public Cloud X by Cloud Provider X via the
SaaS delivery model. Cloud Service A is hosted by Physical Server A that also hosts cloud
services being used by different cloud service consumers (and owned by different cloud
service owners).
Cloud Service Consumers A and B access Cloud Service A on a regular basis and
Physical Server A has been able to accommodate the resulting usage load After reviewing
SaaS delivery model. Cloud Service A is hosted by Physical Server A that also hosts cloud
services being used by different cloud service consumers (and owned by different cloud
service owners).
Cloud Service Consumers A and B access Cloud Service A on a regular basis and
Physical Server A has been able to accommodate the resulting usage load After reviewing
A. The multi-device broker mechanism can be implemented to address ubiquitous access requirements by broadening the range of cloud service consumers that can access Cloud Service A. The resilient computing mechanism can be implemented to establish the multitenancy capabilities of Cloud Service A so that it will be able to resiliency accommodate the additional cloud service consumer devices that will gain access to it.
B. The resilient computing mechanism can be implemented to address ubiquitous access requirements by making Cloud Service A available to a broader range of cloud service consumer devices, including desktops running Web browsers and various mobile devices. The resource replication mechanism can be implemented to enable multi-tenancy within the Cloud Service A implementation.
C. The resource replication mechanism can be introduced to address ubiquitous access requirements by broadening the range of cloud service consumers that can use Cloud Service A via standard service replication. The virtual server mechanism can be implemented to enable multi-tenancy via each service replication resulting from the application of the resource replication mechanism.
D. The multi-device broker mechanism can be implemented to address ubiquitous access requirements by broadening the range of cloud service consumers that can access Cloud Service A. The virtual server mechanism can be implemented to establish the multitenancy capabilities of Cloud Service A.
Answer: D
