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SOA Certified Professional Certified Cloud Computing Specialist C90-06A : Cloud Architecture Lab

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Question 2: Cloud Sen/ice A is hosted by Virtual Server A, which is hosted by Hypervisor A on Physical
Server
A. Cloud Service B is hosted by Virtual Server B.
Virtual Server C hosts Cloud Services C and D.
Virtual Server B and Virtual Server C are hosted by Hypervisor B on Physical Server B.
Cloud Service Consumer A accesses Cloud Service A (1). Cloud Service Consumer B accesses Cloud
Service A (2). Cloud Service Consumer C accesses Cloud Service A (3) and then accesses Cloud
Service B (4).
Cloud Service Consumers A, B and C simultaneously access Cloud Service A.
Cloud Service Consumer C receives a runtime exception and its request for access is rejected. It is
determined that Cloud Service Consumer C attempted to upload a large amount of input data for
Cloud Service A, which exceeded the bandwidth threshold of the virtual network. The cloud
architecture needs to be improved to avoid this from happening again.
Cloud Service Consumer C's repeated access of Cloud Service B imposes workloads that are large
and highly unpredictable. After some time, Cloud Service B begins to delay its responses and
sometimes times out entirely. The cloud resource administrator discovers that Virtual Server B is
unstable and close to failure primarily because its CPU and memory resources are being used to
their maximum capacity.
Cloud Services C and D are being positioned as SaaS products for use by a range of cloud consumer
organizations. After their initial release, they begin to quickly use up the available memory in Virtual
Server C, primarily because of the large amounts of state and session data they need to place into
memory for extended periods.
Which of the following statements lists the patterns that can be applied to solve these three
requirements and problems?
A. Elastic Network Capacity, Load Balanced Virtual Server Instances, Service State Management
B. Elastic Resource Capacity, Service Load Balancing, Synchronized Operating State
C. Persistent Virtual Network Configuration. Load Balanced Virtual Switches, Service State
Management
D. None of the above.
Correct Answer: A