5.05 Evaluate the Variables Relevant to Design a Cloud Bursting Solution 402 Practice Questions (Page 6)

Questions 26–30

1. 26expert · hard

   A data analytics company runs a nightly batch job on-premises that takes 6 hours. The company wants to burst the job to the cloud to finish faster. The job is CPU-bound and can be parallelized. The company's cloud budget is limited. The job currently uses 100 on-premises cores. The cloud offers instances with 16 cores each. The company estimates that doubling the cores (to 200) would halve the runtime to 3 hours. Which cost analysis is MOST appropriate?

   • ACompare the cost of running 100 on-premises cores for 6 hours against the cost of running 200 cloud cores for 3 hours, including data transfer and storage costs.
   • BUse the cloud provider's spot instances to reduce compute cost, and assume the job can be interrupted and resumed.
   • CCalculate the cost of 200 cloud cores for 3 hours and compare it to the cost of 100 on-premises cores for 6 hours, ignoring data transfer since the data is already in the cloud.
   • DCompare only the hourly cost of cloud instances against the hourly cost of on-premises electricity and cooling.
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2. 27foundation · easy

   What is the primary purpose of cloud bursting in a hybrid cloud architecture?

   • ATo provide a backup site for disaster recovery
   • BTo permanently migrate all workloads from on-premises to the cloud
   • CTo replace on-premises infrastructure with a private cloud
   • DTo handle unexpected spikes in demand by extending on-premises capacity to the cloud
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4. 28expert · hard

   A hospital network runs a patient-portal application on-premises. During flu season, traffic spikes, and the network wants to burst the web tier to the cloud. The application accesses a patient database that contains PHI. The hospital's security team requires that all PHI remain on-premises. The web tier is stateless and does not store PHI locally. Which network design BEST satisfies the security requirement while enabling the burst?

   • AHave the cloud web tier make API calls back to the on-premises application, which accesses the database and returns only non-PHI results.
   • BPlace the cloud web tier in the same VNet as the on-premises database using a VPN, and allow direct database access from the cloud.
   • CReplicate the patient database to the cloud and have the cloud web tier read from the replica.
   • DUse a cloud load balancer to route traffic to either the on-premises or cloud web tier, and use sticky sessions to maintain state.
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5. 29foundation · easy

   What is the primary purpose of monitoring in a cloud bursting solution?

   • ATo increase the cost of the solution
   • BTo replace the need for automation
   • CTo ensure that the cloud provider is not overcharging
   • DTo track performance and resource utilization during burst events
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6. 30foundation · easy

   What is the primary network requirement for a cloud bursting solution to function effectively?

   • AA dedicated fiber connection to every cloud provider
   • BA public internet connection with no security restrictions
   • CA high-bandwidth, low-latency connection between on-premises and the cloud
   • DA VPN tunnel that is always active
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