| Question.16 Which pillar of the AWS Well-Architected Framework is supported by the design philosophy of performing operations as code? (A) Performance efficiency (B) Operational excellence (C) Reliability (D) Security |
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Answer is (B) Operational excellence
There are five design principles for operational excellence in the cloud:
Perform operations as code: In the cloud, you can apply the same engineering discipline that you use for application code to your entire environment. You can define your entire workload (applications, infrastructure, etc.) as code and update it with code. You can script your operations procedures and automate their execution by triggering them in response to events. By performing operations as code, you limit human error and enable consistent responses to events.
Reference:
https://docs.aws.amazon.com/wellarchitected/latest/operational-excellence-pillar/design-principles.html
| Question.17 Which pillar of the AWS Well-Architected Framework is designed on the idea of frequent, minor, reversible changes? (A) Reliability (B) Operational excellence (C) Performance efficiency (D) Cost optimization |
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Answer is (B) Operational excellence
Make frequent, small, reversible changes.
Reference:
https://aws.amazon.com/blogs/apn/the-5-pillars-of-the-aws-well-architected-framework/
| Question.18 What is raised when a business deploys web servers across several AWS Regions? (A) Coupling (B) Availability (C) Security (D) Durability |
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Answer is (B) Availability
Available stands for the uptime and durability normally used to state about the data. Since the questions says it is web server, whereas important data is stored on remote storage (ex. EBS or Databases), durability is not the concern here.
Reference:
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-regions-availability-zones.html
| Question.19 Which of the following is a shared control between a client and AWS under the shared responsibility model? (A) Physical controls (B) Patch management (C) Zone security (D) Data center auditing |
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Answer is (B) Patch management
Patch Management: AWS is responsible for patching and fixing flaws within the infrastructure, but customers are responsible for patching their guest OS and applications.
Zone Security is customer only. Patch management is shared responsibility
| Question.20 How should an application be created to function on the AWS Cloud in accordance with best practices? (A) Use tightly coupled components. (B) Use loosely coupled components. (C) Use infrequently coupled components. (D) Use frequently coupled components. |
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Answer is (B) Use loosely coupled components.
As application complexity increases, a desirable attribute of an IT system is that it can be broken into smaller, loosely coupled components. This means that IT systems should be designed in a way that reduces interdependencies—a change or a failure in one component should not cascade to other components.