Easy practice exam 1

Explanation

Answer: C. The performance efficiency pillar is about using resources efficiently to meet requirements and sustaining that efficiency as demand shifts and technologies advance. Its design principles are to democratize advanced technologies, go global in minutes, use serverless architectures, experiment more often, and consider mechanical sympathy.

• A. Security covers protecting data, systems, and assets, and using cloud technologies to improve the security posture.
• B. Operational excellence covers running workloads and improving the processes and procedures around them.
• D. Sustainability focuses on minimizing the environmental impact of running cloud workloads, which often overlaps with efficiency but is measured against impact rather than performance requirements.

Explanation

Answer: D. Both are design principles of the security pillar. The full set is: implement a strong identity foundation, maintain traceability, apply security at all layers, automate security best practices, protect data in transit and at rest, keep people away from data, and prepare for security events.

• A. Cost optimization's design principles concern cloud financial management, adopting a consumption model, measuring efficiency, avoiding undifferentiated heavy lifting, and analyzing and attributing expenditure.
• B. Operational excellence's design principles concern operations as code, small reversible changes, refining procedures, anticipating failure, and learning from failures.
• C. Reliability's design principles concern automatic recovery from failure, testing recovery procedures, horizontal scaling, stopping guessing capacity, and managing change through automation.

Explanation

Answer: C. The sustainability pillar addresses the long-term environmental, economic, and societal impact of a workload and focuses on reducing the resources and therefore the energy required per unit of work. Its design principles include understanding your impact, establishing sustainability goals, maximizing utilization, adopting more efficient hardware and software offerings, using managed services, and reducing the downstream impact of your workloads.

• A. Reliability is about correct, consistent operation and recovery from disruption.
• B. Performance efficiency is about meeting performance requirements with the right resources, measured against those requirements rather than against environmental impact.
• D. Cost optimization targets the lowest price point for the required business value. Sustainable choices often lower cost too, but the pillar is measured in currency rather than in impact.

Explanation

Answer: D. The principle states that you use as much or as little capacity as you need and scale in and out automatically, which eliminates both expensive idle resources and the performance consequences of limited capacity. Guessing is replaced by measuring actual demand and letting automation respond to it.

• A. Commitment-based purchasing is a cost technique for steady baseline usage. It does not determine how much capacity runs at any moment, and committing before deployment is guessing.
• B. An annual adjustment cycle is far too slow to track real demand and reintroduces the forecasting problem.
• C. Provisioning permanently for the maximum load is the on-premises pattern the principle is written against, and it produces exactly the expensive idle resources it warns about.

Explanation

Answer: D. The AWS Well-Architected Tool provides a consistent process for reviewing a workload against the pillars of the framework. It asks structured questions, identifies high-risk and medium-risk issues, and produces an improvement plan with links to the relevant guidance.

• A. AWS Compute Optimizer analyzes utilization metrics and recommends better-suited resource configurations. Its scope is rightsizing, not the six pillars.
• B. AWS Config records resource configurations and evaluates them against rules for compliance. It does not conduct a framework-based architectural review.
• C. AWS Systems Manager operates and manages nodes, handling tasks such as patching and running commands. It is an operations tool, not a review framework.

Explanation

Answer: D. That is the definition of the reliability pillar. It covers the ability to recover from infrastructure or service disruptions, dynamically acquire resources to meet demand, and mitigate disruptions such as misconfigurations and transient network issues.

• A. Operational excellence is about supporting development and running workloads effectively, and about continually improving processes and procedures.
• B. Sustainability is about minimizing the environmental impact of running the workload.
• C. Performance efficiency is about using resources efficiently to meet requirements as demand and technologies change.

Explanation

Answer: A. Rehost means moving the application from the source environment to the AWS Cloud without changing it. Because the application is untouched, rehosting is usually the fastest and lowest-risk strategy, which is why large migrations often rehost first and modernize afterwards once the workload is running on AWS.

• B. Repurchase, sometimes called "drop and shop," means replacing the application with a different product, typically moving from a traditional license to a software as a service offering.
• C. Refactor, also called re-architect, means changing the application's architecture to take advantage of cloud-native features. It is the most complex and expensive strategy, not a lift and shift.
• D. Retire means decommissioning or archiving an application that is no longer needed, so nothing is moved at all.

Explanation

Answer: B. Retire means decommissioning or archiving applications that are no longer needed, which includes shutting down the servers in that application stack. Discovery routinely finds a meaningful share of the estate in this state, and retiring it removes migration effort and ongoing cost at the same time.

• A. Relocate means transferring servers or applications to a cloud version of the existing platform, or moving instances to a different VPC, Region, or account. It still keeps the workload running.
• C. Retain means deliberately keeping an application in the source environment or postponing its migration, which implies the application is still needed.
• D. Replatform means moving the application to the cloud while making some optimizations, so the application continues to be used.

Explanation

Answer: C. AWS CAF groups its foundational capabilities into six perspectives: business, people, governance, platform, security, and operations. The first three are largely business perspectives concerned with strategy, culture, and control, while the last three are largely technical perspectives concerned with building, protecting, and running the environment.

• A. This list is invented. None of these are AWS CAF perspectives.
• B. Technology, process, organization, and product are the four AWS CAF transformation domains, not the perspectives. They describe what is being transformed rather than which stakeholder capability supports it.
• D. These are the six pillars of the AWS Well-Architected Framework, which evaluates workload architecture rather than organizational readiness for cloud adoption.

Explanation

Answer: D. AWS DMS migrates data into, out of, and between databases. It supports both a one-time full load and ongoing change data capture replication, so the source keeps serving users while the target is brought up to date. That is what allows cutover downtime to be reduced to a minimum.

• A. Migration Evaluator builds a data-driven business case for migration, including projected AWS costs. It is a planning and financial tool, not a data replication engine.
• B. AWS Migration Hub gives a single place to track the progress of migrations across AWS and partner tools. It reports on migrations rather than performing them.
• C. AWS Application Discovery Service collects configuration, usage, and dependency data from on-premises servers to support migration planning. It does not move data.