AWS Cloud Practitioner Practice Worksheets & Answer Key

Answer: Adjusting consumed capacity with demand

1. The controlling requirement is a change in capacity in both directions as workload demand changes, rather than simply a high fixed peak capacity.
2. Cloud consumption can adjust with demand. Keeping peak capacity permanently running addresses a peak but misses the requested reduction afterward.
3. Choose demand-matched capacity. Check that the conclusion is about elasticity; it neither proves lower total cost nor guarantees availability during every failure.

Answer: Assign physical infrastructure maintenance to AWS while retaining customer security decisions

1. The task being reassigned is replacement of physical equipment, not a database permission or application query.
2. AWS operates the infrastructure hosting the managed database. Customers still apply controls appropriate to their data and requirements.
3. Remove physical server replacement from the customer checklist, while keeping customer access and data-security review. Confirm that the correction does not erase the entire customer checklist.

Answer: Select a suitable approved Region for the primary placement

1. Separate the constraint on primary data placement from the fact that the audience is geographically distributed.
2. An AWS Region is a geographic grouping. An AZ is within a Region, while edge delivery serves a different content-distribution function.
3. Start with an approved Region. Check that edge proximity, AZ selection, or reader proximity does not substitute for the primary geographic approval; this first decision is not a complete residency review.

Answer: Evaluate On-Demand because the case lacks a justified long-term commitment

1. The demo has uncertain duration/use and no established long-term commitment. It also does not provide the flexibility condition used for the batch case.
2. On-Demand is usage-based purchasing. The stated facts support evaluating it rather than inventing a stable commitment or interruption tolerance.
3. Choose the On-Demand rationale. Reserved Instance or Savings Plans rationales need commitments not established here; the Spot rationale needs interruption tolerance the case does not supply. No option label completes the cost estimate.

Answer: Amazon Athena

1. The files already exist in S3 and the missing operation is interactive SQL execution, not capture or preparation.
2. Athena directly matches interactive serverless SQL analysis of S3 data. Glue preparation and catalog metadata can support analytics but are not the requested query runtime by themselves.
3. A stream-ingestion proposal would address an earlier arrival stage. This is a purpose comparison, not a claim that no other AWS analytics service can ever query S3.

Answer: Sustainability

1. The project keeps its service result as a constraint and selects environmental resource use as the comparison measure.
2. Sustainability explicitly addresses environmental impacts, energy efficiency, and resource consumption. Other pillars can support the work without naming that primary perspective.
3. Choose sustainability. Check the distinction between a constraint that must remain satisfied and the objective the review is trying to improve.

Answer: Authentication succeeded, but authorization for the object action is absent

1. The stem explicitly says identity verification completed; do not reinterpret it as a failed sign-in.
2. IAM separates authentication from authorization. The request still needs permission for the relevant action on the object.
3. The supported diagnosis is missing authorization. Check that solving it conceptually concerns the required scope, not automatically granting all actions because MFA was used.

Answer: EC2 virtual-server capacity with customer guest-OS administration

1. The decisive condition is control of the guest OS and a persistent custom host agent, rather than whether the application is described as modern or scalable.
2. EC2 supplies virtual servers whose guest software and OS are customer-managed. The standard Event Function option in this case abstracts that infrastructure.
3. Choose EC2 for its stated control model, retaining customer guest-OS and installed-agent maintenance. A managed-runtime update setting does not supply guest-OS control. This is not a price or exhaustive compute-service comparison.