Review questions

Review questions

Test your understanding with these questions. Marking and saved results are available with a free account.

1. Question 1An image archive grows unpredictably, and procuring and operating NAS capacity has become the scaling ceiling. What direct cloud value fits?

   Buy NAS for a five-year peak before growth is known. Use Amazon S3 object storage that scales with object count and size without operating a file-server ceiling. Manually enlarge one server disk every month. Put images in a relational database because all data must be rows.
2. Question 2Demand remains uncertain, and procurement proposes buying for a five-year peak. Which cloud principle fits?

   Purchase distant-peak fixed capacity Capacity based on measurement, not guessing Only calculate TCO Scale one resource vertically
3. Question 3Original instructional case: An operations team will reject any design that adds an unstated failure objective. The solution must recover from loss of one Availability Zone while keeping the database in one Region. The acceptance sample runs 70 representative operations and permits no more than 1 unexpected failure. Acceptance requires the team to force a supported failover and measure reconnection time and committed-data behavior. Which choice meets these constraints and acceptance evidence?

   a Multi-AZ design for an Availability Zone failure Amazon EC2 for operating-system control AWS Backup for centrally managed backup policies a tested multi-Region recovery design for a Region failure
4. Question 4The team selected a tested multi-Region recovery design for a Region failure. Which verification record tests the decisive behavior rather than an adjacent capability?

   verify plan entitlement, case visibility, severity evidence, and case number run a regional failover and measure both recovery point and recovery time map licenses to host identity and verify placement remains compliant after maintenance run the representative analytical query and record scan volume and completion time
5. Question 5A platform team knows that its workload is sensitive to memory latency and bandwidth, and it measured the access pattern and response limits before choosing technology. Which design principle should govern the evaluation?

   Run a bounded experiment comparing two compatible technologies with a hypothesis and acceptance metrics before commitment. Align the technology and its consumption model with measured workload goals and characteristics—applying mechanical sympathy. Standardize on a familiar compute shape to reduce operational variance, then reevaluate from production measurements. Scale horizontally behind a load balancer to increase aggregate throughput while retaining the current memory profile.
6. Question 6A company wants to test a new geographic market within weeks without buying land or building a local data center. Which cloud benefit is most direct?

   Use global infrastructure to launch resources near the market quickly. Purchase five years of hardware capacity upfront. Depend on one Availability Zone to reduce planning. Transfer data-classification responsibility to AWS.
7. Question 7Baseline load grows 25% annually and is reviewed quarterly, while a surprise campaign raises demand eightfold for two hours. Which capacity behavior is required?

   Elasticity alone with no planned baseline increase. Scalability for the measured baseline and elasticity for the two-hour spike and contraction. Scalability alone by permanently buying campaign peak. No measurement is needed because the resource is in cloud.
8. Question 8A SQL transaction application needs low database capacity most of the week, then demand spikes sharply for unpredictable hours. The team wants a measured minimum and maximum rather than one fixed instance class. What fits?

   Aurora provisioned with a large fixed instance sized for peak at all times. Aurora Serverless v2 with a measured minimum and maximum ACU range, testing scaling and connections under load. Amazon Redshift because every variable workload becomes columnar analytics. DynamoDB without changing the relational data model or transactions.
9. Question 9The order log must survive loss of an entire Region with RPO no greater than two minutes and RTO no greater than 30 minutes. Which drill record is the only one that proves the failure scope and both limits?

   A Multi-AZ drill within one Region: RPO=0 and RTO=4 minutes A multi-Region drill: RPO=3 minutes and RTO=18 minutes A multi-Region drill: RPO=1 minute and RTO=38 minutes A multi-Region drill: RPO=1 minute 40 seconds and RTO=26 minutes
10. Question 10A monthly release bundles dozens of unrelated changes, making fault isolation and rollback difficult. Which Operational Excellence principle addresses this?

    Increase the size of each release. Make frequent, small, reversible changes. Remove monitoring after deployment. Combine every environment into one account.
11. Question 11Health checks detect an unhealthy instance, but the service waits for manual intervention to replace it. Which Reliability principle matches the need?

    Disable health checks. Automatically recover from failure while retaining tests to verify behavior. Increase user permissions. Purchase five years of fixed capacity.
12. Question 12A service objective requires 99.95% monthly availability for a 30-day month. What approximate maximum downtime does the error budget allow before the objective fails?

    2.16 minutes. 7.2 minutes. 21.6 minutes. 216 minutes.
13. Question 13Original instructional case: Transaction volume grows 20% each year with no seasonal spikes. Capacity is reviewed quarterly. Acceptance requires a load test at the projected three-year volume to remain within the latency and throughput targets. Which choice addresses this evidence?

    Scale capacity for predictable growth Match capacity automatically to a temporary spike Reduce time to create an experiment environment Distribute copies across two Availability Zones
14. Question 14Original instructional case: A two-hour campaign raises demand tenfold and then it falls. Which choice produces the required behavior and passes the stated acceptance evidence?

    Scale capacity for predictable growth Match capacity automatically to a temporary spike Reduce time to create an experiment environment Distribute copies across two Availability Zones
15. Question 15Original instructional case: A product team must create an isolated experiment environment in one hour, run a one-day hypothesis test, and remove the environment from the same script. Acceptance measures provisioning time and verifies clean teardown. Which choice addresses this evidence?

    Scale capacity for predictable growth Match capacity automatically to a temporary spike Reduce time to create an experiment environment Distribute copies across two Availability Zones
16. Question 16Original instructional case: the product team must create an isolated experiment environment from an approved template within fifteen minutes and remove it after one day; no production demand requires more capacity. Which choice produces the required behavior and passes the stated acceptance evidence?

    Scale out the stateless tier against a quarterly load-test target Add temporary capacity only when a short spike occurs Create experiment environments faster Place unchanged capacity in a second Availability Zone
17. Question 17Original instructional case: workers already scale with queue depth, but one Availability Zone outage stopped them all; current capacity must span two Zones and processing continuity must be tested. Which choice produces the required behavior and passes the stated acceptance evidence?

    Increase permanent annual capacity regardless of queue depth Scale workers from queue depth and scale back after the drain target Create a new experiment environment for each broadcast Add a second Availability Zone without changing worker count
18. Question 18Original instructional case: The service must tolerate a data-center failure within the Region but not a regional disaster. Which choice produces the required behavior and passes the stated acceptance evidence?

    Deploy across two Availability Zones in one Region Use only a daily backup Use tested multi-Region recovery Increase one instance size
19. Question 19Original instructional case: The finance archive accepts a full day of loss and can be restored tomorrow; acceptance requires a successful restore or failover exercise, not the existence of a backup or second copy. Which choice produces the required behavior and passes the stated acceptance evidence?

    Deploy across two Availability Zones in one Region Use only a daily backup Use tested multi-Region recovery Increase one instance size
20. Question 20Original instructional case: The emergency service cannot accept a regional outage and failover is tested quarterly. Which choice produces the required behavior and passes the stated acceptance evidence?

    Deploy across two Availability Zones in one Region Use only a daily backup Use tested multi-Region recovery Increase one instance size
21. Question 21Original instructional case: Business impact requires the order database to survive loss of an entire Region with a five-minute RPO and four-hour RTO. Acceptance requires a regional failover exercise that measures both objectives. Which choice addresses this evidence?

    Use a tested Multi-AZ database deployment and measure failover/reconnection Restore the latest daily backup after the failure Use a tested multi-Region database design and measure regional RPO and RTO Increase the writer instance size
22. Question 22Original instructional case: An archive system must recover from complete loss of an AWS Region, accepts an 8-hour RTO and a 24-hour RPO, and prioritizes low ongoing recovery cost. Which strategy fits?

    Run actively across two Availability Zones only. Copy backups to another Region and rehearse restoration against the RTO and RPO. Run active-active across Regions at all times. Increase one instance size.
23. Question 23Original instructional case: Incidents recur because response steps exist only in one person’s memory. Acceptance requires a second responder to follow the documented steps during a simulation and resolve it within the target without help from the author. Which choice addresses this evidence?

    Improve operational excellence with a repeatable procedure Strengthen security with least privilege Increase reliability through recovery testing Optimize cost by removing measured waste
24. Question 24Original instructional case: The analytics team can modify resources it does not need. Which choice produces the required behavior and passes the stated acceptance evidence?

    Improve operational excellence with a repeatable procedure Strengthen security with least privilege Increase reliability through recovery testing Optimize cost by removing measured waste
25. Question 25Original instructional case: Backups exist but no restore test has ever succeeded; the failure scope is one Availability Zone and the failover test records recovery time and committed-data behavior. Which choice produces the required behavior and passes the stated acceptance evidence?

    Improve operational excellence with a repeatable procedure Strengthen security with least privilege Increase reliability through recovery testing Optimize cost by removing measured waste
26. Question 26A company uses cloud capabilities to launch a new digital subscription for customers it did not previously serve, with a new value proposition, pricing, and revenue stream. Which AWS CAF transformation domain best describes the primary outcome?

    Technology transformation only, because resources run in the cloud. Process transformation, because an existing internal workflow is automated. Product transformation, because a new value proposition and revenue model reach new customers. Organizational transformation, because only the team structure changes.
27. Question 27An organization bought servers one year ago for a nonrecoverable amount. It now compares the next three years of retaining them versus migrating, and there may be future book-value write-off, contract-exit, and disposal effects. What is the sound economic treatment?

    Charge the entire past purchase price to the migration option so the earlier decision does not look wasted. Ignore every effect of existing assets, including recoverable value, cash exit costs, and a noncash book-value write-off. Always retain because the money has already been spent. Exclude the nonrecoverable past purchase; compare incremental future cash flows, and show any future book-value write-off separately as a noncash accounting effect.
28. Question 28Original instructional case: The facility contract ends in eight weeks and the critical application cannot be rebuilt now. Which choice produces the required behavior and passes the stated acceptance evidence?

    Rehost for a near deadline with a later gate Replatform to remove a bounded operational burden Retain because of a proven temporary constraint Retire after confirming no value and retention duties
29. Question 29Original instructional case: A self-managed database can move to a managed service without changing the application; the failure scope is one Availability Zone and the failover test records recovery time and committed-data behavior. Which choice produces the required behavior and passes the stated acceptance evidence?

    Rehost for a near deadline with a later gate Replatform to remove a bounded operational burden Retain because of a proven temporary constraint Retire after confirming no value and retention duties
30. Question 30Original instructional case: A workload is tied to licensed hardware that cannot support another environment this year. Which choice produces the required behavior and passes the stated acceptance evidence?

    Rehost for a near deadline with a later gate Replatform to remove a bounded operational burden Retain because of a proven temporary constraint Retire after confirming no value and retention duties
31. Question 31Original instructional case: An old report has no users or retention duty after owner approval; acceptance requires a successful restore or failover exercise, not the existence of a backup or second copy. Which choice produces the required behavior and passes the stated acceptance evidence?

    Rehost for a near deadline with a later gate Replatform to remove a bounded operational burden Retain because of a proven temporary constraint Retire after confirming no value and retention duties

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