Migration & Transfer — DMS + S3 staging for database moves

15 timed scenario questions (~24 min, ~96 sec each). Reinforces night-20-dms-s3-migration.md and night-20-lab-migration-setup scripts. Answer without peeking at night-20-quiz-answers.json first.

1. 1.Legacy on-prem Oracle resort_stats must move to Aurora PostgreSQL with minimal write downtime during cutover. Which AWS pair handles schema conversion and ongoing replication?

   A.AWS Schema Conversion Tool (SCT) for DDL + AWS DMS full load and CDCB.AWS DataSync for schema conversion + AWS Backup for CDC replicationC.AWS Snowball Edge for DDL export + RDS snapshot export for CDC for this workloadD.AWS Transfer Family SFTP upload + DynamoDB import path for CDC for this workload

2. 2.After DMS full load completes on Postgres→Aurora, production still writes to the source for six hours before cutover. Which DMS task mode keeps the target current?

   A.Full load only — no further replication after the initial table copyB.Full load + CDC — transaction logs continue after the initial copyC.CDC only — assumes the target already holds every historical rowD.S3 export only — DynamoDB JSON staging replaces CDC for Postgres

3. 3.A ski-resort NAS holds 600 TB of video. The data center link is 500 Mbps and leadership wants offline transfer. Best primary service?

   A.AWS DMS replication instance with full load + CDC for the video filesB.AWS DataSync agent scheduled hourly over the constrained 500 Mbps link for this workloadC.AWS Snowball Edge or Snowball device shipment for offline bulk transferD.DynamoDB export to point in time as the primary video migration path

4. 4.Partners must upload daily CSV resort files via SFTP into your landing S3 bucket. Managed service?

   A.AWS DMS S3 target endpoint with CDC for partner CSV file uploads for this workloadB.AWS DataSync between on-prem NFS shares and the landing S3 bucket for this workloadC.AWS Application Migration Service (MGN) for partner SFTP file dropsD.AWS Transfer Family (managed SFTP) integrated with the landing S3 bucket

5. 5.night-20-lab exports saa-study-gsa-wiki-views to s3://saa-study-gsa-migration-298043721974/night-20/dynamodb/wiki-views/. Which prerequisite must be true on the table?

   A.Point-in-time recovery (PITR) enabled — required for DynamoDB export to S3B.DynamoDB global tables with two active Regions already configured for this workloadC.AWS Backup vault lock enabled in the same account before export for this workloadD.StreamViewType NEW_AND_OLD_IMAGES disabled on the wiki views table for this workload

6. 6.Compare AWS DataSync and AWS DMS for the Global Ski Atlas migration portfolio. Which statement is correct?

   A.DataSync replicates database transaction logs; DMS syncs files only for this workloadB.DMS migrates databases (full load/CDC); DataSync moves files/objects onlineC.Both require a Snowball device for every initial seed transfer job for this workloadD.DMS replaces S3 object storage; DataSync replaces Aurora clusters for this workload

7. 7.Same-engine PostgreSQL on RDS must move to Aurora PostgreSQL in the Night 9 VPC. No engine change. Migration type and tool?

   A.Heterogeneous — requires SCT and Glue ETL only for the moveB.Heterogeneous — Snowmobile required to ship WAL files offlineC.Homogeneous — DMS full load + CDC without SCT schema conversionD.Homogeneous — Transfer Family SFTP only, with no DMS task for this workload

8. 8.Ops restored an Aurora cluster from a Night 19 AWS Backup recovery point in a staging VPC. Production source still accepts writes until cutover. What closes the gap?

   A.Enable DynamoDB PITR on the restored Aurora cluster for catch-upB.CloudTrail data events replay into Aurora to close the write gapC.Route 53 latency routing alone syncs rows between source and target for this workloadD.DMS CDC from the live production source to the restored Aurora target

9. 9.An exam question mentions variable-duration database migration with no fixed replication instance size. Which DMS option fits?

   A.DMS Serverless — capacity scales automatically with the migration workloadB.DMS on Snowcone only — appliance size replaces replication instances for this workloadC.RDS Multi-AZ synchronous standby as the migration compute layer for this workloadD.DynamoDB on-demand billing mode for relational DMS replication for this workload

10. 10.You need a portable copy of wiki view counters in S3 for Athena SQL (Night 23 preview), not a new live DynamoDB table. Best export path tonight?

    A.PITR restore to saa-study-gsa-wiki-views-restored as a live table for this workloadB.DynamoDB export to point in time → S3 (night-20-lab staging pattern)C.AWS Backup recovery point mounted as a filesystem for Athena SQLD.DMS homogeneous replication from DynamoDB into ElastiCache Redis

11. 11.night-20-lab creates saa-study-gsa-migration-298043721974 tagged saa-study-migration=night-20. What is this bucket's primary role?

    A.Route 53 health check target for DR failover routing policy checksB.CloudTrail log archive that replaces AWS Backup vault storage for this workloadC.Encrypted S3 staging for DynamoDB export files and migration artifactsD.DMS replication instance root EBS volume snapshot store location for this workload

12. 12.200 VMware VMs in the resort data center must rehost to EC2 with minimal OS reinstall. Primary AWS service?

    A.AWS DMS with heterogeneous endpoints for each VMware guest OS for this workloadB.DynamoDB import from S3 as the primary VM rehost mechanism for this workloadC.AWS Backup cross-Region copy of AMIs without a migration service for this workloadD.AWS Application Migration Service (MGN) for lift-and-shift rehost to EC2

13. 13.night-20-lab-migration-teardown.ps1 runs after the quiz. What does teardown remove?

    A.Migration S3 bucket contents and bucket only — Night 18 wiki table remainsB.saa-study-gsa-wiki-views and all stream Lambda event source mappings for this workloadC.Night 16 Aurora cluster because export referenced resort_stats rows for this workloadD.Night 19 backup vault and all recovery points stored in the vault for this workload

14. 14.DMS replication instance sits in a private subnet and must reach saa-study-gsa-aurora on 5432. Which network pattern matches the exam?

    A.Aurora public accessibility = Yes with 0.0.0.0/0 on the database SG for this workloadB.Security group on Aurora allows TCP 5432 from the DMS replication instance SGC.Internet Gateway attached to the private DB subnet route table for this workloadD.NAT Gateway attached directly to the Aurora cluster ENI for DMS for this workload

15. 15.Compare DynamoDB export to S3 (Tonight) with DMS targeting DynamoDB. When is native export the better answer?

    A.Continuous live replication with sub-second lag to a second table for this workloadB.Heterogeneous Oracle → DynamoDB conversion that still needs SCT for this workloadC.Bulk extract to S3 for analytics staging — no DMS replication instance neededD.On-prem MySQL binlog CDC streaming continuously into DynamoDB for this workload