PAS-C01 Practice Test 3 — 10 Questions

Question 1

A company is migrating a critical application to AWS using a phased approach. The application uses a custom Linux distribution that is not supported by AWS Application Migration Service. Which THREE steps should the company take to migrate the application? (Choose THREE)

Accepted Answer

Use AWS Server Migration Service (SMS) to replicate the on-premises server to AWS.. AWS Server Migration Service (SMS) is the correct choice because it is an agentless service that can replicate on-premises servers running custom Linux distributions as long as they are supported by the underlying hypervisor. SMS uses incremental replication to create Amazon Machine Images (AMIs) from the source server, enabling a lift-and-shift migration without requiring the application to be converted to a different OS. This approach directly addresses the scenario where AWS Application Migration Service does not support the custom Linux distribution.

Answer

Convert the application to run on Amazon Linux 2 to simplify future management.

Answer

Use AWS Database Migration Service (DMS) to migrate the application server.

Question 2

A team is migrating an Oracle database to Amazon RDS for MySQL using AWS DMS with ongoing replication (CDC). The initial load succeeded, but the CDC task fails with the error shown in the exhibit. The source Oracle database is on-premises. Which action should the team take to resolve the issue?

Accepted Answer

Connect to the source Oracle database and enable full supplemental logging by executing the command: ALTER DATABASE ADD SUPPLEMENTAL LOG DATA (ALL) COLUMNS;. AWS DMS requires full supplemental logging on the source Oracle database to capture all column values for CDC (ongoing replication). Without it, DMS cannot reconstruct the complete row changes from the redo logs, causing the CDC task to fail. Enabling full supplemental logging with `ALTER DATABASE ADD SUPPLEMENTAL LOG DATA (ALL) COLUMNS;` ensures that every column is logged, allowing DMS to replicate all changes correctly.

Answer

Configure binary logging on the target MySQL RDS instance.

Answer

Stop and restart the DMS task to clear the error.

Answer

Switch the target database to Amazon RDS for Oracle to maintain compatibility.

Question 3

Drag and drop the steps to troubleshoot an SAP HANA database connection failure from an SAP application in AWS into the correct order.

Question 4

Drag and drop the steps to perform a backup and restore of an SAP HANA database using AWS Backup into the correct order.

Question 5

Drag and drop the steps to configure an SAP Fiori front-end server on AWS behind an Application Load Balancer (ALB) into the correct order.

Question 6

Drag and drop the steps to implement disaster recovery for SAP S/4HANA using AWS Elastic Disaster Recovery (DRS) into the correct order.

Question 7

A company is migrating a legacy application to AWS. The application requires a static IP address that does not change during instance stop/start. The application also needs to be highly available across two Availability Zones. Which THREE actions should the company take to meet these requirements?

Accepted Answer

Use a Network Load Balancer with an Elastic IP address. A Network Load Balancer (NLB) supports static IP addresses by allowing you to associate an Elastic IP address with each of its Availability Zone subnets. This provides a fixed entry point that does not change when backend instances are stopped or started, meeting the requirement for a static IP. Combined with an Auto Scaling group spanning two Availability Zones, the NLB ensures high availability by distributing traffic across healthy instances in both zones.

Answer

Place the instances in a placement group to ensure high availability

Answer

Use an Application Load Balancer to distribute traffic to the instances

Question 8

A company wants to centralize monitoring of EC2 instance metrics across multiple AWS accounts. Which solution is MOST scalable and cost-effective?

Accepted Answer

Set up CloudWatch cross-account observability with a monitoring account.. CloudWatch cross-account observability allows you to centralize monitoring by designating a monitoring account that can view metrics, logs, and traces from multiple source accounts. This approach is scalable because it uses a single monitoring account without requiring manual logins or complex data pipelines, and it is cost-effective because you only pay for the metrics you ingest and store in the monitoring account, avoiding redundant data transfers or storage costs.

Answer

Log in to each account and view CloudWatch metrics individually.

Answer

Use CloudWatch cross-region metrics to aggregate metrics in a single account.

Answer

Configure each account to publish metrics to an S3 bucket and use Athena to query.

Question 9

A company runs a production web application on EC2 instances behind an ALB. The operations team receives an alert that the application is returning HTTP 503 errors. Which THREE steps should be taken to diagnose the issue?

Accepted Answer

Check the ALB's HealthyHostCount metric in CloudWatch.. The ALB's HealthyHostCount metric in CloudWatch shows the number of healthy targets registered to the target group. A value of zero or a persistent drop indicates that all EC2 instances are failing health checks, which directly causes HTTP 503 errors because the ALB has no healthy targets to forward traffic to. This metric is the first place to check when diagnosing 503 errors, as it pinpoints whether the issue is with target health rather than network connectivity or load.

Answer

Review VPC Flow Logs to identify if traffic is reaching the ALB.

Question 10

A company runs a critical workload on Amazon RDS for PostgreSQL with Multi-AZ. The operations team notices that during a recent failover test, the DNS record updated in about 60 seconds. However, the application experienced a 2-minute downtime because some connections were not re-established quickly. What should the team do to reduce downtime during failover?

Accepted Answer

Configure the application's connection string to use the RDS read-replica endpoint with a retry mechanism.. Option C is correct because configuring the application's connection string to use the RDS read-replica endpoint with a retry mechanism allows the application to quickly fail over to the read replica during a Multi-AZ failover. The read-replica endpoint remains constant and does not rely on DNS propagation, reducing downtime from DNS TTL delays. Combined with a retry mechanism, this ensures connections are re-established immediately after the failover completes, rather than waiting for the DNS record to update.

Answer

Enable automated backups with a short retention period.

Answer

Increase the TTL of the RDS DNS record to 300 seconds.

Answer

Place a Network Load Balancer in front of the RDS instance.