Name: AWS Certified Database - Specialty
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Free Amazon DBS-C01 Exam Actual Questions

The questions for DBS-C01 were last updated On Apr 4, 2025

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Question No. 1

A company is using an Amazon RDS for MySQL DB instance for its internal applications. A security audit shows that the DB instance is not encrypted at rest. The company's application team needs to encrypt the DB instance.

What should the team do to meet this requirement?

AStop the DB instance and modify it to enable encryption. Apply this setting immediately without waiting for the next scheduled RDS maintenance window.

BStop the DB instance and create an encrypted snapshot. Restore the encrypted snapshot to a new encrypted DB instance. Delete the original DB instance, and update the applications to point to the new encrypted DB instance.

CStop the DB instance and create a snapshot. Copy the snapshot into another encrypted snapshot. Restore the encrypted snapshot to a new encrypted DB instance. Delete the original DB instance, and update the applications to point to the new encrypted DB instance.

DCreate an encrypted read replica of the DB instance. Promote the read replica to master. Delete the original DB instance, and update the applications to point to the new encrypted DB instance.

Show Answer

Correct Answer: C

Question No. 2

A Database Specialist is creating Amazon DynamoDB tables, Amazon CloudWatch alarms, and associated infrastructure for an Application team using a development AWS account. The team wants a deployment

method that will standardize the core solution components while managing environment-specific settings separately, and wants to minimize rework due to configuration errors.

Which process should the Database Specialist recommend to meet these requirements?

AOrganize common and environmental-specific parameters hierarchically in the AWS Systems Manager Parameter Store, then reference the parameters dynamically from an AWS CloudFormation template. Deploy the CloudFormation stack using the environment name as a parameter.

BCreate a parameterized AWS CloudFormation template that builds the required objects. Keep separate environment parameter files in separate Amazon S3 buckets. Provide an AWS CLI command that deploys the CloudFormation stack directly referencing the appropriate parameter bucket.

CCreate a parameterized AWS CloudFormation template that builds the required objects. Import the template into the CloudFormation interface in the AWS Management Console. Make the required changes to the parameters and deploy the CloudFormation stack.

DCreate an AWS Lambda function that builds the required objects using an AWS SDK. Set the required parameter values in a test event in the Lambda console for each environment that the Application team can modify, as needed. Deploy the infrastructure by triggering the test event in the console.

Show Answer

Correct Answer: A

https://aws.amazon.com/blogs/mt/integrating-aws-cloudformation-with-aws-systems-manager-parameter-store/

Question No. 3

A company has a database fleet that includes an Amazon RDS for MySQL DB instance. During an audit, the company discovered that the data that is stored on the DB instance is unencrypted.

A database specialist must enable encryption for the DB instance. The database specialist also must encrypt all connections to the DB instance.

Which combination of actions should the database specialist take to meet these requirements? (Choose three.)

AIn the RDS console, choose Enable encryption to encrypt the DB instance by using an AWS Key Management Service (AWS KMS) key.

BEncrypt the read replica of the unencrypted DB instance by using an AWS Key Management Service (AWS KMS) key. Fail over the read replica to the primary DB instance.

CCreate a snapshot of the unencrypted DB instance. Encrypt the snapshot by using an AWS Key Management Service (AWS KMS) key. Restore the DB instance from the encrypted snapshot. Delete the original DB instance.

DRequire SSL connections for applicable database user accounts.

EUse SSL/TLS from the application to encrypt a connection to the DB instance.

FEnable SSH encryption on the DB instance.

Show Answer

Correct Answer: A, C, E

https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Overview.Encryption.html#Overview.Encryption.Enabling

Question No. 4

A pharmaceutical company uses Amazon Quantum Ledger Database (Amazon QLDB) to store its clinical trial data records. The company has an application that runs as AWS Lambda functions. The application is hosted in the private subnet in a VPC.

The application does not have internet access and needs to read some of the clinical data records. The company is concerned that traffic between the QLDB ledger and the VPC could leave the AWS network. The company needs to secure access to the QLDB ledger and allow the VPC traffic to have read-only access.

Which security strategy should a database specialist implement to meet these requirements?

AMove the QLDB ledger into a private database subnet inside the VPC. Run the Lambda functions inside the same VPC in an application private subnet. Ensure that the VPC route table allows read-only flow from the application subnet to the database subnet.

BCreate an AWS PrivateLink VPC endpoint for the QLDB ledger. Attach a VPC policy to the VPC endpoint to allow read-only traffic for the Lambda functions that run inside the VPC.

CAdd a security group to the QLDB ledger to allow access from the private subnets inside the VPC where the Lambda functions that access the QLDB ledger are running.

DCreate a VPN connection to ensure pairing of the private subnet where the Lambda functions are running with the private subnet where the QLDB ledger is deployed.

Show Answer

Correct Answer: B

https://docs.aws.amazon.com/qldb/latest/developerguide/vpc-endpoints.html

Question No. 5

A company is using Amazon Aurora PostgreSQL for the backend of its application. The system users are complaining that the responses are slow. A database specialist has determined that the queries to Aurora take longer during peak times. With the Amazon RDS Performance Insights dashboard, the load in the chart for average active sessions is often above the line that denotes maximum CPU usage and the wait state shows that most wait events are IO:XactSync.

What should the company do to resolve these performance issues?

AAdd an Aurora Replica to scale the read traffic.

BScale up the DB instance class.

CModify applications to commit transactions in batches.

DModify applications to avoid conflicts by taking locks.

Show Answer

Correct Answer: C

https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/AuroraPostgreSQL.Reference.html

https://blog.dbi-services.com/aws-aurora-xactsync-batch-commit/