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Amazon DBS-C01 Sample Questions
Question # 1
A company's development team needs to have production data restored in a staging AWS
account. The production database is running on an Amazon RDS for
PostgreSQL Multi-AZ DB instance, which has AWS KMS encryption enabled using the
default KMS key. A database specialist planned to share the most recent automated
snapshot with the staging account, but discovered that the option to share snapshots is
disabled in the AWS Management Console.
What should the database specialist do to resolve this?
A. Disable automated backups in the DB instance. Share both the automated snapshot and
the default KMS key with the staging account. Restore the snapshot in the staging account
and enable automated backups. B. Copy the automated snapshot specifying a custom KMS encryption key. Share both the copied snapshot and the custom KMS encryption key with the staging account. Restore the snapshot to the staging account within the same Region. C. Modify the DB instance to use a custom KMS encryption key. Share both the automated snapshot and the custom KMS encryption key with the staging account. Restore the snapshot in the staging account. D. Copy the automated snapshot while keeping the default KMS key. Share both the snapshot and the default KMS key with the staging account. Restore the snapshot in the staging account.
Question # 2
An online retail company is planning a multi-day flash sale that must support processing of
up to 5,000 orders per second. The number of orders and exact schedule for the sale will
vary each day. During the sale, approximately 10,000 concurrent users will look at the
deals before buying items. Outside of the sale, the traffic volume is very low. The
acceptable performance for read/write queries should be under 25 ms. Order items are
about 2 KB in size and have a unique identifier. The company requires the most costeffective solution that will automatically scale and is highly available.
Which solution meets these requirements?
A. Amazon DynamoDB with on-demand capacity mode B. Amazon Aurora with one writer node and an Aurora Replica with the parallel query feature enabled C. Amazon DynamoDB with provisioned capacity mode with 5,000 write capacity units (WCUs) and 10,000 read capacity units (RCUs) D. Amazon Aurora with one writer node and two cross-Region Aurora Replicas
Question # 3
A company wants to build a new invoicing service for its cloud-native application on AWS.
The company has a small development team and wants to focus on service feature
development and minimize operations and maintenance as much as possible. The company expects the service to handle billions of requests and millions of new records
every day. The service feature requirements, including data access patterns are welldefined. The service has an availability target of
99.99% with a milliseconds latency requirement. The database for the service will be the
system of record for invoicing data.
Which database solution meets these requirements at the LOWEST cost?
A. Amazon Neptune B. Amazon Aurora PostgreSQL Serverless C. Amazon RDS for PostgreSQL D. Amazon DynamoDB
Question # 4
Recently, a gaming firm purchased a popular iOS game that is especially popular during
the Christmas season. The business has opted to include a leaderboard into the game,
which will be powered by Amazon DynamoDB. The application's load is likely to increase
significantly throughout the Christmas season. Which solution satisfies these criteria at the lowest possible cost?
A. DynamoDB Streams B. DynamoDB with DynamoDB Accelerator C. DynamoDB with on-demand capacity mode D. DynamoDB with provisioned capacity mode with Auto Scaling
Question # 5
An ecommerce company uses a backend application that stores data in an Amazon
DynamoDB table. The backend application runs in a private subnet in a VPC and must
connect to this table.
The company must minimize any network latency that results from network connectivity
issues, even during periods of heavy application usage. A database administrator also
needs the ability to use a private connection to connect to the DynamoDB table from the
Which solution will meet these requirements?
A. Use network ACLs to ensure that any outgoing or incoming connections to any port
except DynamoDB are deactivated. Encrypt API calls by using TLS. B. Create a VPC endpoint for DynamoDB in the application's VPC. Use the VPC endpoint to access the table. C. Create an AWS Lambda function that has access to DynamoDB. Restrict outgoing
access only to this Lambda function from the application. D. Use a VPN to route all communication to DynamoDB through the company's own corporate network infrastructure.
Question # 6
A finance company migrated its 3 ¢’ on-premises PostgreSQL database to an Amazon
Aurora PostgreSQL DB cluster. During a review after the migration, a database specialist
discovers that the database is not encrypted at rest. The database must be encrypted at
rest as soon as possible to meet security requirements. The database specialist must
enable encryption for the DB cluster with minimal downtime.
Which solution will meet these requirements?
A. Modify the unencrypted DB cluster using the AWS Management Console. Enable
encryption and choose to apply the change immediately. B. Take a snapshot of the unencrypted DB cluster and restore it to a new DB cluster with encryption enabled. Update any database connection strings to reference the new DB cluster endpoint, and then delete the unencrypted DB cluster. C. Create an encrypted Aurora Replica of the unencrypted DB cluster. Promote the Aurora Replica as the new master. D. Create a new DB cluster with encryption enabled and use the pg_dump and pg_restore utilities to load data to the new DB cluster. Update any database connection strings to reference the new DB cluster endpoint, and then delete the unencrypted DB cluster.
Question # 7
An internet advertising firm stores its data in an Amazon DynamoDb table. Amazon
DynamoDB Streams are enabled on the table, and one of the keys has a global secondary
index. The table is encrypted using a customer-managed AWS Key Management Service
(AWS KMS) key.
The firm has chosen to grow worldwide and want to duplicate the database using
DynamoDB global tables in a new AWS Region.
An administrator observes the following upon review: No role with the dynamodb: CreateGlobalTable permission exists in the account.
An empty table with the same name exists in the new Region where replication is
A global secondary index with the same partition key but a different sort key exists
in the new Region where replication is desired.
Which settings will prevent you from creating a global table or replica in the new Region?
A. A global secondary index with the same partition key but a different sort key exists in the
new Region where replication is desired. B. An empty table with the same name exists in the Region where replication is desired. C. No role with the dynamodb:CreateGlobalTable permission exists in the account. D. DynamoDB Streams is enabled for the table. E. The table is encrypted using a KMS customer managed key.
Question # 8
A company is planning to use Amazon RDS for SQL Server for one of its critical
applications. The company's security team requires that the users of the RDS for
SQL Server DB instance are authenticated with on-premises Microsoft Active Directory
Which combination of steps should a database specialist take to meet this requirement?
A. Extend the on-premises Active Directory to AWS by using AD Connector. B. Create an IAM user that uses the AmazonRDSDirectoryServiceAccess managed IAM policy. C. Create a directory by using AWS Directory Service for Microsoft Active Directory. D. Create an Active Directory domain controller on Amazon EC2. E. Create an IAM role that uses the AmazonRDSDirectoryServiceAccess managed IAM policy. F. Create a one-way forest trust from the AWS Directory Service for Microsoft Active Directory directory to the on-premises Active Directory.
Question # 9
A company hosts a 2 TB Oracle database in its on-premises data center. A database
specialist is migrating the database from on premises to an Amazon Aurora
PostgreSQL database on AWS.
The database specialist identifies a problem that relates to compatibility Oracle stores
metadata in its data dictionary in uppercase, but PostgreSQL stores the metadata in
lowercase. The database specialist must resolve this problem to complete the migration.
What is the MOST operationally efficient solution that meets these requirements?
A. Override the default uppercase format of Oracle schema by encasing object names in
quotation marks during creation. B. Use AWS Database Migration Service (AWS DMS) mapping rules with rule-action as convert-lowercase. C. Use the AWS Schema Conversion Tool conversion agent to convert the metadata from uppercase to lowercase. D. Use an AWS Glue job that is attached to an AWS Database Migration Service (AWS DMS) replication task to convert the metadata from uppercase to lowercase.
Question # 10
A company is developing a multi-tier web application hosted on AWS using Amazon Aurora
as the database. The application needs to be deployed to production and other nonproduction environments. A Database Specialist needs to specify different
MasterUsername and MasterUserPassword properties in the AWS CloudFormation
templates used for automated deployment. The CloudFormation templates are version
controlled in the company’s code repository. The company also needs to meet compliance
requirement by routinely rotating its database master password for production.
What is most secure solution to store the master password?
A. Store the master password in a parameter file in each environment. Reference the
environment-specific parameter file in the CloudFormation template. B. Encrypt the master password using an AWS KMS key. Store the encrypted master password in the CloudFormation template. C. Use the secretsmanager dynamic reference to retrieve the master password stored in AWS Secrets Manager and enable automatic rotation. D. Use the ssm dynamic reference to retrieve the master password stored in the AWS Systems Manager Parameter Store and enable automatic rotation.
Question # 11
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 environmentspecific settings separately, and wants to minimize rework due to configuration errors.
Which process should the Database Specialist recommend to meet these requirements?
A. Organize 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. B. Create 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. C. Create 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. D. Create 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.
Question # 12
A retail company uses Amazon Redshift Spectrum to run complex analytical queries on
objects that are stored in an Amazon S3 bucket. The objects are joined with multiple
dimension tables that are stored in an Amazon Redshift database. The company uses the
database to create monthly and quarterly aggregated reports. Users who attempt to run
queries are reporting the following error message: error: Spectrum Scan Error: Access
Which solution will resolve this error?
A. Check file sizes of fact tables in Amazon S3, and look for large files. Break up large files
into smaller files of equal size between 100 MB and 1 GB B. Reduce the number of queries that users can run in parallel. C. Check file sizes of fact tables in Amazon S3, and look for small files. Merge the small files into larger files of at least 64 MB in size. D. Review and optimize queries that submit a large aggregation step to Redshift Spectrum.
Question # 13
A manufacturing company has an. inventory system that stores information in an Amazon
Aurora MySQL DB cluster. The database tables are partitioned. The database size has grown to 3 TB. Users run one-time queries by using a SQL client. Queries that use an
equijoin to join large tables are taking a long time to run.
Which action will improve query performance with the LEAST operational effort?
A. Migrate the database to a new Amazon Redshift data warehouse. B. Enable hash joins on the database by setting the variable optimizer_switch to hash_join=on. C. Take a snapshot of the DB cluster. Create a new DB instance by using the snapshot, and enable parallel query mode. D. Add an Aurora read replica.
Question # 14
A business is launching a new Amazon RDS for SQL Server database instance. The
organization wishes to allow auditing of the SQL Server database.
Which measures should a database professional perform in combination to achieve this
requirement? (Select two.)
A. Create a service-linked role for Amazon RDS that grants permissions for Amazon RDS
to store audit logs on Amazon S3. B. Set up a parameter group to configure an IAM role and an Amazon S3 bucket for audit log storage. Associate the parameter group with the DB instance. C. Disable Multi-AZ on the DB instance, and then enable auditing. Enable Multi-AZ after auditing is enabled. D. Disable automated backup on the DB instance, and then enable auditing. Enable automated backup after auditing is enabled. E. Set up an options group to configure an IAM role and an Amazon S3 bucket for audit log
storage. Associate the options group with the DB instance.
Question # 15
A company hosts an on-premises Microsoft SQL Server Enterprise edition database with
Transparent Data Encryption (TDE) enabled. The database is 20 TB in size and includes
sparse tables. The company needs to migrate the database to Amazon RDS for SQL
Server during a maintenance window that is scheduled for an upcoming weekend. Data-atrest encryption must be enabled for the target DB instance.
Which combination of steps should the company take to migrate the database to AWS in
the MOST operationally efficient manner? (Choose two.)
A. Use AWS Database Migration Service (AWS DMS) to migrate from the on-premises
source database to the RDS for SQL Server target database. B. Disable TDE. Create a database backup without encryption. Copy the backup to Amazon S3. C. Restore the backup to the RDS for SQL Server DB instance. Enable TDE for the RDS for SQL Server DB instance. D. Set up an AWS Snowball Edge device. Copy the database backup to the device. Send the device to AWS. Restore the database from Amazon S3. E. Encrypt the data with client-side encryption before transferring the data to Amazon RDS.
Question # 16
A company uses an on-premises Microsoft SQL Server database to host relational and
JSON data and to run daily ETL and advanced analytics. The company wants to migrate
the database to the AWS Cloud. Database specialist must choose one or more AWS
services to run the company's workloads.
Which solution will meet these requirements in the MOST operationally efficient manner?
A. Use Amazon Redshift for relational data. Use Amazon DynamoDB for JSON data B. Use Amazon Redshift for relational data and JSON data. C. Use Amazon RDS for relational data. Use Amazon Neptune for JSON data D. Use Amazon Redshift for relational data. Use Amazon S3 for JSON data.
Question # 17
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
A. Move 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. B. Create 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. C. Add 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. D. Create 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.
Question # 18
A company has a quarterly customer survey. The survey uses an Amazon EC2 instance
that is hosted in a public subnet to host a customer survey website. The company uses an
Amazon RDS DB instance that is hosted in a private subnet in the same VPC to store the
The company takes a snapshot of the DB instance after a survey is complete, deletes the
DB instance, and then restores the DB instance from the snapshot when the survey needs
to be conducted again. A database specialist discovers that the customer survey website
times out when it attempts to establish a connection to the restored DB instance.
What is the root cause of this problem?
A. The VPC peering connection has not been configured properly for the EC2 instance to
communicate with the DB instance. B. The route table of the private subnet that hosts the DB instance does not have a NAT
gateway configured for communication with the EC2 instance. C. The public subnet that hosts the EC2 instance does not have an internet gateway configured for communication with the DB instance. D. The wrong security group was associated with the new DB instance when it was restored from the snapshot.
Question # 19
A company is launching a new Amazon RDS for MySQL Multi-AZ DB instance to be used
as a data store for a custom-built application. After a series of tests with point-in-time
recovery disabled, the company decides that it must have point-in-time recovery reenabled
before using the DB instance to store production data.
What should a database specialist do so that point-in-time recovery can be successful?
A. Enable binary logging in the DB parameter group used by the DB instance. B. Modify the DB instance and enable audit logs to be pushed to Amazon CloudWatch Logs. C. Modify the DB instance and configure a backup retention period D. Set up a scheduled job to create manual DB instance snapshots.
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