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How to study the AWS Certified Database - Specialty

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NEW QUESTION 76
A database specialist must create nightly backups of an Amazon DynamoDB table in a mission-critical workload as part of a disaster recovery strategy.
Which backup methodology should the database specialist use to MINIMIZE management overhead?

• A. Create a backup plan using AWS Backup, specify a backup frequency of every 24 hours, and give the plan a nightly backup window.
• B. Create an AWS Lambda function that creates a backup of the DynamoDB table. Create an Amazon CloudWatch Events rule that executes the Lambda function on a nightly basis.
• C. Install the AWS CLI on an Amazon EC2 instance. Write a CLI command that creates a backup of the DynamoDB table. Create a scheduled job or task that executes the command on a nightly basis.
• D. Configure DynamoDB backup and restore for an on-demand backup frequency of every 24 hours.

Answer: D

Explanation:
On-demand backup allows you to create full backups of your Amazon DynamoDB table for data archiving, helping you meet your corporate and governmental regulatory requirements. You can back up tables from a few megabytes to hundreds of terabytes of data, with no impact on performance and availability to your production applications. Backups process in seconds regardless of the size of your tables, so you do not have to worry about backup schedules or long-running processes. In addition, all backups are automatically encrypted, cataloged, easily discoverable, and retained until explicitly deleted.

 

NEW QUESTION 77
A company is due for renewing its database license. The company wants to migrate its 80 TB transactional database system from on-premises to the AWS Cloud. The migration should incur the least possible downtime on the downstream database applications. The company's network infrastructure has limited network bandwidth that is shared with other applications.
Which solution should a database specialist use for a timely migration?

• A. Use the AWS Schema Conversion Tool (AWS SCT) to migrate the full load of the source database over a VPN tunnel using the internet for its primary connection. Allow AWS SCT to handle syncing change data capture (CDC) data from the source to the target database.
• B. Perform a full backup of the source database to AWS Snowball Edge appliances and ship them to be loaded to Amazon S3. Periodically perform incremental backups of the source database to be shipped in another Snowball Edge appliance to handle syncing change data capture (CDC) data from the source to the target database.
• C. Perform a full backup of the source database to AWS Snowball Edge appliances and ship them to be loaded to Amazon S3. Use AWS DMS to migrate change data capture (CDC) data from the source database to Amazon S3. Use a second AWS DMS task to migrate all the S3 data to the target database.
• D. Use AWS DMS to migrate the full load of the source database over a VPN tunnel using the internet for its primary connection. Allow AWS DMS to handle syncing change data capture (CDC) data from the source to the target database.

Answer: A

 

NEW QUESTION 78
A company wants to migrate its existing on-premises Oracle database to Amazon Aurora PostgreSQL. The migration must be completed with minimal downtime using AWS DMS. A Database Specialist must validate that the data was migrated accurately from the source to the target before the cutover. The migration must have minimal impact on the performance of the source database.
Which approach will MOST effectively meet these requirements?

• A. Enable AWS DMS data validation on the task so the AWS DMS task compares the source and targetrecords, and reports any mismatches.
• B. Enable the AWS Schema Conversion Tool (AWS SCT) premigration validation and review the premigrationchecklist to make sure there are no issues with the conversion.
• C. Use the table metrics of the AWS DMS task created for migrating the data to verify the statistics for the tables being migrated and to verify that the data definition language (DDL) statements are completed.
• D. Use the AWS Schema Conversion Tool (AWS SCT) to convert source Oracle database schemas to the target Aurora DB cluster. Verify the datatype of the columns.

Answer: A

 

NEW QUESTION 79
A database specialist is managing an application in the us-west-1 Region and wants to set up disaster recovery in the us-east-1 Region. The Amazon Aurora MySQL DB cluster needs an RPO of 1 minute and an RTO of 2 minutes.
Which approach meets these requirements with no negative performance impact?

• A. Copy Aurora incremental snapshots to the us-east-1 Region.
• B. Create an Aurora Global Database.
• C. Enable asynchronous binlog replication.
• D. Enable synchronous replication.

Answer: D

 

NEW QUESTION 80
A database specialist needs to review and optimize an Amazon DynamoDB table that is experiencing performance issues. A thorough investigation by the database specialist reveals that the partition key is causing hot partitions, so a new partition key is created. The database specialist must effectively apply this new partition key to all existing and new data.
How can this solution be implemented?

• A. Use the AWS CLI to update the DynamoDB table and modify the partition key.
• B. Use the AWS CLI to back up the DynamoDB table. Then use the restore-table-from-backup command and modify the partition key.
• C. Use AWS DMS to copy the data from the current DynamoDB table to Amazon S3. Then import the DynamoDB table to create a new DynamoDB table with the new partition key.
• D. Use Amazon EMR to export the data from the current DynamoDB table to Amazon S3. Then use Amazon EMR again to import the data from Amazon S3 into a new DynamoDB table with the new partition key.

Answer: B

 

NEW QUESTION 81
A company wants to automate the creation of secure test databases with random credentials to be stored safely for later use. The credentials should have sufficient information about each test database to initiate a connection and perform automated credential rotations. The credentials should not be logged or stored anywhere in an unencrypted form.
Which steps should a Database Specialist take to meet these requirements using an AWS CloudFormation template?

• A. Create the database with the MasterUserName and MasterUserPassword properties set to the default values. Then, create the secret with the user name and password set to the same default values. Add a Secret Target Attachment resource with the SecretId and TargetId properties set to the Amazon Resource Names (ARNs) of the secret and the database. Finally, update the secret's password value with a randomly generated string set by the GenerateSecretString property.
• B. Create the secret with a chosen user name and a randomly generated password set by the GenerateSecretString property. Add an SecretTargetAttachment resource with the SecretId property set to the Amazon Resource Name (ARN) of the secret and the TargetId property set to a parameter value matching the desired database ARN. Then, create a database with the MasterUserName and MasterUserPassword properties set to the previously created values in the secret.
• C. Add a Mapping property from the database Amazon Resource Name (ARN) to the secret ARN. Then, create the secret with a chosen user name and a randomly generated password set by the GenerateSecretString property. Add the database with the MasterUserName and MasterUserPassword properties set to the user name of the secret.
• D. Add a resource of type AWS::SecretsManager::Secret and specify the GenerateSecretString property.
  Then, define the database user name in the SecureStringTemplate template. Create a resource for the database and reference the secret string for the MasterUserName and MasterUserPassword properties.
  Then, add a resource of type AWS::SecretsManagerSecretTargetAttachment with the SecretId and TargetId properties set to the Amazon Resource Names (ARNs) of the secret and the database.

Answer: D

 

NEW QUESTION 82
A Database Specialist is setting up a new Amazon Aurora DB cluster with one primary instance and three Aurora Replicas for a highly intensive, business-critical application. The Aurora DB cluster has one mediumsized primary instance, one large-sized replica, and two medium sized replicas. The Database Specialist did not assign a promotion tier to the replicas.
In the event of a primary failure, what will occur?

• A. Aurora will promote an Aurora Replica that is of the same size as the primary instance
• B. Aurora will not promote an Aurora Replica
• C. Aurora will promote the largest-sized Aurora Replica
• D. Aurora will promote an arbitrary Aurora Replica

Answer: A

 

NEW QUESTION 83
A small startup company is looking to migrate a 4 TB on-premises MySQL database to AWS using an Amazon RDS for MySQL DB instance.
Which strategy would allow for a successful migration with the LEAST amount of downtime?

• A. Deploy a new Amazon EC2 instance, install the MySQL software on the EC2 instance, and configure networking for access from the on-premises data center. Use the mysqldump utility to create a snapshot of the on-premises MySQL server. Copy the snapshot into an Amazon S3 bucket and import the snapshot into a new RDS for MySQL DB instance using the MySQL utilities running on an EC2 instance. Point the application to the DB instance.
• B. Deploy a new RDS for MySQL DB instance and configure it for access from the on-premises data center. Use the mysqldump utility to create an initial snapshot from the on-premises MySQL server, and copy it to an Amazon S3 bucket. Import the snapshot into the DB instance utilizing the MySQL utilities running on an Amazon EC2 instance. Immediately point the application to the DB instance.
• C. Deploy a new RDS for MySQL DB instance and configure it for access from the on-premises data center. Use the mysqldump utility to create an initial snapshot from the on-premises MySQL server, and copy it to an Amazon S3 bucket. Import the snapshot into the DB instance using the MySQL utilities running on an Amazon EC2 instance. Establish replication into the new DB instance using MySQL replication. Stop application access to the on-premises MySQL server and let the remaining transactions replicate over. Point the application to the DB instance.
• D. Deploy a new Amazon EC2 instance, install the MySQL software on the EC2 instance, and configure networking for access from the on-premises data center. Use the mysqldump utility to create a snapshot of the on-premises MySQL server. Copy the snapshot into the EC2 instance and restore it into the EC2 MySQL instance. Use AWS DMS to migrate data into a new RDS for MySQL DB instance. Point the application to the DB instance.

Answer: D

 

NEW QUESTION 84
A company is using 5 TB Amazon RDS DB instances and needs to maintain 5 years of monthly database backups for compliance purposes. A Database Administrator must provide Auditors with data within 24 hours. Which solution will meet these requirements and is the MOST operationally efficient?

• A. Create an AWS Lambda function to run on the first day of every month to take a manual RDS snapshot. Move the snapshot to the company's Amazon S3 bucket.
• B. Create an AWS Lambda function to run on the first day of every month to take a manual RDS snapshot.
• C. Create an AWS Lambda function to run on the first day of every month to create an automated RDS snapshot.
• D. Create an RDS snapshot schedule from the AWS Management Console to take a snapshot every 30 days.

Answer: A

Explanation:
Unlike automated backups, manual snapshots aren't subject to the backup retention period. Snapshots don't expire. For very long-term backups of MariaDB, MySQL, and PostgreSQL data, we recommend exporting snapshot data to Amazon S3. If the major version of your DB engine is no longer supported, you can't restore to that version from a snapshot. https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_CreateSnapshot.html

 

NEW QUESTION 85
A company has an on-premises system that tracks various database operations that occur over the lifetime of a database, including database shutdown, deletion, creation, and backup.
The company recently moved two databases to Amazon RDS and is looking at a solution that would satisfy these requirements. The data could be used by other systems within the company.
Which solution will meet these requirements with minimal effort?

• A. Write RDS logs to Amazon Kinesis Data Firehose. Create an AWS Lambda function to act on these rules and write the output to the tracking systems.
• B. Create an Amazon Cloudwatch Events rule with the operations that need to be tracked on Amazon RDS.
  Create an AWS Lambda function to act on these rules and write the output to the tracking systems.
• C. Create an AWS Lambda function to trigger on AWS CloudTrail API calls. Filter on specific RDS API calls and write the output to the tracking systems.
• D. Create RDS event subscriptions. Have the tracking systems subscribe to specific RDS event system notifications.

Answer: D

 

NEW QUESTION 86
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 cost-effective solution that will automatically scale and is highly available.
Which solution meets these requirements?

• A. Amazon Aurora with one writer node and an Aurora Replica with the parallel query feature enabled
• B. Amazon DynamoDB with provisioned capacity mode with 5,000 write capacity units (WCUs) and 10,000 read capacity units (RCUs)
• C. Amazon Aurora with one writer node and two cross-Region Aurora Replicas
• D. Amazon DynamoDB with on-demand capacity mode

Answer: B

 

NEW QUESTION 87
A company has an application that uses an Amazon DynamoDB table to store user dat a. Every morning, a single-threaded process calls the DynamoDB API Scan operation to scan the entire table and generate a critical start-of-day report for management. A successful marketing campaign recently doubled the number of items in the table, and now the process takes too long to run and the report is not generated in time.
A database specialist needs to improve the performance of the process. The database specialist notes that, when the process is running, 15% of the table's provisioned read capacity units (RCUs) are being used.
What should the database specialist do?

• A. Set the Limit and Offset parameters before every call to the API.
• B. Use four threads and parallel DynamoDB API Scan operations.
• C. Enable auto scaling for the DynamoDB table.
• D. Double the table's provisioned RCUs.

Answer: B

 

NEW QUESTION 88
A company has migrated a single MySQL database to Amazon Auror
a. The production data is hosted in a DB cluster in VPC_PROD, and 12 testing environments are hosted in VPC_TEST using the same AWS account. Testing results in minimal changes to the test data. The Development team wants each environment refreshed nightly so each test database contains fresh production data every day.
Which migration approach will be the fastest and most cost-effective to implement?

• A. Run the master in Amazon Aurora MySQL. Create 12 Aurora Replicas in VPC_TEST, and script the replicas to be deleted and re-created nightly.
• B. Run the master in Amazon Aurora MySQL. Create 12 clones in VPC_TEST, and script the clones to be deleted and re-created nightly.
• C. Run the master in Amazon Aurora MySQL. Take a nightly snapshot, and restore it into 12 databases in VPC_TEST using Aurora Serverless.
• D. Run the master in Amazon Aurora MySQL using Aurora Serverless. Create 12 clones in VPC_TEST, and script the clones to be deleted and re-created nightly.

Answer: B

 

NEW QUESTION 89
A manufacturing company's website uses an Amazon Aurora PostgreSQL DB cluster.
Which configurations will result in the LEAST application downtime during a failover? (Choose three.)

• A. Set TCP keepalive parameters to a high value.
• B. Create an Amazon CloudWatch alert triggering a restore in another Availability Zone when the primary Aurora DB cluster is unreachable.
• C. Use the provided read and write Aurora endpoints to establish a connection to the Aurora DB cluster.
• D. Set Java DNS caching timeouts to a high value.
• E. Edit and enable Aurora DB cluster cache management in parameter groups.
• F. Set JDBC connection string timeout variables to a low value.

Answer: B,C,E

 

NEW QUESTION 90
A database specialist was alerted that a production Amazon RDS MariaDB instance with 100 GB of storage was out of space. In response, the database specialist modified the DB instance and added 50 GB of storage capacity. Three hours later, a new alert is generated due to a lack of free space on the same DB instance. The database specialist decides to modify the instance immediately to increase its storage capacity by 20 GB.
What will happen when the modification is submitted?

• A. The request will fail because this storage capacity is too large.
• B. The request will fail as the most recent modification was too soon.
• C. The request will succeed only if CPU utilization is less than 10%.
• D. The request will succeed only if the primary instance is in active status.

Answer: D

 

NEW QUESTION 91
A company has an AWS CloudFormation template written in JSON that is used to launch new Amazon RDS for MySQL DB instances. The security team has asked a database specialist to ensure that the master password is automatically rotated every 30 days for all new DB instances that are launched using the template.
What is the MOST operationally efficient solution to meet these requirements?

• A. Save the password in an Amazon S3 object. Encrypt the S3 object with an AWS KMS key. Set the KMS key to be rotated every 30 days by setting the EnableKeyRotation property to true. Use a CloudFormation custom resource to read the S3 object to extract the password.
• B. Integrate the Amazon RDS for MySQL DB instances with AWS IAM and centrally manage the master database user password.
• C. Modify the CloudFormation template to use the AWS KMS key as the database password. Configure an Amazon EventBridge rule to invoke the KMS API to rotate the key every 30 days by setting the ScheduleExpression parameter to ***/30***.
• D. Create an AWS Lambda function to rotate the secret. Modify the CloudFormation template to add an AWS::SecretsManager::RotationSchedule resource. Configure the RotationLambdaARN value and, for the RotationRules property, set the AutomaticallyAfterDays parameter to 30.

Answer: C

 

NEW QUESTION 92
A company is using an Amazon Aurora PostgreSQL DB cluster with an xlarge primary instance master and two large Aurora Replicas for high availability and read-only workload scaling. A failover event occurs and application performance is poor for several minutes. During this time, application servers in all Availability Zones are healthy and responding normally.
What should the company do to eliminate this application performance issue?

• A. Configure both Aurora Replicas to have the same instance class as the primary DB instance. Implement Aurora PostgreSQL DB cluster cache management. Set the failover priority to tier-0 for the primary DB instance and to tier-1 for the replicas.
• B. Configure one Aurora Replica to have the same instance class as the primary DB instance. Implement Aurora PostgreSQL DB cluster cache management. Set the failover priority to tier-0 for the primary DB instance and one replica with the same instance class. Set the failover priority to tier-1 for the other replicas.
• C. Deploy an AWS Lambda function that calls the DescribeDBInstances action to establish which instance has failed, and then use the PromoteReadReplica operation to promote one Aurora Replica to be the primary DB instance. Configure an Amazon RDS event subscription to send a notification to an Amazon SNS topic to which the Lambda function is subscribed.
• D. Configure both of the Aurora Replicas to the same instance class as the primary DB instance. Enable cache coherence on the DB cluster, set the primary DB instance failover priority to tier-0, and assign a failover priority of tier-1 to the replicas.

Answer: A

 

NEW QUESTION 93
A large gaming company is creating a centralized solution to store player session state for multiple online games. The workload required key-value storage with low latency and will be an equal mix of reads and writes. Data should be written into the AWS Region closest to the user across the games' geographically distributed user base. The architecture should minimize the amount of overhead required to manage the replication of data between Regions.
Which solution meets these requirements?

• A. Amazon Aurora global database
• B. Amazon RDS for MySQL with multi-Region read replicas
• C. Amazon DynamoDB global tables
• D. Amazon RDS for Oracle with GoldenGate

Answer: B

 

NEW QUESTION 94
A global digital advertising company captures browsing metadata to contextually display relevant images,pages, and links to targeted users. A single page load can generate multiple events that need to be storedindividually. The maximum size of an event is 200 KB and the average size is 10 KB. Each page load mustquery the user's browsing history to provide targeting recommendations. The advertising company expectsover 1 billion page visits per day from users in the United States, Europe, Hong Kong, and India. The structureof the metadata varies depending on the event. Additionally, the browsing metadata must be written and readwith very low latency to ensure a good viewing experience for the users.
Which database solution meets these requirements?

• A. Amazon DocumentDB
• B. Amazon Aurora Global Database
• C. Amazon DynamoDB global table
• D. Amazon RDS Multi-AZ deployment

Answer: C

 

NEW QUESTION 95
A company is going to use an Amazon Aurora PostgreSQL DB cluster for an application backend. The DB cluster contains some tables with sensitive data. A Database Specialist needs to control the access privileges at the table level.
How can the Database Specialist meet these requirements?

• A. Execute GRANT and REVOKE commands that restrict access to the tables containing sensitive data.
• B. Use AWS IAM database authentication and restrict access to the tables using an IAM policy.
• C. Configure the rules in a NACL to restrict outbound traffic from the Aurora DB cluster.
• D. Define access privileges to the tables containing sensitive data in the pg_hba.conf file.

Answer: A

 

NEW QUESTION 96
A database specialist manages a critical Amazon RDS for MySQL DB instance for a company. The data stored daily could vary from .01% to 10% of the current database size. The database specialist needs to ensure that the DB instance storage grows as needed.
What is the MOST operationally efficient and cost-effective solution?

• A. Configure RDS Storage Auto Scaling.
• B. Modify the DB instance allocated storage to meet the forecasted requirements.
• C. Configure RDS instance Auto Scaling.
• D. Monitor the Amazon CloudWatch FreeStorageSpace metric daily and add storage as required.

Answer: C

 

NEW QUESTION 97
A company needs to migrate Oracle Database Standard Edition running on an Amazon EC2 instance to an Amazon RDS for Oracle DB instance with Multi-AZ. The database supports an ecommerce website that runs continuously. The company can only provide a maintenance window of up to 5 minutes.
Which solution will meet these requirements?

• A. Export the Oracle database from the EC2 instance using Oracle Data Pump and perform an import into Amazon RDS. Stop the application for the entire process. When the import is complete, change the database connection string and then restart the application.
• B. Configure AWS DataSync with the EC2 instance as the source and the RDS DB instance as the destination. Stop the application when the replication is in sync, change the database connection string, and then restart the application.
• C. Configure AWS DMS with the EC2 instance as the source and the RDS DB instance as the destination. Stop the application when the replication is in sync, change the database connection string, and then restart the application.
• D. Configure Oracle Real Application Clusters (RAC) on the EC2 instance and the RDS DB instance. Update the connection string to point to the RAC cluster. Once the EC2 instance and RDS DB instance are in sync, fail over from Amazon EC2 to Amazon RDS.

Answer: A

 

NEW QUESTION 98
A Database Specialist migrated an existing production MySQL database from on-premises to an Amazon RDS for MySQL DB instance. However, after the migration, the database needed to be encrypted at rest using AWS KMS. Due to the size of the database, reloading, the data into an encrypted database would be too time-consuming, so it is not an option.
How should the Database Specialist satisfy this new requirement?

• A. Create a snapshot of the unencrypted RDS DB instance. Create an encrypted copy of the unencryptedsnapshot. Restore the encrypted snapshot copy.
• B. Modify the RDS DB instance. Enable the AWS KMS encryption option that leverages the AWS CLI.
• C. Create an encrypted read replica of the RDS DB instance. Promote it the master.
• D. Restore an unencrypted snapshot into a MySQL RDS DB instance that is encrypted.

Answer: A

 

NEW QUESTION 99
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AWS Certified Database - Specialty Exam Reference

Preparation Sources and Resources

Following the official study guide related to the Amazon DBS-C01 exam is an excellent way to diversify your entire preparation strategy and pass the test. These are the preparation steps that are vital in order to complete the Amazon AWS Certified Database – Specialty exam.

• Official Website

  The official website offers a lot of reliable resources and information that is extremely useful in preparing for the test. These available materials include study guides, documentations, whitepapers, FAQs, sample papers, and more.

• Practice Tests

  The potential candidates can also take practice tests. With the help of the AWS Database Specialty Practice Exam, you will be sure of your preparation. By using this tool, you will be able to find out your weak areas so that you can work on them and fulfill the knowledge gaps. Besides the vendor’s website, you can observe other platforms that provide you with practice tests.

• Training Course

  The candidates can also go for the AWS training programs. So, it is great to know that Amazon offers the opportunity to opt for this preparation variant. Joining this training program will help the applicants gain the skills and knowledge of the exam content.

• Books and Guides

  The books and study guides should be your next step in your preparation guide. You need to find the material that is enriched with updated information.

 

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