DBS-C01 Übungsmaterialien & DBS-C01 Lernführung: AWS Certified Database – Specialty (DBS-C01) Exam & DBS-C01 Lernguide

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Um die AWS Certified Database – Specialty Prüfung zu bestehen, benötigen Sie ein solides Verständnis von Datenbankkonzepten und -architektur, einschließlich Datenmodellierung, Datenbankdesign und Datenbankoptimierung. Sie müssen auch mit verschiedenen Datenbanktechnologien vertraut sein, wie relationale Datenbanken, NoSQL-Datenbanken und Data-Warehousing-Lösungen, und praktische Erfahrung mit AWS-Datenbankservices haben, wie Amazon RDS, Amazon DynamoDB und Amazon Redshift.

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Die AWS Certified Database – Specialty (DBS-C01) Zertifizierungsprüfung ist eine sehr begehrte Zertifizierung, die für Personen konzipiert ist, die ein tiefes Verständnis für AWS-Datenbankservices haben. Diese Zertifizierung validiert die Fähigkeiten und Kenntnisse des Kandidaten in der Gestaltung, Bereitstellung und Verwaltung von AWS-Datenbanklösungen. Die Prüfung deckt ein breites Spektrum an AWS-Datenbankservices ab, einschließlich Amazon RDS, Amazon DynamoDB, Amazon Aurora, Amazon Redshift und Amazon ElastiCache.

Um die DBS-C01 Prüfung abzulegen, müssen Kandidaten mindestens fünf Jahre Erfahrung in Datenbanktechnologien haben, einschließlich mindestens zwei Jahre Erfahrung in der Verwendung von AWS-Services. Sie sollten auch ein starkes Verständnis für Datenmodellierung, Datenbankdesign und Datenbanksicherheit haben. Das Bestehen der Prüfung zeigt, dass ein Kandidat die Fähigkeiten und Kenntnisse hat, um AWS-Datenbanklösungen zu entwerfen und bereitzustellen, die den Anforderungen ihrer Organisation entsprechen.

Amazon AWS Certified Database – Specialty (DBS-C01) Exam DBS-C01 Prüfungsfragen mit Lösungen (Q19-Q24):

19. Frage
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 non-production 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. Use the ssm dynamic reference to retrieve the master password stored in the AWS Systems Manager Parameter Store and enable automatic rotation.
  • B. Encrypt the master password using an AWS KMS key. Store the encrypted master password in the CloudFormation template.
  • C. Store the master password in a parameter file in each environment. Reference the environment-specific parameter file in the CloudFormation template.
  • D. Use the secretsmanager dynamic reference to retrieve the master password stored in AWS Secrets Manager and enable automatic rotation.

Antwort: D

Begründung:
“By using the secure string support in CloudFormation with dynamic references you can better maintain your infrastructure as code. You’ll be able to avoid hard coding passwords into your templates and you can keep these runtime configuration parameters separated from your code. Moreover, when properly used, secure strings will help keep your development and production code as similar as possible, while continuing to make your infrastructure code suitable for continuous deployment pipelines.” https://aws.amazon.com/blogs/mt/using-aws-systems-manager-parameter-store-secure-string-parameters-in-aws-cloudformation-templates/ https://aws.amazon.com/blogs/security/how-to-use-aws-secrets-manager-rotate-credentials-amazon-rds-database-types-oracle/

20. Frage
A company with branch offices in Portland, New York, and Singapore has a three-tier web application that leverages a shared database. The database runs on Amazon RDS for MySQL and is hosted in the us-west-2 Region. The application has a distributed front end deployed in the us-west-2, ap-southheast-1, and us-east-2 Regions.
This front end is used as a dashboard for Sales Managers in each branch office to see current sales statistics.
There are complaints that the dashboard performs more slowly in the Singapore location than it does in Portland or New York. A solution is needed to provide consistent performance for all users in each location.
Which set of actions will meet these requirements?

  • A. Create a new RDS instance in the ap-southeast-1 Region. Use AWS DMS and change data capture (CDC) to update the new instance in the ap-southeast-1 Region. Reconfigure the ap-southeast-1 front-end dashboard to access this instance.
  • B. Take a snapshot of the instance in the us-west-2 Region. Create a new instance from the snapshot in the ap-southeast-1 Region. Reconfigure the ap-southeast-1 front-end dashboard to access this instance.
  • C. Create an RDS read replica in the us-west-2 Region where the primary instance resides. Create a read replica in the ap-southeast-1 Region from the read replica located on the us-west-2 Region. Reconfigure the ap-southeast-1 front-end dashboard to access this instance.
  • D. Create an RDS read replica in the ap-southeast-1 Region from the primary RDS DB instance in the us- west-2 Region. Reconfigure the ap-southeast-1 front-end dashboard to access this instance.

Antwort: D

Begründung:
Explanation
https://aws.amazon.com/rds/features/read-replicas/
“Amazon RDS Read Replicas provide enhanced performance and durability for RDS database (DB) instances.
They make it easy to elastically scale out beyond the capacity constraints of a single DB instance for read-heavy database workloads. You can create one or more replicas of a given source DB Instance and serve high-volume application read traffic from multiple copies of your data, thereby increasing aggregate read throughput. “
https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_ReadRepl.XRgn.html

21. Frage
A financial services organization employs an Amazon Aurora PostgreSQL DB cluster to host an application on AWS. No log files detailing database administrator activity were discovered during a recent examination. A database professional must suggest a solution that enables access to the database and maintains activity logs.
The solution should be simple to implement and have a negligible effect on performance.
Which database specialist solution should be recommended?

  • A. Enable Aurora Database Activity Streams on the database in asynchronous mode. Connect the Amazon Kinesis data stream to Kinesis Data Firehose. Set the Firehose destination to an Amazon S3 bucket.
  • B. Create an AWS CloudTrail trail in the Region where the database runs. Associate the database activity logs with the trail.
  • C. Allow connections to the DB cluster through a bastion host only. Restrict database access to the bastion host and application servers. Push the bastion host logs to Amazon CloudWatch Logs using the CloudWatch Logs agent.
  • D. Enable Aurora Database Activity Streams on the database in synchronous mode. Connect the Amazon Kinesis data stream to Kinesis Data Firehose. Set the Kinesis Data Firehose destination to an Amazon S3 bucket.

Antwort: A

Begründung:
Explanation
https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/DBActivityStreams.Overview.html

22. Frage
A company developed a new application that is deployed on Amazon EC2 instances behind an Application Load Balancer. The EC2 instances use the security group named sg-application-servers. The company needs a database to store the data from the application and decides to use an Amazon RDS for MySQL DB instance. The DB instance is deployed in private DB subnet.
What is the MOST restrictive configuration for the DB instance security group?

  • A. Only allow incoming traffic from the sg-application-servers security group on port 3306.
  • B. Only allow incoming traffic from the sg-application-servers security group on port 443.
  • C. Only allow incoming traffic from the subnet of the application servers on port 3306.
  • D. Only allow incoming traffic from the subnet of the application servers on port 443.

Antwort: B

23. Frage
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 RDS snapshot schedule from the AWS Management Console to take a snapshot every 30 days.
  • B. Create an AWS Lambda function to run on the first day of every month to create an automated RDS snapshot.
  • C. Create an AWS Lambda function to run on the first day of every month to take a manual RDS snapshot.
  • D. 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.

Antwort: D

Begründung:
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

24. Frage
……

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