DBS-C01模擬試験、DBS-C01受験対策

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AWS認定データベース - 専門認定試験は、AWSプラットフォームでデータベースを管理するデータベースの概念と実践的な経験を深く理解している個人を対象としています。候補者は、AWS上のデータベースの管理における少なくとも2年間の経験を含む、データベーステクノロジーでの最低5年の経験が必要です。この試験は、AWSデータベースサービスの専門知識を実証することでキャリアの機会を強化したいと考えているデータベース管理者、建築家、開発者、およびその他のIT専門家に最適です。この認定は、AWSの顧客とパートナーのデータベース関連要件を満たす候補者の能力も検証します。

DBS-C01模擬試験

検証するDBS-C01模擬試験試験-試験の準備方法-実際的なDBS-C01受験対策

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DBS-C01試験では、リレーショナルおよび非関連データベース、データベース設計、展開、移行、管理など、幅広いトピックをカバーしています。この試験では、Amazon RDS、Amazon Aurora、Amazon Dynamodb、Amazon RedshiftなどのAWSサービスに関する候補者の知識もテストしています。

AWS Certified Database - Specialty (DBS-C01)試験に備えるためには、候補者はデータベースの概念を良く理解し、AWSサービスの使用経験があることが望ましいです。AWSは、オンラインコース、練習問題、学習ガイドなど、試験に備えるためのトレーニングとリソースを幅広く提供しています。候補者はAWSサービスのハンズオン経験を積むことによっても利益を得ることができます。また、AWSのイベントやウェビナーに参加することでも役立ちます。

Amazon AWS Certified Database - Specialty (DBS-C01) Exam 認定 DBS-C01 試験問題 (Q28-Q33):

質問 # 28
A company uses a large, growing, and high performance on-premises Microsoft SQL Server instance With an Always On availability group cluster size of 120 TIE. The company uses a third-party backup product that requires system-level access to the databases. The company will continue to use this third-party backup product in the future.
The company wants to move the DB cluster to AWS with the least possible downtime and data loss. The company needs a 2 Gbps connection to sustain Always On asynchronous data replication between the company's data center and AWS.
Which combination of actions should a database specialist take to meet these requirements? (Select THREE.)

A. Grant system-level access to the third-party backup product to perform backups of the Amazon RDS for SQL Server DB instance.
B. Establish an AWS Direct Connect hosted connection between the companfs data center and AWS
C. Use AWS Database Migration Service (AWS DMS) to migrate the on-premises SQL Server databases to Amazon RDS for SQL Server Configure Always On availability groups for SQL Server.
D. Configure the third-party backup product to perform backups of the DB cluster on Amazon EC2.
E. Create an AWS Site-to-Site VPN connection between the companVs data center and AWS over the internet
F. Deploy a new SQL Server Always On availability group DB cluster on Amazon EC2 Configure Always On distributed availability groups between the on-premises DB cluster and the AWS DB cluster_ Fail over to the AWS DB cluster when it is time to migrate.

正解：B、D、F

解説：
Explanation
The best combination of actions to meet the company's requirements are:
A: Establish an AWS Direct Connect hosted connection between the company's data center and AWS.
This will provide a secure and high-bandwidth connection for the Always On data replication and minimize the network latency and data loss.
D: Deploy a new SQL Server Always On availability group DB cluster on Amazon EC2. Configure Always On distributed availability groups between the on-premises DB cluster and the AWS DB cluster.
Fail over to the AWS DB cluster when it is time to migrate. This will allow the company to use the same SQL Server version and edition as on-premises, and leverage the distributed availability group feature to span two separate availability groups across different locations. The failover process will be fast and seamless, with minimal downtime and data loss.
F: Configure the third-party backup product to perform backups of the DB cluster on Amazon EC2. This will enable the company to continue using their existing backup solution, which requires system-level access to the databases. Amazon RDS for SQL Server does not support system-level access, so it is not a suitable option for this requirement.

質問 # 29
A database specialist needs to configure an Amazon RDS for MySQL DB instance to close non-interactive connections that are inactive after 900 seconds.
What should the database specialist do to accomplish this task?

A. Connect to the MySQL database and run the SET SESSION wait_timeout=900 command.
B. Modify the default DB parameter group and set the wait_timeout parameter value to 900.
C. Edit the my.cnf file and set the wait_timeout parameter value to 900. Restart the DB instance.
D. Create a custom DB parameter group and set the wait_timeout parameter value to 900. Associate the DB instance with the custom parameter group.

正解：D

解説：
https://aws.amazon.com/fr/blogs/database/best-practices-for-configuring-parameters-for-amazon-rds-for-mysql-part-3-parameters-related-to-security-operational-manageability-and-connectivity-timeout/
"You can set parameters globally using a parameter group. Alternatively, you can set them for a particular session using the SET command." https://aws.amazon.com/blogs/database/best-practices-for-configuring-parameters-for-amazon-rds-for-mysql-part-1-parameters-related-to-performance/

質問 # 30
Amazon Neptune is being used by a corporation as the graph database for one of its products. During an ETL procedure, the company's data science team produced enormous volumes of temporary data by unintentionally. The Neptune DB cluster extended its storage capacity automatically to handle the added data, but the data science team erased the superfluous data.
What should a database professional do to prevent incurring extra expenditures for cluster volume space that is not being used?

A. Use the AWS CLI to turn on automatic resizing of the cluster volume.
B. Add a Neptune read replica to the cluster. Promote this replica as a new primary DB instance. Reset the storage space of the cluster.
C. Export the cluster data into a new Neptune DB cluster.
D. Take a snapshot of the cluster volume. Restore the snapshot in another cluster with a smaller volume size.

正解：C

解説：
The only way to shrink the storage space used by your DB cluster when you have a large amount of unused allocated space is to export all the data in your graph and then reload it into a new DB cluster. Creating and restoring a snapshot does not reduce the amount of storage allocated for your DB cluster, because a snapshot retains the original image of the cluster's underlying storage.

質問 # 31
A company has a reporting application that runs on an Amazon EC2 instance in an isolated developer account on AWS. The application needs to retrieve data during non-peak company hours from an Amazon Aurora PostgreSQL database that runs in the companys production account The companys security team requires that access to production resources complies with AWS best security practices A database administrator needs to provide the reporting application with access to the production database.
The company has already configured VPC peering between the production account and developer account The company has also updated the route tables in both accounts With the necessary entries to correctly set up VPC peering What must the database administrator do to finish providing connectivity to the reporting application?

A. Add an inbound security group rule to the database security group that allows access from the developer account VPC CIDR on port 5432_ Add an outbound security group rule to the EC2 security group that allows access to the production account VPC CIDR on all TCP ports
B. Add an inbound security group rule to the database security group that allows access from the developer account VPC CIDR on port 5432. Add an outbound security group rule to the EC2 security group that allows access to the production account VPC CIDR on port 5432.
C. Add an outbound security group rule to the database security group that allows access from the developer account VPC CIDR on port 5432. Add an outbound security group rule to the EC2 security group that allows access to the production account VPC CIDR on port 5432.
D. Add an inbound security group rule to the database security group that allows access from the developer account VPC CIDR on all TCP ports. Add an inbound security group rule to the EC2 security group that allows access to the production account VPC CIDR on port 5432_

正解：B

解説：
Explanation
The correct answer is A. Add an inbound security group rule to the database security group that allows access from the developer account VPC CIDR on port 5432.
Add an outbound security group rule to the EC2 security group that allows access to the production account VPC CIDR on port 5432.
The explanation is as follows:
To allow the reporting application to access the production database, the database administrator needs to configure the security group rules for both the database and the EC2 instance. The security group rules must allow traffic between the peered VPCs on the port that the database uses, which is 5432 for PostgreSQL1.
Option A is correct because it adds an inbound rule to the database security group that allows access from the developer account VPC CIDR on port 5432. This means that the database can accept connections from the EC2 instance in the peered VPC. It also adds an outbound rule to the EC2 security group that allows access to the production account VPC CIDR on port 5432. This means that the EC2 instance can initiate connections to the database in the peered VPC.
Option B is incorrect because it adds an outbound rule to the database security group, which is not necessary. The database does not need to initiate connections to the EC2 instance, only accept them. It also does not add an inbound rule to the EC2 security group, which is not required. The EC2 instance does not need to accept connections from the database, only initiate them.
Option C is incorrect because it adds an inbound rule to the database security group that allows access from the developer account VPC CIDR on all TCP ports. This is too permissive and violates the principle of least privilege2. It also adds an inbound rule to the EC2 security group that allows access to the production account VPC CIDR on port 5432. This is unnecessary and does not help with connectivity.
Option D is incorrect because it adds an outbound rule to the EC2 security group that allows access to the production account VPC CIDR on all TCP ports. This is too permissive and violates the principle of least privilege2. It also does not add an outbound rule to the database security group, which is not needed.
References: 1: [Working with PostgreSQL and pgAdmin - Amazon Aurora] 2: [Security best practices in IAM - AWS Identity and Access Management]

質問 # 32
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. Create RDS event subscriptions. Have the tracking systems subscribe to specific RDS event system notifications.
B. 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.
C. 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.
D. 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.

正解：A

質問 # 33
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DBS-C01受験対策: https://www.goshiken.com/Amazon/DBS-C01-mondaishu.html

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