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質問 1：
Amazon DynamoDB global tables are being used by a business to power an online gaming game. The game is played by gamers from all around the globe. As the game became popularity, the amount of queries to DynamoDB substantially rose. Recently, gamers have complained about the game's condition being inconsistent between nations. A database professional notices that the ReplicationLatency metric for many replica tables is set to an abnormally high value.
Which strategy will resolve the issue?
A. Configure the primary table to use DynamoDB auto scaling and the replica tables to use manually provisioned capacity.
B. Configure a DynamoDB Accelerator (DAX) cluster on each of the replicas.
C. Configure all replica tables to use DynamoDB auto scaling.
D. Configure the table-level write throughput limit service quota to a higher value.
正解：C
解説: (Pass4Test メンバーにのみ表示されます)
質問 2：
A Database Specialist modified an existing parameter group currently associated with a production Amazon RDS for SQL Server Multi-AZ DB instance. The change is associated with a static parameter type, which controls the number of user connections allowed on the most critical RDS SQL Server DB instance for the company. This change has been approved for a specific maintenance window to help minimize the impact on users.
How should the Database Specialist apply the parameter group change for the DB instance?
A. Reboot the secondary Multi-AZ DB instance
B. Select the option to apply the change immediately
C. Allow the preconfigured RDS maintenance window for the given DB instance to control when the change is applied
D. Apply the change manually by rebooting the DB instance during the approved maintenance window
正解：D
解説: (Pass4Test メンバーにのみ表示されます)
質問 3：
A bank intends to utilize Amazon RDS to host a MySQL database instance. The database should be able to handle high-volume read requests with extremely few repeated queries.
Which solution satisfies these criteria?
A. Create a read replica of the DB instance. Use the read replica to distribute the read traffic.
B. Create an Amazon ElastiCache cluster. Use a lazy loading strategy to populate the cache.
C. Create an Amazon ElastiCache cluster. Use a write-through strategy to populate the cache.
D. Change the DB instance to Multi-AZ with a standby instance in another AWS Region.
正解：A
質問 4：
An ecommerce company uses Amazon DynamoDB as the backend for its payments system. A new regulation requires the company to log all data access requests for financial audits. For this purpose, the company plans to use AWS logging and save logs to Amazon S3 How can a database specialist activate logging on the database?
A. Use AWS CloudTrail to monitor DynamoDB data-plane operations. Create a DynamoDB stream to monitor control-plane operations. Pass the stream to Amazon Kinesis Data Streams. Use that stream as a source for Amazon Kinesis Data Firehose to store the data in an Amazon S3 bucket.
B. Use AWS CloudTrail to monitor DynamoDB control-plane operations. Create a DynamoDB stream to monitor data-plane operations. Pass the stream to Amazon Kinesis Data Streams. Use that stream as a source for Amazon Kinesis Data Firehose to store the data in an Amazon S3 bucket.
C. Use AWS CloudTrail to monitor DynamoDB data-plane and control-plane operations.
D. Create two trails in AWS CloudTrail. Use Trail1 to monitor DynamoDB control-plane operations. Use Trail2 to monitor DynamoDB data-plane operations.
正解：C
解説: (Pass4Test メンバーにのみ表示されます)
質問 5：
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 medium- sized 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 arbitrary Aurora Replica
B. Aurora will not promote an Aurora Replica
C. Aurora will promote the largest-sized Aurora Replica
D. Aurora will promote an Aurora Replica that is of the same size as the primary instance
正解：C
解説: (Pass4Test メンバーにのみ表示されます)
質問 6：
A database specialist wants to ensure that an Amazon Aurora DB cluster is always automatically upgraded to the most recent minor version available. Noticing that there is a new minor version available, the database specialist has issues an AWS CLI command to enable automatic minor version updates. The command runs successfully, but checking the Aurora DB cluster indicates that no update to the Aurora version has been made.
What might account for this? (Choose two.)
A. Configuring automatic upgrades using the AWS CLI is not supported. This must be enabled expressly using the AWS Management Console.
B. Aurora has detected a breaking change in the new minor version and has automatically rejected the upgrade.
C. The AWS CLI command did not include an apply-immediately parameter.
D. Applying minor version upgrades requires sufficient free space.
E. The new minor version has not yet been designated as preferred and requires a manual upgrade.
正解：C,E
解説: (Pass4Test メンバーにのみ表示されます)
質問 7：
A media company hosts a highly available news website on AWS but needs to improve its page load time, especially during very popular news releases. Once a news page is published, it is very unlikely to change unless an error is identified. The company has decided to use Amazon ElastiCache.
What is the recommended strategy for this use case?
A. Use ElastiCache for Redis with write-through and long time to live (TTL)
B. Use ElastiCache for Redis with lazy loading and short time to live (TTL)
C. Use ElastiCache for Memcached with write-through and long time to live (TTL)
D. Use ElastiCache for Memcached with lazy loading and short time to live (TTL)
正解：C
解説: (Pass4Test メンバーにのみ表示されます)
質問 8：
A database specialist is building a system that uses a static vendor dataset of postal codes and related territory information that is less than 1 GB in size. The dataset is loaded into the application's cache at start up. The company needs to store this data in a way that provides the lowest cost with a low application startup time.
Which approach will meet these requirements?
A. Use Amazon Aurora Serverless. Allow the service to spin resources up and down, as needed.
B. Use Amazon DynamoDB in on-demand capacity mode.
C. Use an Amazon RDS DB instance. Shut down the instance once the data has been read.
D. Use Amazon S3 and load the data from flat files.
正解：D
解説: (Pass4Test メンバーにのみ表示されます)
Amazon DynamoDB global tables are being used by a business to power an online gaming game. The game is played by gamers from all around the globe. As the game became popularity, the amount of queries to DynamoDB substantially rose. Recently, gamers have complained about the game's condition being inconsistent between nations. A database professional notices that the ReplicationLatency metric for many replica tables is set to an abnormally high value.
Which strategy will resolve the issue?
A. Configure the primary table to use DynamoDB auto scaling and the replica tables to use manually provisioned capacity.
B. Configure a DynamoDB Accelerator (DAX) cluster on each of the replicas.
C. Configure all replica tables to use DynamoDB auto scaling.
D. Configure the table-level write throughput limit service quota to a higher value.
正解：C
解説: (Pass4Test メンバーにのみ表示されます)
質問 2：
A Database Specialist modified an existing parameter group currently associated with a production Amazon RDS for SQL Server Multi-AZ DB instance. The change is associated with a static parameter type, which controls the number of user connections allowed on the most critical RDS SQL Server DB instance for the company. This change has been approved for a specific maintenance window to help minimize the impact on users.
How should the Database Specialist apply the parameter group change for the DB instance?
A. Reboot the secondary Multi-AZ DB instance
B. Select the option to apply the change immediately
C. Allow the preconfigured RDS maintenance window for the given DB instance to control when the change is applied
D. Apply the change manually by rebooting the DB instance during the approved maintenance window
正解：D
解説: (Pass4Test メンバーにのみ表示されます)
質問 3：
A bank intends to utilize Amazon RDS to host a MySQL database instance. The database should be able to handle high-volume read requests with extremely few repeated queries.
Which solution satisfies these criteria?
A. Create a read replica of the DB instance. Use the read replica to distribute the read traffic.
B. Create an Amazon ElastiCache cluster. Use a lazy loading strategy to populate the cache.
C. Create an Amazon ElastiCache cluster. Use a write-through strategy to populate the cache.
D. Change the DB instance to Multi-AZ with a standby instance in another AWS Region.
正解：A
質問 4：
An ecommerce company uses Amazon DynamoDB as the backend for its payments system. A new regulation requires the company to log all data access requests for financial audits. For this purpose, the company plans to use AWS logging and save logs to Amazon S3 How can a database specialist activate logging on the database?
A. Use AWS CloudTrail to monitor DynamoDB data-plane operations. Create a DynamoDB stream to monitor control-plane operations. Pass the stream to Amazon Kinesis Data Streams. Use that stream as a source for Amazon Kinesis Data Firehose to store the data in an Amazon S3 bucket.
B. Use AWS CloudTrail to monitor DynamoDB control-plane operations. Create a DynamoDB stream to monitor data-plane operations. Pass the stream to Amazon Kinesis Data Streams. Use that stream as a source for Amazon Kinesis Data Firehose to store the data in an Amazon S3 bucket.
C. Use AWS CloudTrail to monitor DynamoDB data-plane and control-plane operations.
D. Create two trails in AWS CloudTrail. Use Trail1 to monitor DynamoDB control-plane operations. Use Trail2 to monitor DynamoDB data-plane operations.
正解：C
解説: (Pass4Test メンバーにのみ表示されます)
質問 5：
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 medium- sized 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 arbitrary Aurora Replica
B. Aurora will not promote an Aurora Replica
C. Aurora will promote the largest-sized Aurora Replica
D. Aurora will promote an Aurora Replica that is of the same size as the primary instance
正解：C
解説: (Pass4Test メンバーにのみ表示されます)
質問 6：
A database specialist wants to ensure that an Amazon Aurora DB cluster is always automatically upgraded to the most recent minor version available. Noticing that there is a new minor version available, the database specialist has issues an AWS CLI command to enable automatic minor version updates. The command runs successfully, but checking the Aurora DB cluster indicates that no update to the Aurora version has been made.
What might account for this? (Choose two.)
A. Configuring automatic upgrades using the AWS CLI is not supported. This must be enabled expressly using the AWS Management Console.
B. Aurora has detected a breaking change in the new minor version and has automatically rejected the upgrade.
C. The AWS CLI command did not include an apply-immediately parameter.
D. Applying minor version upgrades requires sufficient free space.
E. The new minor version has not yet been designated as preferred and requires a manual upgrade.
正解：C,E
解説: (Pass4Test メンバーにのみ表示されます)
質問 7：
A media company hosts a highly available news website on AWS but needs to improve its page load time, especially during very popular news releases. Once a news page is published, it is very unlikely to change unless an error is identified. The company has decided to use Amazon ElastiCache.
What is the recommended strategy for this use case?
A. Use ElastiCache for Redis with write-through and long time to live (TTL)
B. Use ElastiCache for Redis with lazy loading and short time to live (TTL)
C. Use ElastiCache for Memcached with write-through and long time to live (TTL)
D. Use ElastiCache for Memcached with lazy loading and short time to live (TTL)
正解：C
解説: (Pass4Test メンバーにのみ表示されます)
質問 8：
A database specialist is building a system that uses a static vendor dataset of postal codes and related territory information that is less than 1 GB in size. The dataset is loaded into the application's cache at start up. The company needs to store this data in a way that provides the lowest cost with a low application startup time.
Which approach will meet these requirements?
A. Use Amazon Aurora Serverless. Allow the service to spin resources up and down, as needed.
B. Use Amazon DynamoDB in on-demand capacity mode.
C. Use an Amazon RDS DB instance. Shut down the instance once the data has been read.
D. Use Amazon S3 and load the data from flat files.
正解：D
解説: (Pass4Test メンバーにのみ表示されます)
Obata -
無事DBS-C01合格です。Pass4Testおかげです。短時間内に受験したい人におすすめだな。