A company uses Amazon DynamoDB as the data store for its ecommerce website. The website receives little to no traffic at night, and the majority of the traffic occurs during the day. The traffic growth during peak hours is gradual and predictable on a daily basis, but it can be orders of magnitude higher than during off-peak hours.
The company initially provisioned capacity based on its average volume during the day without accounting for the variability in traffic patterns. However, the website is experiencing a significant amount of throttling during peak hours. The company wants to reduce the amount of throttling while minimizing costs.
What should a database specialist do to meet these requirements?

• A.Use on-demand capacity.
• B.Use provisioned capacity. Create an AWS Application Auto Scaling policy to update capacity based on consumption.
• C.Use reserved capacity. Set it to the capacity levels required for peak daytime throughput.
• D.Use provisioned capacity. Set it to the capacity levels required for peak daytime throughput.

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A company is using AWS CloudFormation to provision and manage infrastructure resources, including a production database. During a recent CloudFormation stack update, a database specialist observed that changes were made to a database resource that is named ProductionDatabase. The company wants to prevent changes to only ProductionDatabase during future stack updates.
Which stack policy will meet this requirement?

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• C.
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A Database Specialist has migrated an on-premises Oracle database to Amazon Aurora PostgreSQL. The schema and the data have been migrated successfully. The on-premises database server was also being used to run database maintenance cron jobs written in Python to perform tasks including data purging and generating data exports. The logs for these jobs show that, most of the time, the jobs completed within 5 minutes, but a few jobs took up to 10 minutes to complete. These maintenance jobs need to be set up for Aurora PostgreSQL.
How can the Database Specialist schedule these jobs so the setup requires minimal maintenance and provides high availability?

• A.Connect to the Aurora host and create cron jobs to run the maintenance jobs following the requiredschedule.
• B.Create the maintenance job using the Amazon CloudWatch job scheduling plugin.
• C.Create cron jobs on an Amazon EC2 instance to run the maintenance jobs following the required schedule.
• D.Create AWS Lambda functions to run the maintenance jobs and schedule them with Amazon CloudWatchEvents.

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A financial company has allocated an Amazon RDS MariaDB DB instance with large storage capacity to accommodate migration efforts. Post-migration, the company purged unwanted data from the instance. The company now want to downsize storage to save money. The solution must have the least impact on production and near-zero downtime.
Which solution would meet these requirements?

• A.Create a new RDS DB instance with the required storage and move the databases from the old instancesto the new instance using AWS DMS
• B.Create a snapshot of the old databases and restore the snapshot with the required storage
• C.Create a new read replica and make it the primary by terminating the existing primary
• D.Create a new database using native backup and restore

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A company wants to improve its ecommerce website on AWS. A database specialist decides to add Amazon ElastiCache for Redis in the implementation stack to ease the workload off the database and shorten the website response times. The database specialist must also ensure the ecommerce website is highly available within the company's AWS Region.
How should the database specialist deploy ElastiCache to meet this requirement?

• A.Launch an ElastiCache for Redis cluster using the AWS CLI with the -cluster-enabled switch.
• B.Launch an ElastiCache for Redis cluster and select read replicas in different Availability Zones.
• C.Launch two ElastiCache for Redis clusters in two different Availability Zones. Configure Redis streams to replicate the cache from the primary cluster to another.
• D.Launch an ElastiCache cluster in the primary Availability Zone and restore the cluster's snapshot to a different Availability Zone during disaster recovery.

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