DBS-C01 Free Practice Test

A company developed an AWS CloudFormation template used to create all new Amazon DynamoDB tables in its AWS account. The template configures provisioned throughput capacity using hard-coded values. The company wants to change the template so that the tables it creates in the future have independently configurable read and write capacity units assigned.
Which solution will enable this change?

1. A. Add values for the rcuCount and wcuCount parameters to the Mappings section of the template.ConfigureDynamoDB to provision throughput capacity using the stack’s mappings.
2. B. Add values for two Number parameters, rcuCount and wcuCount, to the templat
3. C. Replace the hard-codedvalues with calls to the Ref intrinsic function, referencing the new parameters.
4. D. Add values for the rcuCount and wcuCount parameters as outputs of the templat
5. E. Configure DynamoDBto provision throughput capacity using the stack outputs.
6. F. Add values for the rcuCount and wcuCount parameters to the Mappings section of the template.Replacethe hard-coded values with calls to the Ref intrinsic function, referencing the new parameters.

Correct Answer: B

A company maintains several databases using Amazon RDS for MySQL and PostgreSQL. Each RDS database generates log files with retention periods set to their default values. The company has now mandated that database logs be maintained for up to 90 days in a centralized repository to facilitate real-time and after-the-fact analyses.
What should a Database Specialist do to meet these requirements with minimal effort?

1. A. Create an AWS Lambda function to pull logs from the RDS databases and consolidate the log files in an Amazon S3 bucke
2. B. Set a lifecycle policy to expire the objects after 90 days.
3. C. Modify the RDS databases to publish log to Amazon CloudWatch Log
4. D. Change the log retention policy for each log group to expire the events after 90 days.
5. E. Write a stored procedure in each RDS database to download the logs and consolidate the log files in an Amazon S3 bucke
6. F. Set a lifecycle policy to expire the objects after 90 days.
7. G. Create an AWS Lambda function to download the logs from the RDS databases and publish the logs to Amazon CloudWatch Log
8. H. Change the log retention policy for the log group to expire the events after 90 days.

Correct Answer: A

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?

1. A. Amazon DocumentDB
2. B. Amazon RDS Multi-AZ deployment
3. C. Amazon DynamoDB global table
4. D. Amazon Aurora Global Database

Correct Answer: C

A company is using Amazon with Aurora Replicas for read-only workload scaling. A Database Specialist needs to split up two read-only applications so each application always connects to a dedicated replica. The Database Specialist wants to implement load balancing and high availability for the read-only applications.
Which solution meets these requirements?

1. A. Use a specific instance endpoint for each replica and add the instance endpoint to each read-onlyapplication connection string.
2. B. Use reader endpoints for both the read-only workload applications.
3. C. Use a reader endpoint for one read-only application and use an instance endpoint for the other read-onlyapplication.
4. D. Use custom endpoints for the two read-only applications.

Correct Answer: B

A user has a non-relational key-value database. The user is looking for a fully managed AWS service that will offload the administrative burdens of operating and scaling distributed databases. The solution must be cost-effective and able to handle unpredictable application traffic.
What should a Database Specialist recommend for this user?

1. A. Create an Amazon DynamoDB table with provisioned capacity mode
2. B. Create an Amazon DocumentDB cluster
3. C. Create an Amazon DynamoDB table with on-demand capacity mode
4. D. Create an Amazon Aurora Serverless DB cluster

Correct Answer: C