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NEW QUESTION 47
A manufacturing company's website uses an Amazon Aurora PostgreSQL DB cluster.
Which configurations will result in the LEAST application downtime during a failover? (Choose three.)

• A. Set Java DNS caching timeouts to a high value.
• B. Set TCP keepalive parameters to a high value.
• C. Set JDBC connection string timeout variables to a low value.
• D. Create an Amazon CloudWatch alert triggering a restore in another Availability Zone when the primary Aurora DB cluster is unreachable.
• E. Use the provided read and write Aurora endpoints to establish a connection to the Aurora DB cluster.
• F. Edit and enable Aurora DB cluster cache management in parameter groups.

Answer: D,E,F

NEW QUESTION 48
A clothing company uses a custom ecommerce application and a PostgreSQL database to sell clothes to thousands of users from multiple countries. The company is migrating its application and database from its on premises data center to the AWS Cloud. The company has selected Amazon EC2 for the application and Amazon RDS for PostgreSQL for the database. The company requires database passwords to be changed every 60 days. A Database Specialist needs to ensure that the credentials used by the web application to connect to the database are managed securely.
Which approach should the Database Specialist take to securely manage the database credentials?

• A. Store the credentials in AWS Secrets Manager. Restrict permissions on the secret to only the IAM role associated with the instance profile. Modify the application to retrieve the credentials from Secrets Manager on start up. Configure the rotation interval to 60 days.
• B. Configure IAM database authentication for the application to connect to the database. Create an IAM user and map it to a separate database user for each ecommerce user. Require users to update their passwords every 60 days.
• C. Store the credentials in a text file in an Amazon S3 bucket. Restrict permissions on the bucket to the IAM role associated with the instance profile only. Modify the application to download the text file and retrieve the credentials on start up. Update the text file every 60 days.
• D. Store the credentials in an encrypted text file in the application AMI. Use AWS KMS to store the key for decrypting the text file. Modify the application to decrypt the text file and retrieve the credentials on start up. Update the text file and publish a new AMI every 60 days.

Answer: B

NEW QUESTION 49
A gaming company uses Amazon Aurora Serverless for one of its internal applications. The company's developers use Amazon RDS Data API to work with the Aurora Serverless DB cluster. After a recent security review, the company is mandating security enhancements. A database specialist must ensure that access to RDS Data API is private and never passes through the public internet.
What should the database specialist do to meet this requirement?

• A. Modify the Aurora Serverless cluster by selecting a VPC with private subnets.
• B. Modify the Aurora Serverless cluster by unchecking the publicly accessible option.
• C. Create a gateway VPC endpoint for RDS Data API.
• D. Create an interface VPC endpoint that uses AWS PrivateLink for RDS Data API.

Answer: D

Explanation:
https://aws.amazon.com/about-aws/whats-new/2020/02/amazon-rds-data-api-now-supports-aws-privatelink/

NEW QUESTION 50
A Database Specialist is designing a new database infrastructure for a ride hailing application. The application data includes a ride tracking system that stores GPS coordinates for all rides. Real-time statistics and metadata lookups must be performed with high throughput and microsecond latency. The database should be fault tolerant with minimal operational overhead and development effort.
Which solution meets these requirements in the MOST efficient way?

• A. Use Amazon Aurora MySQL as the database and use Aurora's buffer cache
• B. Use Amazon RDS for MySQL as the database and use Amazon ElastiCache
• C. Use Amazon DynamoDB as the database and use Amazon API Gateway
• D. Use Amazon DynamoDB as the database and use DynamoDB Accelerator

Answer: C

NEW QUESTION 51
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