DVA-C02 Questions Bank

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Question 84

A developer is designing a fault-tolerant environment where client sessions will be saved.

How can the developer ensure that no sessions are lost if an Amazon EC2 instance fails?

Options:

Use sticky sessions with an Elastic Load Balancer target group.

Use Amazon SOS to save session data.

Use Amazon DynamoDB to perform scalable session handling.

Use Elastic Load Balancer connection draining to stop sending requests to failing instances.

Question 85

An Amazon Kinesis Data Firehose delivery stream is receiving customer data that contains personally identifiable information. A developer needs to remove pattern-based customer identifiers from the data and store the modified data in an Amazon S3 bucket.

What should the developer do to meet these requirements?

Options:

Implement Kinesis Data Firehose data transformation as an AWS Lambda function. Configure the function to remove the customer identifiers. Set an Amazon S3 bucket as the destination of the delivery stream.

Launch an Amazon EC2 instance. Set the EC2 instance as the destination of the delivery stream. Run an application on the EC2 instance to remove the customer identifiers. Store the transformed data in an Amazon S3 bucket.

Create an Amazon OpenSearch Service instance. Set the OpenSearch Service instance as the destination of the delivery stream. Use search and replace to remove the customer identifiers. Export the data to an Amazon S3 bucket.

Create an AWS Step Functions workflow to remove the customer identifiers. As the last step in the workflow, store the transformed data in an Amazon S3 bucket. Set the workflow as the destination of the delivery stream.

Question 86

An application interacts with Amazon Aurora to store and track customer information. The primary database is set up with multiple read replicas for improving the performance of the read queries. However, one of the Aurora replicas is receiving most or all of the traffic, while the other Aurora replica remains idle.

How can this issue be resolved?

Options:

Disable application-level DNS caching.

Enable application-level DNS caching.

Enable application pooling.

Disable application pooling.

Question 87

A developer needs to deploy an application running on AWS Fargate using Amazon ECS The application has environment variables that must be passed to a container for the application to initialize.

How should the environment variables be passed to the container?