Free Amazon DVA-C02 Exam Questions

Question 1

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?

A : Use sticky sessions with an Elastic Load Balancer target group.

B : Use Amazon SOS to save session data.

C : Use Amazon DynamoDB to perform scalable session handling.

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

Answer: C

Question 2

A company ' s application uses an Amazon API Gateway REST API and AWS Lambda functions to uploadmedia files to and fetch media files from a standard Amazon S3 Standard bucket. The company runs a nightlyjob on an Amazon EC2 instance to create dashboards and other visualizations for application users. The jobusually runs for 1 to 2 hours.A developer observes request throttling while the function is running. The application generates multiple 429exceptions in the Lambda function logs when files do not process successfully. The developer needs toresolve the issue and ensure that all of the application ingests all files.Which solution will meet these requirements?

A : Enable S3 Transfer Acceleration on the bucket. Use the appropriate endpoint.

B : Call the CreateMultipartUpload API in the Lambda functions to upload the files in pieces.

C : Implement the retry with a backoff pattern in the Lambda functions.

D : Set up an S3 Lifecycle policy to automatically move the media files to the S3 Intelligent-Tiering storageclass.

Answer: C

Question 3

A developer is building an event-driven application that uses AWS Lambda functions and an Amazon SQSqueue to handle Amazon S3 events and to perform additional processing. A parsing Lambda functionimplements business logic to parse each S3 event. The parsing function sends events on to an SQS queue. Aprocessing Lambda function retrieves messages from the SQS queue and processes them.During an isolated test, the developer observes that both Lambda functions work as expected for mock testevents. However, when the test presents production S3 events to the functions, the developer observes that thenumber of messages in the SQS queue increases. The developer does not find any Amazon CloudWatch logsfor the processing Lambda function when the processing function is presented with production S3 events. Thedeveloper does find logs for test events.The developer must resolve these issues and ensure that the Lambda functions process production S3 eventscorrectly.Which solution will meet these requirements?

A : Configure the SQS queue as a trigger for the processing Lambda function.

B : Configure the SQS queue as a trigger for the parsing Lambda function.

C : Grant the processing Lambda function permissions to access the SQS queue.

D : Grant the processing Lambda function permissions to send logs to CloudWatch.

Answer: A

Question 4

A company caches session information for a web application in an Amazon DynamoDB table. The companywants an automated way to delete old items from the table.What is the simplest way to do this?

A : Write a script that deletes old records; schedule the script as a cron job on an Amazon EC2 instance.

B : Add an attribute with the expiration time; enable the Time To Live feature based on that attribute.

C : Each day, create a new table to hold session data; delete the previous day ' s table.

D : Add an attribute with the expiration time; name the attribute ItemExpiration.

Answer: B

Question 5

A developer is writing an application for a company. The application will be deployed on Amazon EC2 and will use an Amazon RDS for Microsoft SQL Server database. The company's security team requires that database credentials are rotated at least weekly.

How should the developer configure the database credentials for this application?

A : eate a database user. Store the user name and password in an AWS Systems Manager Parameter Store secure string parameter. Enable rotation of the AWS Key Management Service (AWS KMS) key that is used to encrypt the parameter.

B : able IAM authentication for the database. Create a database user for use with IAM authentication. Enable password rotation.

C : eate a database user. Store the user name and password in an AWS Secrets Manager secret that has daily rotation enabled.

D : the EC2 user data to create a database user. Provide the user name and password in environment variables to the application.

Answer: C