Free Amazon DVA-C02 Exam Questions

Question 1

A Developer has updated an AWS Lambda function and published a new version. To ensure the code is working as expected the Developer needs to initially direct a percentage of traffic to the new version and gradually increase this over time. It is important to be able to rollback if there are any issues reported.

What is the BEST way the Developer can implement the migration to the new version SAFELY?

A : an immutable update with a new ASG to deploy the new version in parallel, following testing cutover to the new version

B : eate an Amazon Route 53 weighted routing policy pointing to the current and new versions, assign a lower weight to the new version

C : eate an Alias, assign the current and new versions and use traffic shifting to assign a percentage of traffic to the new version

D : an Amazon Elastic Load Balancer to direct a percentage of traffic to each target group containing the Lambda function versions

Answer: C

Question 2

A company is developing a new online game that will run on top of Amazon ECS. Four distinct Amazon ECS services will be part of the architecture, each requiring specific permissions to various AWS services. The company wants to optimize the use of the underlying Amazon EC2 instances by bin packing the containers based on memory reservation.

Which configuration would allow the Development team to meet these requirements MOST securely

A : eate four distinct IAM roles, each containing the required permissions for the associated ECS services, then configure each ECS task definition to reference the associated IAM role

B : eate a new Identity and Access Management (IAM) instance profile containing the required permissions for the various ECS services, then associate that instance role with the underlying EC2 instances

C : eate four distinct IAM roles, each containing the required permissions for the associated ECS services, then configure each ECS service to reference the associated IAM role

D : eate four distinct IAM roles, each containing the required permissions for the associated ECS services, then, create an IAM group and configure the ECS cluster to reference that group

Answer: A

Question 3

A Developer needs to scan a full DynamoDB 50GB table within non-peak hours. About half of the strongly consistent RCUs are typically used during non-peak hours and the scan duration must be minimized.

How can the Developer optimize the scan execution time without impacting production workloads?

A : crease the RCUs during the scan operation

B : sequential scans

C : ange to eventually consistent RCUs during the scan operation

D : parallel scans while limiting the rate

Answer: D

Question 4

A company is creating an application that processes csv files from Amazon S3 A developer has created an S3 bucket The developer has also created an AWS Lambda function to process the csv files from the S3 bucket Which combination of steps will invoke the Lambda function when a csv file is uploaded to Amazon S3? (Select TWO.)

A : Create an Amazon EventBridge rule Configure the rule with a pattern to match the S3 object created event

B : Schedule an Amazon EventBridge rule to run a new Lambda function to scan the S3 bucket.

C : Add a trigger to the existing Lambda function. Set the trigger type to EventBridge Select the Amazon EventBridge rule.

D : Create a new Lambda function to scan the S3 bucket for recently added S3 objects

E : Add S3 Lifecycle rules to invoke the existing Lambda function

Answer: A,C

Question 5

An ecommerce startup is preparing for an annual sales event. As the traffic to the company's application increases, the development team wants to be notified when the Amazon EC2 instance's CPU utilization exceeds 80%. Which solution will meet this requirement?

A : Create a custom Amazon CloudWatch alarm that sends a notification to an Amazon SNS topic when the CPU utilization exceeds 80%.

B : Create a custom AWS CloudTrail alarm that sends a notification to an Amazon SNS topic when the CPU utilization exceeds 80%.

C : Create a cron job on the EC2 instance that invokes the --describe-instance-information command on the host instance every 15 minutes and sends the results to an Amazon SNS topic.

D : Create an AWS Lambda function that queries the AWS CloudTrail logs for the CPUUtilization metric every 15 minutes and sends a notification to an Amazon SNS topic when the CPU utilization exceeds 80%.

Answer: A