AWS DVA-C01 :: Practice Exam5

You are a developer working at a cloud company that embraces serverless. You have performed your initial deployment and would like to work towards adding API Gateway stages and associate them with existing deployments. Your stages will include prod, test, and dev and will need to match a Lambda function variant that can be updated over time. Which of the following features must you add to achieve this? (select two). Lambda X-RAY integration. Lambda Aliases. Lambda Versions. Mapping Templates. Stage Variables.

An e-commerce company has a fleet of EC2 based web servers running into very high CPU utilization issues. The development team has determined that serving secure traffic via HTTPS is a major contributor to the high CPU load. Which of the following steps can take the high CPU load off the web servers? (Select two). Configure an SSL/TLS certificate on an Application Load Balancer via AWS Certificate Manager (ACM). Create an HTTPS listener on the Application Load Balancer with SSL pass-through. Create an HTTP listener on the Application Load Balancer with SSL termination.

AWS CloudFormation helps model and provision all the cloud infrastructure resources needed for your business. Which of the following services rely on CloudFormation to provision resources (Select two)?. CodeBuild. Lambda. Elastic Beanstalk. Autoscaling. Serverless Application Model (AWS SAM).

As an AWS Certified Developer Associate, you have been hired to consult with a company that uses the NoSQL database for mobile applications. The developers are using DynamoDB to perform operations such as GetItem but are limited in knowledge. They would like to be more efficient with retrieving some attributes rather than all. Which of the following recommendations would you provide?. use a Scan. use a FilterExpression. use the --query parameter. specify a ProjectionExpression.

Your e-commerce company needs to improve its software delivery process and is moving away from the waterfall methodology. You decided that every application should be built using the best CI/CD practices and every application should be packaged and deployed as a Docker container. The Docker images should be stored in ECR and pushed with AWS CodePipeline and AWS CodeBuild. When you attempt to do this, the last step fails with an authorization issue. What is the most likely issue?. CodeBuild cannot talk to ECR because of security group issues. The IAM permissions are wrong for the CodeBuild service. The ECR repository is stale, you must delete and re-create it. The ECS instances are misconfigured and must contain additional data in /etc/ecs/ecs.config.

The development team at an IT company has configured an Application Load Balancer (ALB) with a Lambda function A as the target but the Lambda function A is not able to process any request from the ALB. Upon investigation, the team finds that there is another Lambda function B in the AWS account that is exceeding the concurrency limits. How can the development team address this issue?. Set up reserved concurrency for the Lambda function B so that it throttles if it goes above a certain concurrency limit. Use an API Gateway instead of an Application Load Balancer for Lambda function A. Set up provisioned concurrency for the Lambda function B so that it throttles if it goes above a certain concurrency limit. Use a Cloudfront Distribution instead of an Application Load Balancer for Lambda function A.

A team lead has asked you to create an AWS CloudFormation template that creates EC2 instances and RDS databases. The template should be reusable by allowing the user to input a parameter value for an Amazon EC2 AMI ID. Which of the following intrinsic function should you choose to reference the parameter?. !GetAtt. !Join. !Param. !Ref.

A multi-national company maintains separate AWS accounts for different verticals in their organization. The project manager of a team wants to migrate the Elastic Beanstalk environment from Team A's AWS account into Team B's AWS account. As a Developer, you have been roped in to help him in this process. Which of the following will you suggest?. It's not possible to migrate EB environment from one AWS account to the other. Create a saved config in Team A's account and configure it to Export. Now, log into Team's B's account and choose the Import option. Here, you need to specify the name of the saved config and allow the system to create the new application. This takes a little time based on the regions the two accounts belong to. Create an export configuration from EB console from Team A's account and download it to your local machine. Make the account-specific parameter changes and upload to the S3 bucket in Team B's account. From EB console, create an app from 'Saved Configurations'.

You are getting ready for an event to show off your Alexa skill written in JavaScript. As you are testing your voice activation commands you find that some intents are not invoking as they should and you are struggling to figure out what is happening. You included the following code console.log(JSON.stringify(this.event)) in hopes of getting more details about the request to your Alexa skill. You would like the logs stored in an Amazon Simple Storage Service (S3) bucket named MyAlexaLog. How do you achieve this?. Use CloudWatch integration feature with Glue. Use CloudWatch integration feature with Lambda. Use CloudWatch integration feature with S3. Use CloudWatch integration feature with Kinesis.

You are working for a technology startup building web and mobile applications. You would like to pull Docker images from the ECR repository called demo so you can start running local tests against the latest application version. Which of the following commands must you run to pull existing Docker images from ECR? (Select two). docker build -t 1234567890.dkr.ecr.eu-west-1.amazonaws.com/demo:latest. docker pull 1234567890.dkr.ecr.eu-west-1.amazonaws.com/demo:latest. $(aws ecr get-login --no-include-email). docker login -u $AWS_ACCESS_KEY_ID -p $AWS_SECRET_ACCESS_KEY. aws docker push 1234567890.dkr.ecr.eu-west-1.amazonaws.com/demo:latest.

A multi-national enterprise uses AWS Organizations to manage its users across different divisions. Even though CloudTrail is enabled on the member accounts, managers have noticed that access issues to CloudTrail logs across different divisions and AWS Regions is becoming a bottleneck in troubleshooting issues. They have decided to use the organization trail to keep things simple. What are the important points to remember when configuring an organization trail? (Select two). Member accounts will be able to see the Organization trail, but cannot modify or delete it. by default, CloudTrail tracks only bucket-level actions. To track object-level actions, you need to enable S3 data events. by default, CloudTrail event log files are not encrypted. There is nothing called Organization Trail. The master account can, however, enable CloudTrail logging, to keep track of all activities across AWS accounts.

Your company has embraced cloud-native microservices architectures. New applications must be dockerized and stored in a registry service offered by AWS. The architecture should support dynamic port mapping and support multiple tasks from a single service on the same container instance. All services should run on the same EC2 instance. Which of the following options offers the best-fit solution for the given use-case?. Classic Load Balancer + Beanstalk. Aplication Load Balancer + ECS. Aplication Load Balancer + Beanstalk. Classic Load Balancer + ECS.

A development team at a social media company uses AWS Lambda for its serverless stack on AWS Cloud. For a new deployment, the Team Lead wants to send only a certain portion of the traffic to the new Lambda version. In case the deployment goes wrong, the solution should also support the ability to roll back to a previous version of the Lambda function, with MIMINUM downtime for the application. As a Developer Associate, which of the following options would you recommend to address this use-case?. Set up the application to use an alias that points to the current version. Deploy the new version of the code and configure the alias to send 10% of the users to this new version. If the deployment goes wrong, reset the alias to point all traffic to the current version. Set up the application to use an alias that points to the current version. Deploy the new version of the code and configure alias to send all users to this new version. If the deployment goes wrong, reset the alias to point to the current version. Set up the application to directly deploy the new Lambda version. If the deployment goes wrong, reset the application back to the current version using the version number in the ARN. Set up the application to have multiple alias of the Lambda function. Deploy the new version of the code. Configure a new alias that points to the current alias of the Lambda function for handling 10% of the traffic. If the deployment goes wrong, reset the new alias to point all traffic to the most recent working alias of the Lambda function.

A popular mobile app retrieves data from an AWS DynamoDB table that was provisioned with read-capacity units (RCU’s) that are evenly shared across four partitions. One of those partitions is receiving more traffic than the other partitions, causing hot partition issues. What technology will allow you to reduce the read traffic on your AWS DynamoDB table with minimal effort?. DynamoDB DAX. DynamoDB Streams. ElastiCache. More partitions.

A company has AWS Lambda functions where each is invoked by other AWS services such as Amazon Kinesis Data Firehose, Amazon API Gateway, Amazon Simple Storage Service, or Amazon CloudWatch Events. What these Lambda functions have in common is that they process heavy workloads such as big data analysis, large file processing, and statistical computations. What should you do to improve the performance of your AWS Lambda functions without changing your code?. Increase the RAM assigned to your Lambda function. Change the instance type for your Lambda function. Change your Lambda function runtime to use Golang. Increase the Lambda function timeout.