A team of Developers must migrate an application running inside an AWS Elastic Beanstalk environment from a Classic Load Balancer to an Application Load Balancer.
Which steps should be taken to accomplish the task using the AWS Management Console?
A. 1. Update the application code in the existing deployment.
2.
Select a new load balancer type before running the deployment.
3.
Deploy the new version of the application code to the environment.
B. 1. Create a new environment with the same configurations except for the load balancer type.
2.
Deploy the same application version as used in the original environment.
3.
Run the swap-environment-cnames action.
C. 1. Clone the existing environment, changing the associated load balancer type.
2.
Deploy the same application version as used in the original environment.
3.
Run the swap-environment-cnames action.
D. 1. Edit the environment definitions in the existing deployment.
2.
Change the associated load balancer type according to the requirements.
3.
Rebuild the environment with the new load balancer type.
A Developer is creating an application that needs to locate the public IPv4 address of the Amazon EC2 instance on which it runs. How can the application locate this information?
A. Get the instance metadata by retrieving http://169.254.169.254/latest/metadata/.
B. Get the instance user data by retrieving http://169.254.169.254/latest/userdata/.
C. Get the application to run IFCONFIG to get the public IP address.
D. Get the application to run IPCONFIG to get the public IP address.
A company has a multi-tiered web application on AWS. During a recent spike in traffic, one of the primary relational databases on Amazon RDS could not serve all the traffic. Some read queries for repeatedly accessed items failed, so users received error messages.
What can be done to minimize the impact on database read queries MOST efficiently during future traffic spikes?
A. Use Amazon S3 to cache database query results.
B. Use Amazon RDS as a custom origin for Amazon CloudFront.
C. Use local storage and memory on Amazon EC2 instances to cache data.
D. Use Amazon ElastiCache in front of the primary database to cache data.
A company maintains a REST service using Amazon API Gateway and the API Gateway native API key validation. The company recently launched a new registration page, which allows users to sign up for the service. The registration page creates a new API key using CreateApiKey and sends the new key to the user. When the user attempts to call the API using this key, the user receives a 403 Forbidden error. Existing users are unaffected and can still call the API.
What code updates will grant these new users access to the API?
A. The createDeployment method must be called so the API can be redeployed to include the newly created API key.
B. The updateAuthorizer method must be called to update the API's authorizer to include the newly created API key.
C. The importApiKeys method must be called to import all newly created API keys into the current stage of the API.
D. The createUsagePlanKey method must be called to associate the newly created API key with the correct usage plan.
When a Simple Queue Service message triggers a task that takes 5 minutes to complete, which process below will result in successful processing of the message and remove it from the queue while minimizing the chances of duplicate processing?
A. Retrieve the message with an increased visibility timeout, process the message, delete the message from the queue
B. Retrieve the message with an increased visibility timeout, delete the message from the queue, process the message
C. Retrieve the message with increased DelaySeconds, process the message, delete the message from the queue
D. Retrieve the message with increased DelaySeconds, delete the message from the queue, process the message
An on-premises application is implemented using a Linux, Apache, MySQL and PHP (LAMP) stack. The Developer wants to run this application in AWS.
Which of the following sets of AWS services can be used to run this stack?
A. Amazon API Gateway, Amazon S3
B. AWS Lambda, Amazon DynamoDB
C. Amazon EC2, Amazon Aurora
D. Amazon Cognito, Amazon RDS
E. Amazon ECS, Amazon EBS
A Lambda function is packaged for deployment to multiple environments, including development, test, production, etc. Each environment has unique set of resources such as databases, etc.
How can the Lambda function use the resources for the current environment?
A. Apply tags to the Lambda functions.
B. Hardcore resources in the source code.
C. Use environment variables for the Lambda functions.
D. Use separate function for development and production.
A Developer is building a mobile application and needs any update to user profile data to be pushed to all devices accessing the specific identity. The Developer does not want to manage a back end to maintain the user profile data. What is the MOST efficient way for the Developer to achieve these requirements using Amazon Cognito?
A. Use Cognito federated identities.
B. Use a Cognito user pool.
C. Use Cognito Sync.
D. Use Cognito events.
A meteorological system monitors 600 temperature gauges, obtaining temperature samples every minute and saving each sample to a DynamoDB table. Each sample involves writing 1K of data and the writes are evenly distributed over time.
How much write throughput is required for the target table?
A. 1 write capacity unit
B. 10 write capacity units
C. 60 write capacity units
D. 600 write capacity units
E. 3600 write capacity units
A Developer wants to enable AWS X-Ray for a secure application that runs in an Amazon ECS environment. What combination of steps will enable X-Ray? (Select THREE.)
A. Create a Docker image that runs the X-Ray daemon.
B. Add instrumentation to the application code for X-Ray.
C. Install the X-Ray daemon on the underlying EC2 instance.
D. Configure and use an IAM EC2 instance role.
E. Register the application with X-Ray.
F. Configure and use an IAM role for tasks.
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