A company is using AWS CloudFormation templates to deploy AWS resources. The company needs to update one of its AWS CloudFormation stacks. What can the company do to find out how the changes will impact the resources that are running?
A. Investigate the change sets.
B. Investigate the stack policies.
C. Investigate the Metadata section.
D. Investigate the Resources section.
A developer has built an application using Amazon Cognito for authentication and authorization. After a user is successfully logged in to the application, the application creates a user record in an Amazon DynamoDB table. What is the correct flow to authenticate the user and create a record in the DynamoDB table?
A. Authenticate and get a token from an Amazon Cognito user pool. Use the token to access DynamoDB.
B. Authenticate and get a token from an Amazon Cognito identity pool. Use the token to access DynamoDB.
C. Authenticate and get a token from an Amazon Cognito user pool. Exchange the token for AWS credentials with an Amazon Cognito identity pool. Use the credentials to access DynamoDB.
D. Authenticate and get a token from an Amazon Cognito identity pool. Exchange the token for AWS credentials with an Amazon Cognito user pool. Use the credentials to access DynamoDB.
A developer wants to secure sensitive configuration data such as passwords, database strings, and application license codes. Access to this sensitive information must be tracked for future audit purposes. Where should the sensitive information be stored, adhering to security best practices and operational requirements?
A. In an encrypted file on the source code bundle; grant the application access with Amazon IAM
B. In the Amazon EC2 Systems Manager Parameter Store; grant the application access with IAM
C. On an Amazon EBS encrypted volume; attach the volume to an Amazon EC2 instance to access the data
D. As an object in an Amazon S3 bucket; grant an Amazon EC2 instance access with an IAM role
A developer is creating a serverless web application and maintains different branches of code. The developer wants to avoid updating the Amazon API Gateway target endpoint each time a new code push is performed. What solution would allow the developer to perform a code push efficiently, without the need to update the API Gateway?
A. Associate different AWS Lambda functions to an API Gateway target endpoint.
B. Create different stages in API Gateway, then associate API Gateway with AWS Lambda.
C. Create aliases and versions in AWS Lambda.
D. Tag the AWS Lambda functions with different names.
A developer has designed a customer-facing application that is running on an Amazon EC2 instance. The application logs every request made to it. The application usually runs seamlessly, but a spike in traffic generates several logs that cause the disk to fill up and eventually run out of memory. Company policy requires old logs to be centralized for analysis.
Which long-term solution should the developer employ to prevent the issue from reoccurring?
A. Set up log rotation to rotate the file every day. Also set up log rotation to rotate after every 100 MB and compress the file.
B. Install the Amazon CloudWatch agent on the instance to send the logs to CloudWatch. Delete the logs from the instance once they are sent to CloudWatch.
C. Enable AWS Auto Scaling on Amazon Elastic Block Store (Amazon EBS) to automatically add volumes to the instance when it reaches a specified threshold.
D. Create an Amazon EventBridge (Amazon CloudWatch Events) rule to pull the logs from the instance. Configure the rule to delete the logs after they have been pulled.
A company processes incoming documents from an Amazon S3 bucket. Users upload documents to an S3 bucket using a web user interface. Upon receiving files in S3, an AWS Lambda function is invoked to process the files, but the Lambda function times out intermittently.
If the Lambda function is configured with the default settings, what will happen to the S3 event when there is a timeout exception?
A. Notification of a failed S3 event is send as an email through Amazon SNS.
B. The S3 event is sent to the default Dead Letter Queue.
C. The S3 event is processed until it is successful.
D. The S3 event is discarded after the event is retried twice.
A company's new mobile app uses Amazon API Gateway. As the development team completes a new release of its APIs, a developer must safely and transparently roll out the API change.
What is the SIMPLEST solution for the developer to use for rolling out the new API version to a limited number of users through API Gateway?
A. Create a new API in API Gateway. Direct a portion of the traffic to the new API using an Amazon Route 53 weighted routing policy.
B. Validate the new API version and promote it to production during the window of lowest expected utilization.
C. Implement an Amazon CloudWatch alarm to trigger a rollback if the observed HTTP 500 status code rate exceeds a predetermined threshold.
D. Use the canary release deployment option in API Gateway. Direct a percentage of the API traffic using the canarySettings setting.
A developer is asked to integrate Amazon CloudWatch into an on-premises application.
How should the application access CloudWatch, according to AWS security best practices?
A. Configure AWS credentials in the application server with an AWS SDK
B. Implement and proxy API-calls through an EC2 instance
C. Store IAM credentials in the source code to enable access
D. Add the application server SSH-key to AWS
A developer is building a new complex application on AWS. The application consists of multiple microservices hosted on Amazon EC2. The developer wants to determine which microservice adds the most latency while handling a request.
Which method should the developer use to make this determination?
A. Instrument each microservice request using the AWS X-Ray SDK. Examine the annotations associated with the requests.
B. Instrument each microservice request using the AWS X-Ray SDK. Examine the subsegments associated with the requests.
C. Instrument each microservice request using the AWS X-Ray SDK. Examine the Amazon CloudWatch EC2 instance metrics associated with the requests.
D. Instrument each microservice request using the Amazon CloudWatch SDK. Examine the CloudWatch EC2 instance metrics associated with the requests.
A developer is monitoring an application running on an Amazon EC2 instance. The application accesses an Amazon DynamoDB table and the developer has configured a custom Amazon CloudWatch metric with data granularity of 1 second. If there are any issues, the developer wants to be notified within 30 seconds using Amazon SNS.
Which CloudWatch mechanism will satisfy this requirement?
A. Configure a high-resolution CloudWatch alarm.
B. Set up a custom AWS Lambda CloudWatch log.
C. Use a Cloud Watch stream.
D. Change to a default CloudWatch metric.
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