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Amazon AWS Certified DevOps Engineer - Professional Sample Questions (Q171-Q176):

NEW QUESTION # 171
A company is using an AWS CodeBuild project to build and package an application. The packages are copied to a shared Amazon S3 bucket before being deployed across multiple AWS accounts.
The buildspec.yml file contains the following:

The DevOps Engineer has noticed that anybody with an AWS account is able to download the artifacts.
What steps should the DevOps Engineer take to stop this?

A. Modify the post_build command to remove ""-acl authenticated-read and configure a bucket policy that allows read access to the relevant AWS accounts only.
B. Modify the post_build to command to use ""-acl public-read and configure a bucket policy that grants read access to the relevant AWS accounts only.
C. Configure a default ACL for the S3 bucket that defines the set of authenticated users as the relevant AWS accounts only and grants read-only access.
D. Create an S3 bucket policy that grants read access to the relevant AWS accounts and denies read access to the principal "*"

Answer: D

NEW QUESTION # 172
A company is implementing a well-architected design for its globally accessible API stack. The design needs to ensure both high reliability and fast response times for users located in North America and Europe.
The API stack contains the following three tiers:
* Amazon API Gateway
* AWS Lambda
* Amazon DynamoDB
Which solution will meet the requirements?

A. Configure Amazon Route 53 to point to API Gateway APIs in North America and Europe using latency-based routing and health checks. Configure the APIs to forward requests to a Lambda function in that Region. Configure the Lambda functions to retrieve and update the data in a DynamoDB global table.
B. Configure Amazon Route 53 to point to API Gateway in North America, create a disaster recovery API in Europe, and configure both APIs to forward requests to the Lambda functions in that Region.
Retrieve the data from a DynamoDB global table. Deploy a Lambda function to check the North America API health every 5 minutes. In the event of a failure, update Route 53 to point to the disaster recovery API.
C. Configure Amazon Route 53 to point to API Gateway API in North America using latency-based routing. Configure the API to forward requests to the Lambda function in the Region nearest to the user.
Configure the Lambda function to retrieve and update the data in a DynamoDB table.
D. Configure Amazon Route 53 to point to API Gateway APIs in North America and Europe using health checks. Configure the APIs to forward requests to a Lambda function in that Region. Configure the Lambda functions to retrieve and update the data in a DynamoDB table in the same Region as the Lambda function.

Answer: D

NEW QUESTION # 173
A company has 100 GB of log data in an Amazon S3 bucket stored in .csv format. SQL developers want to query this data and generate graphs to visualize it. They also need an efficient, automated way to store metadata from the .csv file.
Which combination of steps should be taken to meet these requirements with the LEAST amount of effort? (Select THREE.)

A. Query the data with Amazon Redshift.
B. Filter the data through Amazon QuickSight to visualize the data.
C. Filter the data through AWS X-Ray to visualize the data.
D. Query the data with Amazon Athena.
E. Use Amazon S3 as the persistent metadata store.
F. Use AWS Glue as the persistent metadata store.

Answer: B,D,F

NEW QUESTION # 174
A DevOps Engineer is working on a project that is hosted on Amazon Linux and has failed a security review.
The DevOps Manager has been asked to review the company buildspec.yaml file for an AWS CodeBuild project and provide recommendations. The buildspec.yaml file is configured as follows:

What changes should be recommended to comply with AWS security best practices? (Select THREE.)

A. Update the CodeBuild project role with the necessary permissions and then remove the AWS credentials from the environment variable.
B. Use AWS Systems Manager run command versus scp and ssh commands directly to the instance.
C. Store the DB_PASSWORD as a SecureString value in AWS Systems Manager Parameter Store and then remove the DB_PASSWORD from the environment variables.
D. Move the environment variables to the "db-deploy-bucket' Amazon S3 bucket, add a prebuild stage to download, then export the variables.
E. Scramble the environment variables using XOR followed by Base64, add a section to install, and then run XOR and Base64 to the build phase.
F. Add a post-build command to remove the temporary files from the container before termination to ensure they cannot be seen by other CodeBuild users.

Answer: A,B,C

Explanation:
Explanation
https://aws.amazon.com/codebuild/faqs/

NEW QUESTION # 175
Management has reported an increase in the monthly bill from Amazon Web Services, and they are extremely concerned with this increased cost. Management has asked you to determine the exact cause of this increase. After reviewing the billing report, you notice an increase in the data transfer cost. How can you provide management with a better insight into data transfer use?

A. Deliver custom metrics to Amazon CloudWatch per application that breaks down application data transfer into multiple, more specific data points.
B. Use Amazon CloudWatch Logs to run a map-reduce on your logs to determine high usage and data transfer.
C. Update your Amazon CloudWatch metrics to use five-second granularity, which will give better detailed metrics that can be combined with your billing data to pinpoint anomalies.
D. Using Amazon CloudWatch metrics, pull your Elastic Load Balancing outbound data transfer metrics monthly, and include them with your billing report to show which application is causing higher bandwidth usage.

Answer: A

Explanation:
You can publish your own metrics to CloudWatch using the AWS CLI or an API. You can view statistical graphs of your published metrics with the AWS Management Console. CloudWatch stores data about a metric as a series of data points. Each data point has an associated time stamp. You can even publish an aggregated set of data points called a statistic set. If you have custom metrics specific to your application, you can give a breakdown to the management on the exact issue.
Option A won't be sufficient to provide better insights. Option B is an overhead when you can make the application publish custom metrics Option D is invalid because just the ELB metrics will not give the entire picture.
For more information on custom metrics, please refer to the below document link: from AWS
http://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/publ ishingMetrics.htmI

NEW QUESTION # 176
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