Latest Amazon AWS-DevOps-Engineer-Professional Actual Free Exam Questions & Community Discussion, Page 5

Question #45

Which Auto Scaling process would be helpful when testing new instances before sending traffic to them, while still keeping them in your Auto Scaling Group?

A. Suspend the process Health Check

B. Suspend the process AddToLoadBalancer

C. Suspend the process AZ Rebalance

D. Suspend the process Replace Unhealthy

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Correct Answer: B Vote an answer

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Question #46

A company is testing a web application that runs on Amazon EC2 instances behind an Application Load Balancer. The instances run in an Auto Scaling group across multiple Availability Zones. The company uses a blue/green deployment process with immutable instances when deploying new software. During testing, users are being automatically logged out of the application at random times. Testers also report that, when a new version of the application is deployed, all users are logged out. The Development team needs a solution to ensure users remain logged in across scaling events and application deployments.
What is the MOST efficient way to ensure users remain logged in?

A. Store user session information in an Amazon S3 bucket and modify the application to read session information from the bucket.

B. Modify the application to store user session information in an Amazon ElastiCache cluser.

C. Enable session sharing on the load balancer and modify the application to read from the session store.

D. Enable smart sessions on the load balancer and modify the application to check for an existing session.

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Correct Answer: B Vote an answer

Question #47

What are the bare minimum requirements for a valid Ansible playbook?

A. The hosts declaration and tasks

B. A YAML file with a single line containing `---'.

C. At least one play with at least a hosts declaration

D. The hosts, connection type, fact gathering, vars and tasks.

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Correct Answer: C Vote an answer

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Question #48

You are designing a service that aggregates clickstream data in batch and delivers reports to subscribers via email only once per week. Data is extremely spikey, geographically distributed, high-scale, and unpredictable. How should you design this system?

A. Use AWS Elasticsearch service and EC2 Auto Scaling groups. The Autoscaling groups scale based on click throughput and stream into the Elasticsearch domain, which is also scalable. Use Kibana to generate reports periodically.

B. Use API Gateway invoking Lambdas which PutRecords into Kinesis, and EMR running Spark performing GetRecords on Kinesis to scale with spikes. Spark on EMR outputs the analysis to S3, which are sent out via email.

C. Use a large RedShift cluster to perform the analysis, and a fleet of Lambdas to perform record inserts into the RedShift tables. Lambda will scale rapidly enough for the traffic spikes.

D. Use a CloudFront distribution with access log delivery to S3. Clicks should be recorded as querystring GETs to the distribution. Reports are built and sent by periodically running EMR jobs over the access logs in S3.

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Correct Answer: D Vote an answer

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Question #49

A DevOps Engineer has several legacy applications that all generate different log formats. The Engineer must standardize the formats before writing them to Amazon S3 for querying and analysis.
How can this requirement be met at the LOWEST cost?

A. Use Amazon Kinesis Agent on each server to upload the logs and have Amazon Kinesis Data Firehose use an AWS Lambda function to normalize the logs before writing them to Amazon S3

B. Have the application send its logs to Amazon QuickSight, then use the Amazon QuickSight SPICE engine to normalize the logs. Do the analysis directly from Amazon QuickSight

C. Have the application send its logs to an Amazon EMR cluster and normalize the logs before sending them to Amazon S3

D. Keep the logs in Amazon S3 and use Amazon Redshift Spectrum to normalize the logs in place

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Correct Answer: A Vote an answer

Question #50

A company wants 10 use AWS development tools to replace Its current bash deployment scrips.
The company currently deploys a LAMP application to a group of Amazon EC2 instances behind an Application Load Balancer (ALB). During the deployments, the company unit tests the committed application, stops and starts services, unregisters and re-registers instances with the load balancer, and updates Me permissions.
The company wants to maintain the same deployment functionality through the shift to using AWS services.
Which solution will meet these requirements?

A. Use AWS CodePipeline to move the application from the AWS CodeCommit repository to AWS CodeDeploy.
Use CodeDeploy's deployment group to test the application, unregister and reregister instances with the ALB. and restart services. Use the appspec.yml file to update file permissions without a custom script.

B. Use AWS CodeBuild to test the application.
Use bash scripts invoked by AWS CodeDeploy's appspec.yml file to restart services, and deregister and register instances with the ALB Use the appspec.yml file to update file permissions without a custom script.

C. Use AWS CodePipeline to move the pplication source code from the AWS CodeCommit repository to AWS CodeDeploy. Use CodeDeploy to test the application.
Use CodeDeploy's appspec.yml file to restart services nd update permissions without a custom script.
Use AWS CodeBuild to unregister and re-register instances with the ALB.

D. Use AWS CodePipeline to rigger AWS CodeBuild to test the application.
Use bash scripts invoked by AWS CodeDeploy's appspec yml file to restart services.
Unregister and re-register the instances in the AWS CodeDeploy deployment group with the ALB.
Update the appspec.yml file to update file permissions without a custom script.

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Correct Answer: D Vote an answer

Question #51

Your application is currently running on Amazon EC2 instances behind a load balancer.
Your management has decided to use a Blue/Green deployment strategy.
How should you implement this for each deployment?

A. Using AWS CloudFormation, create a test stack for validating the code, and then deploy the code to each production Amazon EC2 instance.

B. Create a new load balancer with new Amazon EC2 instances, carry out the deployment, and then switch DNS over to the new load balancer using Amazon Route 53 after testing.

C. Launch more Amazon EC2 instances to ensure high availability, de-register each Amazon EC2 instance from the load balancer, upgrade it, and test it, and then register it again with the load balancer.

D. Set up Amazon Route 53 health checks to fail over from any Amazon EC2 instance that is currently being deployed to.

Discussion 0

Correct Answer: B Vote an answer

Question #52

Which major database needs a BYO license?

A. MariaDB

B. MySQL

C. Oracle

D. PostgreSQL

Discussion 0

Correct Answer: C Vote an answer

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Question #53

If designing a single playbook to run across multiple Linux distributions that have distribution specific commands, what would be the best method to allow a successful run?

A. Use `ignore_errors: true' in the tasks.

B. Enable fact gathering and use the `when' conditional to match the distribution to the task.

C. Use the `shell' module to write your own checks for each command that is ran.

D. This isn't possible, a separate playbook for each target Linux distribution is required.

Discussion 0

Correct Answer: B Vote an answer

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Question #54

A company runs a database on a single Amazon EC2 instance in a development environment.
The data is stored on separate Amazon EBS volumes that are attached to the EC2 instance. An Amazon Route 53 A record has been created and configured to point to the EC2 instance. The company would like to automate the recovery of the database instance when an instance or Availability Zone (AZ) fails. The company also wants to keep its costs low. The RTO is 4 hours and RPO is 12 hours. Which solution should a DevOps Engineer implement to meet these requirements?

A. Run the database on two separate EC2 instances in different AZs. Configure one of the instances as a master and the other as a standby. Set up replication between the master and standby instances. Point the Route 53 record to the master. Configure an Amazon CloudWatch Events rule to invoke an AWS Lambda function upon the EC2 instance termination. The Lambda function launches a replacement EC2 instance. If the terminated instance was the active node, the function promotes the standby to master and points the Route 53 record to it.

B. Run the database on two separate EC2 instances in different AZs with one active and the other as a standby. Attach the data volumes to the active instance. Configure an Amazon CloudWatch Events rule to invoke an AWS Lambda function on EC2 instance termination. The Lambda function launches a replacement EC2 instance. If the terminated instance was the active node, then the function attaches the data volumes to the standby node. Start the database and update the Route 53 record.

C. Run the database in an Auto Scaling group with a minimum and maximum instance count of 1 in multiple AZs. Create an AWS Lambda function that is triggered by a scheduled Amazon CloudWatch Events rule every 4 hours to take a snapshot of the data volume and apply a tag.
Have the instance UserData get the latest snapshot, create a new volume from it, and attach and mount the volume. Then start the database and update the Route 53 record.

D. Run the database in an Auto Scaling group with a minimum and maximum instance count of 1 in multiple AZs. Add a lifecycle hook to the Auto Scaling group and define an Amazon CloudWatch Events rule that is triggered when a lifecycle event occurs. Have the CloudWatch Events rule invoke an AWS Lambda function to detach or attach the Amazon EBS data volumes from the EC2 instance based on the event. Configure the EC2 instance UserData to mount the data volumes (retry on failure with a short delay), then start the database and update the Route 53 record.

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Correct Answer: C Vote an answer

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Question #55

You need to grant a vendor access to your AWS account. They need to be able to read protected messages in a private S3 bucket at their leisure. They also use AWS. What is the best way to accomplish this?

A. Create an IAM User with API Access Keys. Grant the User permissions to access the bucket.
Give the vendor the AWS Access Key ID and AWS Secret Access Key for the User.

B. Generate a signed S3 PUT URL and a signed S3 PUT URL, both with wildcard values and 2 year durations. Pass the URLs to the vendor.

C. Create an EC2 Instance Profile on your account. Grant the associated IAM role full access to the bucket. Start an EC2 instance with this Profile and give SSH access to the instance to the vendor.

D. Create a cross-account IAM Role with permission to access the bucket, and grant permission to use the Role to the vendor AWS account.

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Correct Answer: D Vote an answer

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