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Policies and Standards Automation (10%)

• Applying the concepts that are required to implement standards for logging, security, testing, monitoring & metrics.
• Applying the concepts required to implement the governance strategies;
• Determining how to optimize the cost through automation;

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What Are Topics That AWS DOP-C01 Certification Exam Covers?

The AWS DOP-C01 exam is quite a difficult one as it takes candidates through six different topics, as follows:

• Event Response and Incident;
• Automation Policies and Standards;
• Configuration Management and Infrastructure as Code;

The first topic teaches candidates how to apply the correct concepts to ensure CI/CD pipeline automation. Also, they will become skilled in identifying source control strategies and implement them properly. Another ability developed in this domain would be related to testing integration and automation. Candidates should be ready to learn more about how to manage artifacts in a secure way and determine the right delivery and deployment strategies using AWS Services. The second domain shows candidates the proper strategies to deploy services and applications based on business needs. Also, they will become pros in applying security concepts to ensure the automation of resource provisioning. Within this area, examinees will learn how to implement and deploy lifecycle hooks. Finally, they will understand more about the concepts necessary to manage different systems with the help of AWS configuration management services and tools. The third chapter handles monitoring and logging principles. The specialists interested to learn more for their AWS DevOps Engineer – Professional exam should develop the abilities to apply concepts and services necessary for monitoring automation, event management, audit, logging, and monitoring of operating systems and AWS infrastructures. Also, they will learn how to develop and determine metadata strategies, metrics, aggregation, and logs storage. Within the fourth section, candidates will understand more about the concepts related to logging, metrics, security, and monitoring of AWS services. Also, they will get to know more about determining cost optimization through automation. Another concept related to this chapter deals with governance strategies implementation. Incident and Event Response is the fifth domain that is tested in the AWS DevOps Engineer – Professional certification. Those who are determined to take DOP-C01 will learn how to troubleshoot different issues and identify solutions to restore operations. They will become proficient in determining event management and alerting automation. The final subtopics included here are connected to automated healing implementation and event-driven automated actions set up. Last but not least, high availability and disaster recovery are essential for success in your certification exam. It is important for candidates to know how to determine the differences between multi-AZ and multi-region concepts and how to implement them correctly. Also, applicants will learn how to implement fault tolerance, availability, and scalability AWS features. Another essential subtopic included in this chapter talks about choosing the right AWS services for different business needs. Candidates will as well learn how to evaluate the failure deployment and determine how to automate and design disaster recovery strategies.

Talking about the exam content, it covers six broad domains, which include the following:

• SDLC AutomationThis section will offer you about 22% of the questions from the whole exam content. This is the biggest area of all that are available. For this topic, you need to have some experience in applying the concepts that are required to automate a CI/CD pipeline, automate and integrate testing, and build and manage artifacts securely. You should also know about the source control strategies and be skillful enough to be able to implement them. It is also will be vital for your role to know what to do with the delivery or deployment strategies, such as Canary, Red/black, Blue/green, A/B, etc.
• Infrastructure as Code and Configuration ManagementThis objective covers about 19% of the whole content. For this section, it is required that you understand all the needed concepts related to the deployment services that are based on deployment needs, infrastructure and app deployment models based on business needs, and the implementation of the lifecycle hooks on the deployment. This area also includes your knowledge of how to apply security concepts in the automation of resource provisioning and your ability to work with the concepts that are needed to manage systems with the use of AWS configuration management tools as well as services.
• Response to Incidents and EventsThis is the third largest area of the whole list of topics that covers 18% of the exam content. It is all about troubleshooting of the possible issues and determination of how to restore operations. It also includes the evaluation of your skills in applying different concepts that are required to implement automated healing or set up actions that are event-driven and automated. The knowledge of how to perform an automation process for alerting and event management is also essential.

Amazon AWS Certified DevOps Engineer - Professional (DOP-C01) Sample Questions (Q270-Q275):

NEW QUESTION # 270
After reviewing the last quarter's monthly bills, management has noticed an increase in the overall bill from Amazon.
After researching this increase in cost, you discovered that one of your new services is doing a lot of GET Bucket API calls to Amazon S3 to build a metadata cache of all objects in the applications bucket.
Your boss has asked you to come up with a new cost-effective way to help reduce the amount of these new GET Bucket API calls.
What process should you use to help mitigate the cost?

• A. Update your Amazon S3 buckets' lifecycle policies to automatically push a list of objects to a new bucket, and use this list to view objects associated with the application's bucket.
• B. Upload all images to Amazon SQS, set up SQS lifecycles to move all images to Amazon S3, and initiate an Amazon SNS notification to your application to update the application's Internal Amazon S3 object metadata cache.
• C. Upload all images to an ElastiCache filecache server. Update your application to now read all file metadata from the ElastiCache filecache server, and configure the ElastiCache policies to push all files to Amazon S3 for long-term storage.
• D. Create a new DynamoDB table. Use the new DynamoDB table to store all metadata about all objects uploaded to Amazon S3.
  Any time a new object is uploaded, update the application's internal Amazon S3 object metadata cache from DynamoDB.
• E. Using Amazon SNS, create a notification on any new Amazon S3 objects that automatically updates a new DynamoDB table to store all metadata about the new object.
  Subscribe the application to the Amazon SNS topic to update its internal Amazon S3 object metadata cache from the DynamoDB table.

Answer: E
NEW QUESTION # 271
You have deployed a Cloudformation template which is used to spin up resources in your account. Which of the following status in Cloudformation represents a failure.

• A. ROLLBACKINPROGRESS
• B. UPDATEINPROGRESS
• C. UPDATECOMPLETECLEANUPJN_PROGRESS
• D. DELETE_COMPLETE

Answer: A Explanation:
Explanation
AWS Cloud Formation provisions and configures resources by making calls to the AWS services that are described in your template.
After all the resources have been created, AWS Cloud Formation reports that your stack has been created. You can then start using the resources in your stack. If stack creation fails, AWS CloudFormation rolls back your changes by deleting the resources that it created.
The below snapshot from Cloudformation shows what happens when there is an error in the stack creation.

For more information on how Cloud Formation works, please refer to the below link:
* http://docs.ws.amazon.com/AWSCIoudFormation/latest/UserGuide/cfn-whatis-howdoesitwork-html
NEW QUESTION # 272
Your company is hosting an application in AWS. The application consists of a set of web servers and AWS RDS. The application is a read intensive application. It has been noticed that the response time of the application decreases due to the load on the AWS RDS instance. Which of the following measures can be taken to scale the data tier. Choose 2 answers from the options given below

• A. CreateAmazon DB Read Replica's. Configure the application layer to query the readreplica's for query needs.
• B. UseElastiCache in front of your Amazon RDS DB to cache common queries.
• C. UseSQS to cache the database queries
• D. UseAutoscaling to scale out and scale in the database tier

Answer: A,B Explanation:
Explanation
The AWS documentation mentions the following
Amazon RDS Read Replicas provide enhanced performance and durability for database (DB) instances. This replication feature makes it easy to elastically scale out beyond the capacity constraints of a single DB Instance for read-heavy database workloads. You can create one or more replicas of a given source DB Instance and serve high-volume application read traffic from multiple copies of your data, thereby increasing aggregate read throughput. Read replicas can also be promoted when needed to become standalone DB instances.
For more information on AWS RDS Read Replica's, please visit the below URL:
https://aws.amazon.com/rds/details/read-replicas/
Amazon OastiCache is a web service that makes it easy to deploy, operate, and scale an in-memory data store or cache in the cloud. The service improves the performance of web applications by allowing you to retrieve information from fast, managed, in-memory data stores, instead of relying entirely on slower disk-based databases.
For more information on AWS Clastic Cache, please visit the below URL:
* https://aws.amazon.com/elasticache/
NEW QUESTION # 273
What is server immutability?

• A. Not updating a server after creation.
• B. Updating a server after creation.
• C. The ability to change server counts.
• D. The inability to change server counts.

Answer: A Explanation:
... disposable upgrades offer a simpler way to know if your application has unknown dependencies. The
underlying EC2 instance usage is considered temporary or ephemeral in nature for the period of
deployment until the current release is active. During the new release, a new set of EC2 instances are
rolled out by terminating older instances. This type of upgrade technique is more common in an
immutable infrastructure.
Reference: https://d0.awsstatic.com/whitepapers/overview-of-deployment-options-on-aws.pdf
NEW QUESTION # 274
A retail company wants to use AWS Elastic Beanstalk to host its online sales website running on Java. Since this will be the production website, the CTO has the following requirements for the deployment strategy:
* Zero downtime. While the deployment is ongoing, the current Amazon EC2 instances in service should remain in service. No deployment or any other action should be performed on the EC2 instances because they serve production traffic.
* A new fleet of instances should be provisioned for deploying the new application version.
* Once the new application version is deployed successfully in the new fleet of instances, the new instances should be placed in service and the old ones should be removed.
* The rollback should be as easy as possible. If the new fleet of instances fail to deploy the new application version, they should be terminated and the current instances should continue serving traffic as normal.
* The resources within the environment (EC2 Auto Scaling group, Elastic Load Balancing, Elastic Beanstalk DNS CNAME) should remain the same and no DNS change should be made.
Which deployment strategy will meet the requirements?

• A. launch a new environment and deploy the new application version there, then perform a CNAME swap between environments.
• B. Use immutable environment updates to meet all the necessary requirements.
• C. Use rolling deployments with a fixed amount of one instance at a time and set the healthy threshold to OK.
• D. Use rolling deployments with additional batch with a fixed amount of one instance at a time and set the healthy threshold to OK.

Answer: B
NEW QUESTION # 275
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