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To be eligible for the AWS-DevOps-Engineer-Professional certification exam, candidates should have a minimum of two years of experience in managing and operating AWS services and should be proficient in at least one programming language. They should also have a deep understanding of DevOps practices and how they can be implemented in the AWS environment. AWS Certified DevOps Engineer - Professional certification exam consists of multiple-choice and multiple-response questions, and candidates are given 170 minutes to complete the exam.

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The AWS-DevOps certification is highly valued in the industry and can help professionals advance their careers in DevOps. AWS is one of the leading cloud providers in the world, and its platform is used by millions of companies to host their applications and services. By earning the AWS-DevOps certification, professionals can demonstrate their expertise in deploying and managing applications on AWS, which can lead to new job opportunities and higher salaries.

The AWS Certified DevOps Engineer - Professional (DOP-C01) Certification Exam is a highly sought-after certification for professionals in the DevOps field. AWS Certified DevOps Engineer - Professional certification is designed to validate the skills and expertise of professionals who are responsible for managing and operating distributed application systems on the AWS platform. DOP-C01 Exam measures the candidate's ability to implement and manage continuous delivery and automation, infrastructure as code, monitoring and logging, and security and compliance processes on AWS.

Amazon AWS Certified DevOps Engineer - Professional Sample Questions (Q169-Q174):

NEW QUESTION # 169
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 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 EMRjobs over the access logs in S3.
C 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.
D- 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 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.

Answer: A

Explanation:
Explanation
When you look at building reports or analyzing data from a large data set, you need to consider CMR because this service is built on the Hadoop framework which is used to processes large data sets.
The ideal approach to getting data onto CMR is to use S3. Since the Data is extremely spikey and geographically distributed, using edge locations via Cloudfront distributions is the best way to fetch the data.
Option A is invalid because RedShift is more of a petabyte storage cluster.
Option C is invalid because having both Kinesis and CMR for the job analysis is redundant.
Option D is invalid because Elastic Search is not an option for processing records.
For more information on Amazon CMR, please visit the below URL:
* https://aws.amazon.com/emr/

NEW QUESTION # 170
You have an application which consists of EC2 instances in an Auto Scaling group. Between a particular time frame every day, there is an increase in traffic to your website. Hence users are complaining of a poor response time on the application. You have configured your Auto Scaling group to deploy one new EC2 instance when CPU utilization is greater than 60% for 2 consecutive periods of 5 minutes. What is the least cost-effective way to resolve this problem?

A. Decrease the collection period to ten minutes
B. Decrease the threshold CPU utilization percentage at which to deploy a new instance
C. Decrease the consecutive number of collection periods
D. Increase the minimum number of instances in the Auto Scaling group

Answer: D

Explanation:
If you increase the minimum number of instances, then they will be running even though the load is not high on the website. Hence you are incurring cost even though there is no need.
All of the remaining options are possible options which can be used to increase the number of instances on a high load.
For more information on On-demand scaling, please refer to the below link:
http://docs.aws.amazon.com/autoscaling/latest/userguide/as-scale-based-on-demand. html
Note: The tricky part where the question is asking for 'least cost effective way". You got the design consideration correctly but need to be careful on how the question is phrased.

NEW QUESTION # 171
You need to process long-running jobs once and only once. How might you do this?

A. Use an SNS queue and set the visibility timeout to long enough for jobs to process.
B. Use an SQS queue and set the reprocessing timeout to long enough for jobs to process.
C. Use an SNS queue and set the reprocessing timeout to long enough for jobs to process.
D. Use an SQS queue and set the visibility timeout to long enough for jobs to process.

Answer: D

Explanation:
The message timeout defines how long after a successful receive request SQS waits before allowing jobs
to be seen by other components, and proper configuration prevents duplicate processing.
Reference:
http://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/MessageLifecycle.ht
ml

NEW QUESTION # 172
A news organization plans to migrate their 20 TB video archive to AWS. The files are rarely accessed, but
when they are, a request is made in advance and a 3 to 5-hour retrieval time frame is acceptable. However,
when there is a breaking news story, the editors require access to archived footage within minutes.
Which storage solution meets the needs of this organization while providing the LOWEST cost of storage?

A. Store the archive in Amazon S3 Reduced Redundancy Storage.
B. Store the archive in Amazon Glacier and pay the additional charge for expedited retrieval when needed.
C. Store the archive in Amazon Glacier and use standard retrieval for all content.
D. Store the archive in Amazon S3 with a lifecycle policy to move this to S3 Infrequent Access after 30
days.

Answer: C

NEW QUESTION # 173
You're building a mobile application game. The application needs permissions for each user to communicate
and store data in DynamoDB tables. What is the best method for granting each mobile device that installs your
application to access DynamoDB tables for storage when required? Choose the correct answer from the
options below

A. Create an 1AM group that only gives access to your application and to the DynamoDB tables. Then,
when writing to DynamoDB, simply include the unique device ID to associate the data with that specific
user.
B. Create an Active Directory server and an AD user for each mobile application user. When the user signs
in to the AD sign-on, allow the AD server to federate using SAML 2.0 to 1AM and assign a role to the
AD user which is the assumed with AssumeRoleWithSAML
C. Create an 1AM role with the proper permission policy to communicate with the DynamoDB table. Use
web identity federation, which assumes the 1AM role using AssumeRoleWithWebldentity, when the
user signs in, granting temporary security credentials using STS.
D. During the install and game configuration process, have each user create an 1AM credential and assign
the 1AM user to a group with proper permissions to communicate with DynamoDB.

Answer: C

Explanation:
Explanation
Answer - C
For access to any AWS service, the ideal approach for any application is to use Roles. This is the first
preference.
For more information on 1AM policies please refer to the below link:
* http://docs.aws.a
mazon.com/IAM/latest/UserGuide/access_policies.html
Next for any web application, you need to use web identity federation. Hence option D is the right option. This
along with the usage of roles is highly stressed in the
aws documentation.
The AWS documentation mentions the following
When developing a web application it is recommend not to embed or distribute long-term AWS credentials
with apps that a user downloads to a device, even in an
encrypted store. Instead, build your app so that it requests temporary AWS security credentials dynamically
when needed using web identity federation. The
supplied temporary credentials map to an AWS role that has only the permissions needed to perform the tasks
required by the mobile app.
For more information on web identity federation please refer to the below link:
* http://docs.aws.amazon.com/IAM/latest/UserGuide/id_roles_providers_oidc.html

NEW QUESTION # 174
......

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