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Amazon AWS Certified DevOps Engineer - Professional Sample Questions (Q502-Q507):

NEW QUESTION # 502
You are building a game high score table in DynamoDB. You will store each user's highest score for each
game, with many games, all of which have relatively similar usage levels and numbers of players. You
need to be able to look up the highest score for any game. What's the best DynamoDB key structure?

A. GameID as the hash / only key.
B. GameID as the range / only key.
C. GameID as the hash key, HighestScore as the range key.
D. HighestScore as the hash / only key.

Answer: C

Explanation:
Since access and storage for games is uniform, and you need to have ordering within each game for the
scores (to access the highest value), your hash (partition) key should be the GameID, and there should be
a range key for HighestScore.
Reference:
http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/GuidelinesForTables.html#Guideli
nesForTables.Partitions

NEW QUESTION # 503
You have a set of EC2 Instances hosting an nginx server and a web application that is used by a set of users in your organization. After a recent application version upgrade, the instance runs into technical issues and needs an immediate restart. This does not give you enough time to inspect the cause of the issue on the server. Which of the following options if implemented prior to the incident would have assisted in detecting the underlying cause of the issue?

A. Streamall the data to Amazon Kinesis and then analyze the data in real time.
B. Install Cloudwatch logs agent on the instance and send all the logs to Cloudwatch logs.
C. Enabledetailed monitoring and check the Cloudwatch metrics to see the cause of theissue.
D. Createa snapshot of the EBS volume before restart, attach it to another instance as avolume and then diagnose the issue.

Answer: B

Explanation:
Explanation
The AWS documentation mentions the following
You can publish log data from Amazon CC2 instances running Linux or Windows Server, and logged events from AWS CloudTrail. CloudWatch Logs can consume logs from resources in any region, but you can only view the log data in the CloudWatch console in the regions where CloudWatch Logs is supported.
Option A is invalid as detailed monitoring will only help us to get more information about the performance metrics of the instances, volumes etc and will not be able to provide full information regarding technical issues.
Option B is incorrect if we had created a snapshot prior to the update it might be useful but not after the incident.
Option C is incorrect here we are dealing with an issue concerning the underlying application that handles the data so this solution will not help.
For more information on Cloudwatch logs, please refer to the below link:
* http://docs.aws.amazon.com/AmazonCloudWatch/latest/logs/StartTheCW
LAgent.html

NEW QUESTION # 504
A DevOps Engineer has been asked to recommend a tool to deploy the components of a three-tier web application. This application will use Amazon DynamoDB as a database Which deployment requires the LEAST amount of operational management?

A. Use AWS OpsWorks to create a Classic Load Balancer, an Auto Scaling group application, and database resources Deploy application updates using OpsWorks lifecycle events
B. Use AWS CloudFormation to create a Classic Load Balancer an Auto Scaling group and database resources Deploy application updates using CloudFormation rolling updates
C. Use AWS CloudFormation to create a Classic Load Balancer and an Auto Scaling group. Use AWS OpsWorks to create the application and database resources Deploy application updates with OpsWorks using lifecycle events
D. Use AWS OpsWorks to create a Classic Load Balancer Auto Scaling and application resources Use AWS CloudFormation to create the database resources Deploy application updates using CloudFormation rolling updates

Answer: A

NEW QUESTION # 505
Your application consists of 10% writes and 90% reads. You currently service all requests through a Route53
Alias Record directed towards an AWS ELB, which sits in front of an EC2 Auto Scaling Group. Your system
isgetting very expensive when there are large traffic spikes during certain news events, during which many
more people request to read similar data all at the same time. What is the simplest and cheapest way to reduce
costs and scale with spikes like this?

A. Create another ELB and Auto Scaling Group layer mounted on top of the other system, adding a tier to
the system. Serve most read requests out of the top layer.
B. Create an S3 bucket and asynchronously replicate common requests responses into S3 objects. When a
request comes in for a precomputed response, redirect to AWS S3.
C. Create a CloudFront Distribution and direct Route53 to the Distribution. Use the ELB as an Origin and
specify Cache Behaviours to proxy cache requests which can be served late.
D. Create a Memcached cluster in AWS ElastiCache. Create cache logic to serve requests which can be
served late from the in-memory cache for increased performance.

Answer: C

Explanation:
Explanation
Use Cloudf rant distribution for distributing the heavy reads for your application. You can create a zone apex
record to point to the Cloudfront distribution.
You can control how long your objects stay in a CloudFront cache before CloudFront forwards another request
to your origin. Reducing the duration allows you to serve dynamic content. Increasing the duration means your
users get better performance because your objects are more likely to be served directly from the edge cache. A
longer duration also reduces the load on your origin.
For more information on Cloudfront object expiration, please visit the below URL:
* http://docs.aws.amazon.com/AmazonCloudFrant/latest/DeveloperGuide/Cxpiration.html

NEW QUESTION # 506
You have an ELB setup in AWS with EC2 instances running behind it. You have been requested to monitor the incoming connections to the ELB.
Which of the below options can suffice this requirement?

A. Use a CloudWatch Logs Agent
B. Enable access logs on the load balancer
C. Create a custom metric CloudWatch filter on your load balancer
D. Use AWSCIoudTrail with your load balancer

Answer: B

Explanation:
Clastic Load Balancing provides access logs that capture detailed information about requests sent to your load balancer. Cach log contains information such as the time the request was received, the client's IP address, latencies, request paths, and server responses. You can use these access logs to analyze traffic patterns and to troubleshoot issues.
Option A is invalid because this service will monitor all AWS services Option C and D are invalid since CLB already provides a logging feature.

NEW QUESTION # 507
......

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DOP-C01 Valid Exam Test | Latest DOP-C01 Guide Files

Latest DOP-C01 Guide Files & DOP-C01 Reliable Test Pdf

Amazon AWS Certified DevOps Engineer - Professional Sample Questions (Q502-Q507):

100% Pass Quiz DOP-C01 - AWS Certified DevOps Engineer - Professional –Professional Valid Exam Test

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