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試験高合格率保証2023年10月24日 AWS-DevOps-Engineer-Professional試験問題と正確な回答！ [Q17-Q39]

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試験高合格率保証2023年10月24日 AWS-DevOps-Engineer-Professional試験問題と正確な回答！

テストエンジン練習問題AWS-DevOps-Engineer-Professional有効最新の問題集


Amazon Web Services（AWS）は、世界の主要なクラウドコンピューティングプラットフォームの1つであり、あらゆる規模のビジネスに幅広いクラウドサービスを提供しています。 ITプロフェッショナルがAWS DevOpsの専門知識を実証するのを支援するために、AWSはAWS認定DevOps Engineer -Professional（DOP -C01）試験を提供しています。この認定は、AWS上のアプリケーションの開発と展開における個人のスキルを検証するように設計されています。また、インフラストラクチャを自動化および管理する能力があります。

 

質問 # 17
A Solutions Architect is designing a log-processing solution that requires storage that supports up to 500 MB/s
throughput. The data is sequentially accessed by an Amazon EC2 instance.
Which Amazon storage type satisfies these requirements?

  • A. EBS Provisioned IOPS SSD (io1)
  • B. EBS Throughput Optimized HDD (st1)
  • C. EBS Cold HDD (sc1)
  • D. EBS General Purpose SSD (gp2)

正解：B

解説：
Explanation
Reference https://aws.amazon.com/ebs/faqs/


質問 # 18
A company has a mission-critical application on AWS that uses automatic scaling. The company wants the deployment lifecycle to meet the following parameters
*The application must be deployed one instance at a time to ensure the remaining fleet continues to serve traffic.
*the application is CPU intensive and must ho closely monitored
*the deployment must automatically roll back if the CPU utilization of the deployment instance exceeds 85% Which solution will meet these requirements'?

  • A. Use AWS CloudForrnation to create an AWS Step Functions state machine and Auto Scaling lifecycle hooks to move to one instance at a time into a wait state. Use AWS Systems Manager automation to deploy the update to each instance and move it back into the Auto Scaling group using the heartbeat timeout
  • B. Use AWS Elastic Beanstalk for load balancing and AWS Auto Scaling Configure an alarm tied to the CPU utilization metric Configure rolling deployments with a fixed batch size of one instance Enable enhanced health to monitor the status of the deployment and roll back based on the alarm previously created
  • C. Use AWS CodeDeploy with Amazon EC2 Auto Scaling Configure an alarm tied to the CPU utilization metric Use the CodeDeployDefault OneAtAtime configuration as a deployment strategy Configure automatic rollbacks within the deployment group to roll back the deployment if the alarm thresholds are breached
  • D. Use AWS Systems Manager to perform a blue/green deployment with Amazon EC2 Auto Scaling Configure an alarm tied to the CPU utilization metric Deploy updates one at a time Configure automatic rollbacks within the Auto Scaling group to roll back the deployment if the alarm thresholds are breached.

正解：C


質問 # 19
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. 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.
  • B. Create an S3 bucket policy that grants read access to the relevant AWS accounts and denies read access to the principal "*"
  • C. Modify the post_build to command to use --acl public-readand configure a bucket policy that grants read access to the relevant AWS accounts only.
  • D. Modify the post_build command to remove --acl authenticated-readand configure a bucket policy that allows read access to the relevant AWS accounts only.

正解：C


質問 # 20
You have a code repository that uses Amazon S3 as a data store. During a recent audit of your security controls, some concerns were raised about maintaining the integrity of the data in the Amazon S3 bucket.
Another concern was raised around securely deploying code from Amazon S3 to applications running on Amazon EC2 in a virtual private cloud. What are some measures that you can implement to mitigate these concerns? Choose two answers from the options given below.

  • A. Use AWS Data Pipeline to lifecycle the data in your Amazon S3 bucket to Amazon Glacier on a weekly basis.
  • B. Add an Amazon S3 bucket policy with a condition statement that requires multi-factor authentication in order to delete objects and enable bucket versioning.
  • C. Add an Amazon S3 bucket policy with a condition statement to allow access only from Amazon EC2 instances with RFC 1918 IP addresses and enable bucket versioning.
  • D. Create an Amazon Identity and Access Management role with authorization to access the Amazon S3 bucket, and launch all of your application's Amazon EC2 instances with this role.
  • E. Use AWS Data Pipeline with multi-factor authentication to securely deploy code from the Amazon S3 bucket to your Amazon EC2 instances.
  • F. Use a configuration management service to deploy AWS Identity and Access Management user credentials to the Amazon EC2 instances. Use these credentials to securely access the Amazon S3 bucket when deploying code.

正解：B、D

解説：
Explanation
You can add another layer of protection by enabling MFA Delete on a versioned bucket. Once you do so, you must provide your AWS account's access keys and a valid code from the account's MFA device in order to permanently delete an object version or suspend or reactivate versioning on the bucket.
For more information on MFA please refer to the below link:
* https://aws.amazon.com/blogs/security/securing-access-to-aws-using-mfa-part-3/ IAM roles are designed so that your applications can securely make API requests from your instances, without requiring you to manage the security credentials that the applications use. Instead of creating and distributing your AWS credentials, you can delegate permission to make API requests using 1AM roles For more information on Roles for CC2 please refer to the below link:
* http://docs.aws.a
mazon.com/AWSCC2/latest/UserGuide/iam-roles-for-amazon-ec2. htmI
Option A is invalid because this will not address either the integrity or security concern completely.
Option C is invalid because user credentials should never be used in CC2 instances to access AWS resources.
Option C and F are invalid because AWS Pipeline is an unnecessary overhead when you already have inbuilt controls to manager security for S3.


質問 # 21
Which is the proper syntax for referencing a variable's value in an Ansible task?

  • A. ${variable_name}
  • B. "{{ variable_name }}"
  • C. { variable_name }
  • D. @variable_name

正解：B

解説：
We use the variable's name to reference the variable which we encapsulate in curly brackets
`{{ }}'; however, the YAML syntax dictates that a string beginning with a curly bracket denotes a dictionary value. To get around this it's proper to wrap the variable declaration in quotes.
Reference: http://docs.ansible.com/ansible/playbooks_variables.html#hey-wait-a-yaml-gotcha


質問 # 22
You have decided that you need to change the instance type of your production instances which are running as part of an AutoScaling group. The entire architecture is deployed using CloudFormation Template. You currently have 4 instances in Production.
You cannot have any interruption in service and need to ensure 2 instances are always runningduring the update. Which of the options below listed can be used for this?

  • A. AutoScalinglntegrationUpdate
  • B. AutoScalingScheduledAction
  • C. AutoScalingReplacingUpdate
  • D. AutoScalingRollingUpdate

正解：D

解説：
The AWS::AutoScaling::AutoScalingGroup resource supports an UpdatePoIicy attribute. This is used to define how an Auto Scalinggroup resource is updated when an update to the Cloud Formation stack occurs. A common approach to updating an Auto Scaling group is to perform a rolling update, which is done by specifying the AutoScalingRollingUpdate policy. This retains the same Auto Scaling group and replaces old instances with new ones, according to the parameters specified.
For more information on Autoscaling updates, please refer to the below link:
https://aws.amazon.com/premiumsupport/knowledge-center/auto-scaling-group-rolling-updates/


質問 # 23
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. Create a custom metric CloudWatch filter on your load balancer
  • B. Use a CloudWatch Logs Agent
  • C. UseAWSCIoudTrail with your load balancer
  • D. Enable access logs on the load balancer

正解：D

解説：
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.
For more information on ELB access logs, please refer to the below document link: from AWS
http://docs.aws.amazon.com/elasticloadbalancing/latest/classic/access-log-collection. html


質問 # 24
A DevOps engineer has been tasked with ensuring that all Amazon S3 buckets, except for those with the word
"public" in the name, allow access only to authorized users utilizing S3 bucket policies. The security team wants to be notified when a bucket is created without the proper policy and for the policy to be automatically updated.
Which solutions will meet these requirements?

  • A. Create an Amazon EventBridge (Amazon CloudWatch Events) rule that triggers when an S3 bucket is created. Use an AWS Lambda function to determine whether the bucket should be private. If the bucket should be private, update the PublicAccessBlock configuration. Configure a second EventBridge (CloudWatch Events) rule to notify the security team using Amazon SNS when PutBucketPolicy is called.
  • B. Create an Amazon S3 event notification that triggers when an S3 bucket is created that does not have the word "public" in the name. Define an AWS Lambda function as a target for this notification and use the function to apply a new default policy to the S3 bucket. Create an additional notification with the same filter and use Amazon SNS to send an email to the security team.
  • C. Create an Amazon EventBridge (Amazon CloudWatch Events) rule that triggers when a new object is created in a bucket that does not have the word "public" in the name. Target and use an AWS Lambda function to update the PublicAccessBlock configuration. Create an additional notification with the same filter and use Amazon SNS to send an email to the security team.
  • D. Create a custom AWS Config rule that will trigger an AWS Lambda function when an S3 bucket is created or updated. Use the Lambda function to look for S3 buckets that should be private, but that do not have a bucket policy that enforces privacy. When such a bucket is found, invoke a remediation action and use Amazon SNS to notify the security team.

正解：C


質問 # 25
You work for a startup that has developed a new photo-sharing application for mobile devices.
Over recent months your application has increased in popularity; this has resulted in a decrease in the performance of the application clue to the increased load.
Your application has a two-tier architecture that is composed of an Auto Scaling PHP application tier and a MySQL RDS instance initially deployed with AWS CloudFormation.
Your Auto Scaling group has a min value of 4 and a max value of 8. The desired capacity is now at 8 because of the high CPU utilization of the instances.
After some analysis, you are confident that the performance issues stem from a constraint in CPU capacity, although memory utilization remains low.
You therefore decide to move from the general-purpose M3 instances to the compute-optimized C3 instances.
How would you deploy this change while minimizing any interruption to your end users?

  • A. Sign into the AWS Management Console, copy the old launch configuration, and create a new launch configuration that specifies the C3 instances.
    Update the Auto Scaling group with the new launch configuration.
    Auto Scaling will then update the instance type of all running instances.
  • B. Update the launch configuration specified in the AWS CloudFormation template with the new C3 instance type.
    Run a stack update with the new template.
    Auto Scaling will then update the instances with the new instance type.
  • C. Update the launch configuration specified in the AWS CloudFormation template with the new C3 instance type.
    Also add an UpdatePolicy attribute to your Auto Scaling group that specifies AutoScalingRollingUpdate.
    Run a stack update with the new template.
  • D. Sign into the AWS Management Console, and update the existing launch configuration with the new C3 instance type.
    Add an UpdatePolicy attribute to your Auto Scaling group that specifies AutoScalingRollingUpdate.

正解：C


質問 # 26
Which of the following service can be used to provision ECS Cluster containing following components in an automated way:
1) Application Load Balancer for distributing traffic among various task instances running in EC2 Instances
2) Single task instance on each EC2 running as part of auto scaling group
3) Ability to support various types of deployment strategies

  • A. CodeCommit
  • B. Elastic beanstalk
  • C. Opswork
  • D. SAM

正解：B

解説：
Explanation
You can create docker environments that support multiple containers per Amazon CC2 instance with multi-container Docker platform for Elastic Beanstalk-Elastic Beanstalk uses Amazon Elastic Container Service (Amazon CCS) to coordinate container deployments to multi-container Docker environments.
Amazon CCS provides tools to manage a cluster of instances running Docker containers. Elastic Beanstalk takes care of Amazon CCS tasks including cluster creation, task definition, and execution Please refer to the below AWS documentation:
* https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/create_deploy_docker_ecs.html


質問 # 27
What does it mean if you have zero IOPS and a non-empty I/O queue for all EBS volumes attached to a running EC2 instance?

  • A. The I/O queue is buffer flushing.
  • B. The EBS volume is unavailable.
  • C. You need to re-mount the EBS volume in the OS.
  • D. Your EBS disk head(s) is/are seeking magnetic stripes.

正解：B

解説：
This is the definition of Unavailable from the EC2 and EBS SLA. "Unavailable" and
"Unavailability" mean... For Amazon EBS, when all of your attached volumes perform zero read write IO, with pending IO in the queue.
https://aws.amazon.com/ec2/sla/


質問 # 28
You have a legacy application running that uses an m4.large instance size and cannot scale with Auto Scaling, but only has peak performance 5% of the time. This is a huge waste of resources and money so your Senior Technical Manager has set you the task of trying to reduce costs while still keeping the legacy application running as it should. Which of the following would best accomplish the task your manager has set you?
Choose the correct answer from the options below

  • A. Use a T2burstable performance instance.
  • B. Use t2.nano instance and add spot instances when they are required.
  • C. Use two t2.nano instances that have single Root I/O Visualization.
  • D. Use a C4.large instance with enhanced networking.

正解：A

解説：
Explanation
The aws documentation clearly indicates using T2 CC2 instance types for those instances which don't use CPU that often.
T2
T2 instances are Burstable Performance Instances that provide a baseline level of CPU performance with the ability to burst above the baseline.
T2 Unlimited instances can sustain high CPU performance for as long as a workload needs it. For most general-purpose workloads, T2 Unlimited instances will provide ample performance without any additional charges. If the instance needs to run at higher CPU utilization for a prolonged period, it can also do so at a flat additional charge of 5 cents per vCPU-hour.
The baseline performance and ability to burst are governed by CPU Credits. T2 instances receive CPU Credits continuously at a set rate depending on the instance size, accumulating CPU Credits when they are idle, and consuming CPU credits when they are active. T2 instances are a good choice for a variety of general-purpose workloads including micro-services, low-latency interactive applications, small and medium databases, virtual desktops, development, build and stage environments, code repositories, and product prototypes. For more information see Burstable Performance Instances.
For more information on F_C2 instance types please see the below link:
* https://aws.amazon.com/ec2/instance-types/


質問 # 29
Which of the following design strategies is ideal when designing loosely coupled systems. Choose 2 answers
from the options given below

  • A. Using SNS to establish communication between the web and worker roles
  • B. Having the web and worker roles running on separate EC2 Instances
  • C. Having the web and worker roles running on the same set of EC2 Instances
  • D. Using SQS to establish communication between the web and worker roles

正解：B、D

解説：
Explanation
The below diagram shows the ideal design which uses SQS and separate environments for web and worker
processes. The SQS queue manages the communication
between the web and worker roles.

One example is the way Elastic beanstalk manages worker environments. For more information on this, please
visit the below URL:
http://docs.aws.a
mazon.com/elasticbeanstalk/latest/dg/using-features-managing-env-tiers.htm I


質問 # 30
Customers have recently been complaining that your web application has randomly stopped responding.
During a deep dive of your logs, the team has discovered a major bug in your new Java web application.
This bug is causing a memory leak that eventually causes the application to crash.
Your web application runs on Amazon EC2 and was built with AWS CloudFormation.
Which techniques should you use to help detect these problems faster, as well as help eliminate the server's unresponsiveness? Choose 2 answers

  • A. Update your CloudWatch metric granularity config for all Amazon EC2 memory metrics to support five- second granularity.
    Create a CloudWatch alarm that triggers an Amazon SNS notification to page your team when the application memory becomes too large.
  • B. Update your AWS CloudFormation configuration to take advantage of CloudWatch metrics Agent.
    Configure the CloudWatch Metrics Agent to monitor memory usage and trigger an Amazon SNS alarm.
  • C. Update your AWS CloudFormation configuration to take advantage of Auto Scaling groups.
    Configure an Auto Scaling group policy to trigger off your custom CloudWatch metrics.
  • D. Update your AWS CloudFormation configuration and enable a CustomResource that uses cfn- signal to detect memory leaks.
  • E. Create a custom CloudWatch metric that you push your JVM memory usage to.
    Create a Cloudwatch alarm that triggers an Amazon SNS notification to page your team when the application memory usage becomes too large.

正解：C、E


質問 # 31
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 Replace Unhealthy
  • D. Suspend the process AZ Rebalance

正解：B

解説：
If you suspend Ad dTo Load Balancer, Auto Scaling launches the instances but does not add them to the load balancer or target group. If you resume
the AddTo Load Balancer process. Auto Scaling resumes adding instances to the load balancer or target group when they are launched. However, Auto Scaling does
not add the instances that were launched while this process was suspended. You must register those instances manually.
Option A is invalid because this just balances the number of CC2 instances in the group across the Availability Zones in the region
Option B is invalid because this just checks the health of the instances. Auto Scaling marks an instance as unhealthy if Amazon CC2 or Clastic Load Balancing tells
Auto Scaling that the instance is unhealthy.
Option C is invalid because this process just terminates instances that are marked as unhealthy and later creates new instances to replace them.
For more information on process suspension, please refer to the below document link: from AWS
http://docs.aws.amazon.com/autoscaling/latest/userguide/as-suspend-resume-processes.html


質問 # 32
A company has developed a static website hosted on an Amazon S3 bucket. The website is deployed using AWS CloudFormation. The CloudFormation template defines an S3 bucket and a custom resource that copies content into the bucket from a source location.
The company has decided that it needs to move the website to a new location, so the existing CloudFormation stack must be deleted and re-created. However, CloudFormation reports that the stack could not be deleted cleanly.
What is the MOST likely cause and how can the DevOps Engineer mitigate this problem for this and future versions of the website?

  • A. Deletion has failed because the S3 bucket is not empty. Modify the custom resource's AWS Lambda function code to recursively empty the bucket when RequestType is Delete.
  • B. Deletion has failed because the custom resource does not define a deletion policy. Add a DeletionPolicy property to the custom resource definition with a value of RemoveOnDeletion.
  • C. Deletion has failed because the S3 bucket is not empty. Modify the S3 bucket resource in the CloudFormation template to add a DeletionPolicy property with a value of Empty.
  • D. Deletion has failed because the S3 bucket has an active website configuration. Modify the CloudFormation template to remove the Website Configuration properly from the S3 bucket resource.

正解：C


質問 # 33
An application is running on Amazon EC2. It has an attached IAM role that is receiving an AccessDenied error while trying to access a SecureString parameter resource in the AWS Systems Manager Parameter Store. The SecureString parameter is encrypted with a customer- managed Customer Master Key (CMK), What steps should the DevOps Engineer take to grant access to the role while granting least privilege? (Select three.)

  • A. Set kms:Decrypt for the instance role in the customer-managed CMK policy.
  • B. Set ssm:GetParamter for the parameter resource in the instance role's IAM policy.
  • C. Set kms:GenerateDataKey for the user on the AWS managed SSM KMS key.
  • D. Set kms:Decrypt for the customer-managed CMK resource in the role's IAM policy.
  • E. Set kms:Decrypt for the parameter resource in the customer-managed CMK policy.
  • F. Set ssm:DecryptParameter for the parameter resource in the instance role IAM policy.

正解：A、B、D

解説：
F is not right, no need to give access to the parameter resource.
Here we need below access:
1. Instance profile can get parameter from SSM, A provide
2. Instance profile can use CMK to decrypt the parameter, C provide
3. CMK policy allow instance to use CMK decrypt action, B provide


質問 # 34
There is a very serious outage at AWS. EC2 is not affected, but your EC2 instance deployment scripts stopped working in the region with the outage. What might be the issue?

  • A. AWS turns off the DeployCode API call when there are major outages, to protect from system floods.
  • B. The AWS Console is down, so your CLI commands do not work.
  • C. None of the other answers make sense. If EC2 is not affected, it must be some other issue.
  • D. S3 is unavailable, so you can't create EBS volumes from a snapshot you use to deploy new volumes.

正解：D

解説：
Explanation
The CBS Snapshots are stored in S3, so if you have an scripts which deploy CC2 Instances, the CBS volumes need to be constructed from snapshots stored in S3.
You can back up the data on your Amazon CBS volumes to Amazon S3 by taking point-in-time snapshots.
Snapshots are incremental backups, which means that only
the blocks on the device that have changed after your most recent snapshot are saved. This minimizes the time required to create the snapshot and saves on storage costs by not duplicating data. When you delete a snapshot, only the data unique to that snapshot is removed. Cach snapshot contains all of the information needed to restore your data (from the moment when the snapshot was taken) to a new CBS volume.
For more information on CBS Snapshots, please visit the below URL:
* http://docs.aws.amazon.com/AWSCC2/latest/UserGuide/CBSSnapshots.html


質問 # 35
You have an Auto Scaling group with 2 AZs. One AZ has 4 EC2 instances and the other has 3 EC2 instances.
None of the instances are protected from scale in. Based on the default Auto Scaling termination policy what
will happen?

  • A. Auto Scaling selects an instance to terminate randomly
  • B. Auto Scaling will select the AZ with 4 EC2 instances and terminate an instance.
  • C. Auto Scaling terminates which unprotected instances are closest to the next billing hour.
  • D. Auto Scaling will terminate unprotected instances in the Availability Zone with the oldest launch
    configuration.

正解：B

解説：
Explanation
The default termination policy is designed to help ensure that your network architecture spans Availability
Zones evenly. When using the default termination policy.
Auto Scaling selects an instance to terminate as follows:
Auto Scaling determines whether there are instances in multiple Availability Zones. If so, it selects the
Availability Zone with the most instances and at least one instance that is not protected from scale in. If there
is more than one Availability Zone with this number of instances. Auto Scaling selects the Availability Zone
with the instances that use the oldest launch configuration. For more information on Autoscaling instance
termination please refer to the below link:
* http://docs.aws.amazon.com/autoscaling/latest/userguide/as-instance-termi
nation.html


質問 # 36
You run a clustered NoSQL database on AWS EC2 using AWS EBS. You need to reduce latency for
database response times. Performance is the most important concern, not availability. You did not
perform the initial setup, someone without much AWS knowledge did, so you are not sure if they
configured everything optimally. Which of the following is NOT likely to be an issue contributing to
increased latency?

  • A. The EC2 instances are not EBS Optimized.
  • B. The database is not running in a placement group.
  • C. The EBS Volumes are not using PIOPS.
  • D. The database and requesting system are both in the wrong Availability Zone.

正解：D

解説：
For the highest possible performance, all instances in a clustered database like this one should be in a
single Availability Zone in a placement group, using EBS optimized instances, and using PIOPS SSD
EBS Volumes. The particular Availability Zone the system is running in should not be important, as long
as it is the same as the requesting resources.
Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/placement-groups.html


質問 # 37
A media customer has several thousand amazon EC2 instances in an AWS account. The customer is using a Slack channel for team communications and important updates. A DevOps Engineer was told to send all AWS-scheduled EC2 maintenance notifications to the company Slack channel.
Which method should the Engineer use to implement this process in the LEAST amount of steps?

  • A. Integrate AWS Personal Health Dashboard with Amazon CloudWatch Events. Based on the CloudWatch Events created, the event can invoke an AWS Lambda function to send notifications to the Slack channel.
  • B. Integrate AWS Support with AWS CloudTrail. Based on the CloudTrail lookup event created, the event can invoke an AWS Lambda function to pass EC2 maintenance notifications to the Slack channel.
  • C. Integrate EC2 events with Amazon CloudWatch monitoring. Based on the CloudWatch Alarm created, the alarm can invoke an AWS Lambda function to send EC2 maintenance notifications to the Slack channel.
  • D. Integrate AWS Trusted Advisor with AWS Config. Based on the AWS Config rules created, the AWS Config event can invoke an AWS Lambda function to send notifications to the Slack channel.

正解：A


質問 # 38
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. 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.
  • B. Using AWS CloudFormation, create a test stack for validating the code, and then deploy the code to each production Amazon EC2 instance.
  • C. Set up Amazon Route 53 health checks to fail over from any Amazon EC2 instance that is currently being deployed to.
  • D. 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.

正解：A


質問 # 39
......

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