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Amazon DOP-C02

AWS Certified DevOps Engineer - Professional

Verified practice questions with detailed answers, clear explanations, and community discussion.

  • 460

    questions

  • 5 days ago

    last updated

  • 4.8/5

    overall rating

Question 1 of 460

A company has a mobile application that makes HTTP API calls to an Application Load Balancer (ALB). The ALB routes requests to an AWS Lambda function. Many different versions of the application are in use at any given time, including versions that are in testing by a subset of users. The version of the application is defined in the user-agent header that is sent with all requests to the API.

After a series of recent changes to the API, the company has observed issues with the application. The company needs to gather a metric for each API operation by response code for each version of the application that is in use. A DevOps engineer has modified the Lambda function to extract the API operation name, version information from the user-agent header and response code.

Which additional set of actions should the DevOps engineer take to gather the required metrics?

Answer choices
Show answer

Correct answer: A

The best approach for gathering metrics with minimal complexity is to modify the Lambda function to log the API operation name, response code, and version number to Amazon CloudWatch Logs. Then, configure a CloudWatch Logs metric filter to increment a metric for each API operation. By specifying response code and application version as dimensions, this method efficiently captures the necessary metrics and leverages existing AWS services directly, making it a simple and effective solution for the given requirements.

Community votes

38 votes

ASuggested

87%

B

8%

D

5%

Question 2 of 460

A company provides an application to customers. The application has an Amazon API Gateway REST API that invokes an AWS Lambda function. On initialization, the Lambda function loads a large amount of data from an Amazon DynamoDB table. The data load process results in long cold-start times of 8-10 seconds. The DynamoDB table has DynamoDB Accelerator (DAX) configured.

Customers report that the application intermittently takes a long time to respond to requests. The application receives thousands of requests throughout the day. In the middle of the day, the application experiences 10 times more requests than at any other time of the day. Near the end of the day, the application's request volume decreases to 10% of its normal total.

A DevOps engineer needs to reduce the latency of the Lambda function at all times of the day.

Which solution will meet these requirements?

Answer choices
Show answer

Correct answer: C

To reduce the latency of the Lambda function at all times of the day, the best solution is configuring provisioned concurrency on the Lambda function along with configuring AWS Application Auto Scaling. Provisioned concurrency ensures that a predetermined number of Lambda function instances are always initialized and ready to respond, thereby mitigating cold start delays. Implementing auto-scaling allows the function to dynamically adjust the number of provisioned concurrent instances based on the application's varying load throughout the day, thus efficiently handling traffic spikes and minimizing costs during low-traffic periods.

Community votes

17 votes

CSuggested

100%

Question 3 of 460

A company is adopting AWS CodeDeploy to automate its application deployments for a Java-Apache Tomcat application with an Apache Webserver. The development team started with a proof of concept, created a deployment group for a developer environment, and performed functional tests within the application. After completion, the team will create additional deployment groups for staging and production.

The current log level is configured within the Apache settings, but the team wants to change this configuration dynamically when the deployment occurs, so that they can set different log level configurations depending on the deployment group without having a different application revision for each group.

How can these requirements be met with the LEAST management overhead and without requiring different script versions for each deployment group?

Answer choices
Show answer

Correct answer: B

To address the requirement of dynamically changing the log level configuration based on the deployment group with minimal management overhead, the most effective approach is to use the CodeDeploy environment variable DEPLOYMENT_GROUP_NAME. This variable can be used by a script to identify the deployment group the instance belongs to and adjust the log level settings accordingly. By referencing this script as part of the BeforeInstall lifecycle hook in the appspec.yml file, it ensures the settings are configured before the application files are installed, maintaining a single script version across all deployment groups.

Community votes

15 votes

BSuggested

73%

D

27%

Question 4 of 460

A company requires its developers to tag all Amazon Elastic Block Store (Amazon EBS) volumes in an account to indicate a desired backup frequency. This requirement Includes EBS volumes that do not require backups. The company uses custom tags named Backup_Frequency that have values of none, dally, or weekly that correspond to the desired backup frequency. An audit finds that developers are occasionally not tagging the EBS volumes.

A DevOps engineer needs to ensure that all EBS volumes always have the Backup_Frequency tag so that the company can perform backups at least weekly unless a different value is specified.

Which solution will meet these requirements?

Answer choices
Show answer

Correct answer: D

To ensure that all EBS volumes always have the Backup_Frequency tag, the best solution is to use AWS CloudTrail in combination with Amazon EventBridge to react to specific EBS volume events. The solution should be able to handle both the creation and modification of EBS volumes to apply the Backup_Frequency tag correctly. This can be achieved by creating an EventBridge rule that reacts to EBS CreateVolume events or EBS ModifyVolume events. Then, a custom AWS Systems Manager Automation runbook can be configured to apply the Backup_Frequency tag with a value of weekly and specified as the target of the rule. This approach ensures that the tag is applied immediately upon the creation or modification of any EBS volume, meeting the requirement for continuous tagging compliance.

Community votes

24 votes

BMost voted

96%

DSuggested

4%

Question 5 of 460

A company is using an Amazon Aurora cluster as the data store for its application. The Aurora cluster is configured with a single DB instance. The application performs read and write operations on the database by using the cluster's instance endpoint.

The company has scheduled an update to be applied to the cluster during an upcoming maintenance window. The cluster must remain available with the least possible interruption during the maintenance window.

What should a DevOps engineer do to meet these requirements?

Answer choices
Show answer

Correct answer: A

The best approach to keep the Aurora cluster available with minimal interruption during a maintenance window is to add a reader instance to the Aurora cluster and update the application to use the appropriate endpoints: the cluster endpoint for write operations and the reader endpoint for read operations. This configuration allows read operations to be offloaded to the reader instance, thereby reducing the load on the primary instance and ensuring that reads can continue even if the primary instance is undergoing maintenance. The Multi-AZ option on Amazon Aurora needs to be set at the time of cluster creation, not afterward, which makes it not applicable in this scenario. Therefore, the correct solution is to add a reader instance for increased availability and load balancing during maintenance.

Community votes

62 votes

ASuggested

74%

C

16%

B

5%

D

5%

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As this was my first certification exam, I was understandably nervous about what to expect. These study materials made the preparation process much easier, and many of the questions closely reflected those on the actual exam.
Charles Sirois
Canada
May 5, 2026
Wasted about a month going through the free dump sites scattered all over reddit, half the answers were wrong and the other half were for a version of the exam that doesn't even exist anymore. Eventually gave in and paid the small fee here, and the difference was night and day.
Lance Chambers
United States
Apr 11, 2026
Honestly, I had already gone through the official documentation quite thoroughly, but still didn't feel fully confident going in. This helped things finally click for me. I realized I knew the material, but just hadn't connected all the pieces yet.
Alisha Kelly
Italy
Apr 9, 2026
Used this along with Microsoft Learn and the combo worked really well. The practice questions made the stuff I'd read actually stick. Passed first attempt, no complaints from me.
Casper Claassen
Netherlands
Jun 2, 2025
The content is accurate and clearly presented, and it's more affordable than competitors. The team has been incredibly responsive whenever I've had an issue, and they've been open to small changes that improve the platform.
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Italy
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I don't usually leave reviews, but this one felt worth sharing. The questions were quite close to what actually appeared on the exam, more than I expected. I spent about a week going through the material before my test, and it helped me feel more prepared.
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I don't usually leave reviews, but this one felt worth sharing. The questions were quite close to what actually appeared on the exam, more than I expected. I spent about a week going through the material before my test, and it helped me feel more prepared.
Morgan Farmer
United Kingdom
May 4, 2026
Passed ITIL 4 Foundation with 87%. Material was enough by itself.
Remi Nuyts
United States
Apr 9, 2026
I had a smooth experience from start to finish. Access was available right away, no technical issues, which made it easy to get started. The content felt relevant and aligned well with what I was looking for.
Archie Hopkins
United States
Apr 11, 2026
Does what it says it does. Content felt solid, nothing confusing to navigate and I didn't run into any weird issues. I been putting off scheduling the exam for a while and going through this gave me enough confidence to finally book it and pass.
Nancy Mcbride
United States
May 8, 2026
A very quick response was received via email when a link issue occurred. The study materials provided were high quality and extremely helpful. I was able to complete the test successfully. Many thanks for the excellent support.
Neil Savage
United States

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