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| Certification Vendor: | Amazon Web Services (AWS) |
|---|---|
| Exam Name: | AWS Certified Developer - Associate |
| Exam Number: | DVA-C02 |
| Exam Price: | 150 USD |
| Certificate Validity Period: | 3 years |
| Passing Score: | 720 (scaled score of 100–1,000) |
| Exam Duration: | 130 minutes |
| Available Languages: | Simplified Chinese, Spanish (Latin America), Korean, Japanese, Portuguese (Brazil), English |
| Related Certifications: | AWS Certified DevOps Engineer - Professional AWS Certified Cloud Practitioner |
| Exam Format: | Multiple response, Multiple choice |
| Real Exam Qty: | 65 (50 scored, 15 unscored) |
| Sample Questions: | Amazon DVA-C02 Sample Questions |
| Exam Way: | Pearson VUE testing center or online proctored exam |
| Pre Condition: | Recommended 1 or more years of hands-on experience in developing and maintaining applications using AWS services. Proficiency in at least one high-level programming language. |
| Official Syllabus URL: | https://aws.amazon.com/certification/certified-developer-associate/ |
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Amazon DVA-C02 (AWS Certified Developer - Associate) Examは、Amazon Web Services（AWS）プラットフォームの認定開発者になりたいと考えている個人向けに設計された認定試験です。この試験は、AWS上でアプリケーションを開発およびメンテナンスする経験がある個人、およびAWSサービスおよびアーキテクチャについて堅固な理解を持っている個人を対象としています。DVA-C02試験は、AWSサービスおよびツールを使用してクラウドベースのソリューションを設計、開発、展開する能力を個人が検証します。
質問 # 658
A developer is using AWS CodeDeploy to automate a company's application deployments to Amazon EC2.
Which application specification file properties are required to ensure the software deployments do not fail?
(Select TWO.)
正解：C、E
解説：
Comprehensive and Detailed Step-by-Step Explanation:
To ensure successful software deployments using AWS CodeDeploy, the application specification file (appspec.yml or appspec.json) must adhere to specific requirements:
File Format Requirement (Option B):
The appspec.yml file is a YAML-formatted file required for defining deployment actions and file locations.
This is the modern and recommended format for application specification files.
It can also be a JSON-formatted file named appspec.json, but YAML is most commonly used and accepted.
File Placement Requirement (Option D):
The application specification file must reside in the root directory of the application's source code. This is necessary so that AWS CodeDeploy can detect and use the file during deployment.
Incorrect Options:
Option A: While a JSON-formatted file (appspec.json) is valid, this is not a mandatory requirement. YAML is also acceptable, and this option does not account for it.
Option C: The application specification file is not required to be stored in AWS CodeBuild; it must be included in the source code's directory structure.
Option E: The application specification file does not need to be stored in Amazon S3. S3 is commonly used for application artifacts, but the appspec.yml or appspec.json file must exist within the deployment package or source code root.
References:
AWS CodeDeploy User Guide: Application Specification File
質問 # 659
A developer is storing sensitive data generated by an application in Amazon S3. The developer wants to encrypt the data at rest. A company policy requires an audit trail of when the AWS Key Management Service (AWS KMS) key was used and by whom.
Which encryption option will meet these requirements?
正解：B
解説：
Explanation
This solution meets the requirements because it encrypts data at rest using AWS KMS keys and provides an audit trail of when and by whom they were used. Server-side encryption with AWS KMS managed keys (SSE-KMS) is a feature of Amazon S3 that encrypts data using keys that are managed by AWS KMS. When SSE-KMS is enabled for an S3 bucket or object, S3 requests AWS KMS to generate data keys and encrypts data using these keys. AWS KMS logs every use of its keys in AWS CloudTrail, which records all API calls to AWS KMS as events. These events include information such as who made the request, when it was made, and which key was used. The company policy can use CloudTrail logs to audit critical events related to their data encryption and access. Server-side encryption with Amazon S3 managed keys (SSE-S3) also encrypts data at rest using keys that are managed by S3, but does not provide an audit trail of key usage. Server-side encryption with customer-provided keys (SSE-C) and server-side encryption with self-managed keys also encrypt data at rest using keys that are provided or managed by customers, but do not provide an audit trail of key usage and require additional overhead for key management.
質問 # 660
A developer wants to expand an application to run in multiple AWS Regions. The developer wants to copy Amazon Machine Images (AMIs) with the latest changes and create a new application stack in the destination Region. According to company requirements, all AMIs must be encrypted in all Regions. However, not all the AMIs that the company uses are encrypted.
How can the developer expand the application to run in the destination Region while meeting the encryption requirement?
正解：C
解説：
Amazon Machine Images (AMIs) are encrypted snapshots of EC2 instances that can be used to launch new instances. The developer can create new AMIs from the existing instances and specify encryption parameters.
The developer can copy the encrypted AMIs to the destination Region and use them to create a new application stack. The developer can delete the unencrypted AMIs after the encryption process is complete.
This solution will meet the encryption requirement and allow the developer to expand the application to run in the destination Region.
References:
* [Amazon Machine Images (AMI) - Amazon Elastic Compute Cloud]
* [Encrypting an Amazon EBS Snapshot - Amazon Elastic Compute Cloud]
* [Copying an AMI - Amazon Elastic Compute Cloud]
質問 # 661
A developer is creating an AWS Lambda function. The Lambda function needs an external library to connect to a third-party solution The external library is a collection of files with a total size of 100 MB The developer needs to make the external library available to the Lambda execution environment and reduce the Lambda package space Which solution will meet these requirements with the LEAST operational overhead?
正解：D
解説：
Explanation
Create a Lambda layer to store the external library. Configure the Lambda function to use the layer. This will allow the developer to make the external library available to the Lambda execution environment without having to include it in the Lambda package, which will reduce the Lambda package space. Using a Lambda layer is a simple and straightforward solution that requires minimal operational overhead.
https://docs.aws.amazon.com/lambda/latest/dg/configuration-layers.html
質問 # 662
A company has deployed an application on AWS Elastic Beanstalk. The company has configured the Auto Scaling group that is associated with the Elastic Beanstalk environment to have five Amazon EC2 instances.
If the capacity is fewer than four EC2instances during the deployment, application performance degrades. The company is using the all-at-once deployment policy.
What is the MOST cost-effective way to solve the deployment issue?
正解：B
解説：
This solution will solve the deployment issue by deploying the new version of the application to one new EC2 instance at a time, while keeping the old version running on the existing instances. This way, there will always be at least four instances serving traffic during the deployment, and no downtime or performance degradation will occur. Option A is not optimal because it will increase the cost of running the Elastic Beanstalk environment without solving the deployment issue. Option B is not optimal because it will split the traffic between two versions of the application, which may cause inconsistency and confusion for the customers. Option D is not optimal because it will deploy the new version of the application to two existing instances at a time, which may reduce the capacity below four instances during the deployment.
質問 # 663
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