Amazon AWS Certified Developer Associate DVA-C01 Exam

The AWS Certified Developer – Associate examination is intended for individuals who perform a development role and have one or more years of hands-on experience developing and maintaining an AWS-based application.
Abilities Validated by the Certification

Demonstrate an understanding of core AWS services, uses, and basic AWS architecture best practices
Demonstrate proficiency in developing, deploying, and debugging cloud-based applications using AWS

Recommended Knowledge and Experience
In-depth knowledge of at least one high-level programming language
Understanding of core AWS services, uses, and basic AWS architecture best practices
Proficiency in developing, deploying, and debugging cloud-based applications using AWS
Ability to use the AWS service APIs, AWS CLI, and SDKs to write applications
Ability to identify key features of AWS services
Understanding of the AWS shared responsibility model
Understanding of application lifecycle management
Ability to use a CI/CD pipeline to deploy applications on AWS
Ability to use or interact with AWS services
Ability to apply a basic understanding of cloud-native applications to write code
Ability to write code using AWS security best practices (e.g., not using secret and access keys in the code, instead using IAM roles)
Ability to author, maintain, and debug code modules on AWS
Proficiency writing code for serverless applications
Understanding of the use of containers in the development process

Prepare for Your Exam
There is no better preparation than hands-on experience. There are many relevant AWS Training courses and other resources to assist you with acquiring additional knowledge and skills to prepare for certification. Please review the exam guide for information about the competencies assessed on the certification exam.

Exam Content
Response Types
There are two types of questions on the examination:
 Multiple choice: Has one correct response and three incorrect responses (distractors).
 Multiple response: Has two or more correct responses out of five or more options.
Select one or more responses that best complete the statement or answer the question. Distractors, or incorrect answers, are response options that an examinee with incomplete knowledge or skill would likely choose. However, they are generally plausible responses that fit in the content area defined by the test objective.

Unanswered questions are scored as incorrect; there is no penalty for guessing.

Unscored Content
Your examination may include non-scored questions that are placed on the test to gather statistical information. These questions are not identified on the form, and do not affect your score.

Exam Results
The AWS Certified Developer – Associate (DVA-C01) examination is a pass or fail exam. The examination is scored against a minimum standard established by AWS professionals guided by certification industry best practices and guidelines.
Your results for the examination are reported as a score from 100–1,000, with a minimum passing score of 720. Your score shows how you performed on the examination as a whole and whether or not you passed. Scaled scoring models are used to equate scores across multiple exam forms that may have slightly different difficulty levels.
Your score report contains a table of classifications of your performance at each section level. This information is designed to provide general feedback concerning your examination performance. The examination uses a compensatory scoring model, which means that you do not need to “pass” the individual sections, only the overall examination. Each section of the examination has a specific weighting, so some sections have more questions than others. The table contains general information, highlighting your strengths and weaknesses. Exercise caution when interpreting section-level feedback.

Content Outline
This exam guide includes weightings, test domains, and objectives only. It is not a comprehensive listing of the content on this examination. The table below lists the main content domains and their weightings.

Domain % of Examination

Domain 1: Deployment 22%
Domain 2: Security 26%
Domain 3: Development with AWS Services 30%
Domain 4: Refactoring 10%
Domain 5: Monitoring and Troubleshooting 12%
TOTAL 100%

Domain 1: Deployment
1.1 Deploy written code in AWS using existing CI/CD pipelines, processes, and patterns
1.2 Deploy applications using Elastic Beanstalk
1.3 Prepare the application deployment package to be deployed to AWS
1.4 Deploy serverless applications

Domain 2: Security
2.1 Make authenticated calls to AWS services
2.2 Implement encryption using AWS services
2.3 Implement application authentication, and authorization

Domain 3: Development with AWS Services
3.1 Write code for serverless applications
3.2 Translate functional requirements into application design
3.3 Implement application design into application code
3.4 Write code that interacts with AWS services by using APIs, SDKs, and AWS CLI

Domain 4: Refactoring
4.1 Optimize application to best use AWS services and features
4.2 Migrate existing application code to run on AWS

Domain 5: Monitoring and Troubleshooting
5.1 Write code that can be monitored
5.2 Perform root cause analysis on faults found in testing or production

QUESTION 1
A Developer created a dashboard for an application using Amazon API Gateway, Amazon S3, AWS Lambda,
and Amazon RDS. The Developer needs an authentication mechanism allowing a user to sign in and view the
dashboard. It must be accessible from mobile applications, desktops, and tablets, and must remember user preferences across platforms.
Which AWS service should the Developer use to support this authentication scenario?

A. AWS KMS
B. Amazon Cognito
C. AWS Directory Service
D. Amazon IAM

Correct Answer: B

QUESTION 2
A Developer has created an S3 bucket s3://mycoolapp and has enabled server across logging that points
to the folder s3://mycoolapp/logs. The Developer moved 100 KB of Cascading Style Sheets (CSS)
documents to the folder s3://mycoolapp/css, and then stopped work. When the developer came back a
few days later, the bucket was 50 GB.
What is the MOST likely cause of this situation?

A. The CSS files were not compressed and S3 versioning was enabled.
B. S3 replication was enabled on the bucket.
C. Logging into the same bucket caused exponential log growth.
D. An S3 lifecycle policy has moved the entire CSS file to S3 Infrequent Access.

Correct Answer: B

QUESTION 3
A Developer is creating an Auto Scaling group whose instances need to publish a custom metric to Amazon CloudWatch.
Which method would be the MOST secure way to authenticate a CloudWatch PUT request?

A. Create an IAM user with PutMetricData permission and put the user credentials in a private repository; have applications pull the credentials as needed.
B. Create an IAM user with PutMetricData permission, and modify the Auto Scaling launch configuration to inject the user credentials into the instance user data.
C. Modify the CloudWatch metric policies to allow the PutMetricData permission to instances from the Auto Scaling group.
D. Create an IAM role with PutMetricData permission and modify the Auto Scaling launching configuration to launch instances using that role.

Correct Answer: D

QUESTION 4
A Developer has written a serverless application using multiple AWS services. The business logic is written as
a Lambda function which has dependencies on third-party libraries. The Lambda function endpoints will be
exposed using Amazon API Gateway. The Lambda function will write the information to Amazon DynamoDB.
The Developer is ready to deploy the application but must have the ability to rollback. How can this
deployment be automated, based on these requirements?

A. Deploy using Amazon Lambda API operations to create the Lambda function by providing a deployment package.
B. Use an AWS CloudFormation template and use CloudFormation syntax to define the Lambda function resource in the template.
C. Use syntax conforming to the Serverless Application Model in the AWS CloudFormation template to define the Lambda function resource.
D. Create a bash script which uses AWS CLI to package and deploy the application.
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Correct Answer: A

QUESTION 5
What are the steps to using the AWS CLI to launch a templatized serverless application?

A. Use AWS CloudFormation get-template then CloudFormation execute-change-set.
B. Use AWS CloudFormation validate-template then CloudFormation create-change-set.
C. Use AWS CloudFormation package then CloudFormation deploy.
D. Use AWS CloudFormation create-stack then CloudFormation update-stack.

Correct Answer: C

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