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AWS DVA-C01 Exam Certification Details:

Number of Questions	65
Exam Price	$150 USD
Exam Name	AWS Developer Associate (AWS-CDA)
Recommended Training / Books	Developing on AWS

AWS-CDA Exam Syllabus Topics:

Section	Objectives
Deployment - 22%
Deploy written code in AWS using existing CI/CD pipelines, processes, and patterns.	- Commit code to a repository and invoke build, test and/or deployment actions - Use labels and branches for version and release management - Use AWS CodePipeline to orchestrate workflows against different environments - Apply AWS CodeCommit, AWS CodeBuild, AWS CodePipeline, AWS CodeStar, and AWS CodeDeploy for CI/CD purposes - Perform a roll back plan based on application deployment policy
Deploy applications using AWS Elastic Beanstalk.	- Utilize existing supported environments to define a new application stack - Package the application - Introduce a new application version into the Elastic Beanstalk environment - Utilize a deployment policy to deploy an application version (i.e., all at once, rolling, rolling with batch, immutable) - Validate application health using Elastic Beanstalk dashboard - Use Amazon CloudWatch Logs to instrument application logging
Prepare the application deployment package to be deployed to AWS.	- Manage the dependencies of the code module (like environment variables, config files and static image files) within the package - Outline the package/container directory structure and organize files appropriately - Translate application resource requirements to AWS infrastructure parameters (e.g., memory, cores)
Deploy serverless applications.	- Given a use case, implement and launch an AWS Serverless Application Model (AWS SAM) template - Manage environments in individual AWS services (e.g., Differentiate between Development, Test, and Production in Amazon API Gateway)
Security - 26%
Make authenticated calls to AWS services.	- Communicate required policy based on least privileges required by application. - Assume an IAM role to access a service - Use the software development kit (SDK) credential provider on-premises or in the cloud to access AWS services (local credentials vs. instance roles)
Implement encryption using AWS services.	- Encrypt data at rest (client side; server side; envelope encryption) using AWS services - Encrypt data in transit
Implement application authentication and authorization.	- Add user sign-up and sign-in functionality for applications with Amazon Cognito identity or user pools - Use Amazon Cognito-provided credentials to write code that access AWS services. - Use Amazon Cognito sync to synchronize user profiles and data- Use developer-authenticated identities to interact between end user devices, backend authentication, and Amazon Cognito
Development with AWS Services - 30%
Write code for serverless applications.	- Compare and contrast server-based vs. serverless model (e.g., micro services, stateless nature of serverless applications, scaling serverless applications, and decoupling layers of serverless applications) - Configure AWS Lambda functions by defining environment variables and parameters (e.g., memory, time out, runtime, handler) - Create an API endpoint using Amazon API Gateway - Create and test appropriate API actions like GET, POST using the API endpoint - Apply Amazon DynamoDB concepts (e.g., tables, items, and attributes) - Compute read/write capacity units for Amazon DynamoDB based on application requirements - Associate an AWS Lambda function with an AWS event source (e.g., Amazon API Gateway, Amazon CloudWatch event, Amazon S3 events, Amazon Kinesis) - Invoke an AWS Lambda function synchronously and asynchronously
Translate functional requirements into application design.	- Determine real-time vs. batch processing for a given use case - Determine use of synchronous vs. asynchronous for a given use case - Determine use of event vs. schedule/poll for a given use case - Account for tradeoffs for consistency models in an application design
Implement application design into application code.	- Write code to utilize messaging services (e.g., SQS, SNS) - Use Amazon ElastiCache to create a database cache - Use Amazon DynamoDB to index objects in Amazon S3 - Write a stateless AWS Lambda function - Write a web application with stateless web servers (Externalize state)
Write code that interacts with AWS services by using APIs, SDKs, and AWS CLI.	- Choose the appropriate APIs, software development kits (SDKs), and CLI commands for the code components - Write resilient code that deals with failures or exceptions (i.e., retries with exponential back off and jitter)
Refactoring - 10%

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Amazon AWS Certified Developer Associate Exam Sample Questions (Q299-Q304):

NEW QUESTION # 299
An organization is using Amazon CloudFront to ensure that its users experience low-latency access to its web application. The organization has identified a need to encrypt all traffic between users and CloudFront, and all traffic between CloudFront and the web application.
How can these requirements be met? (Choose two.)

• A. Enable the CloudFront option Restrict Viewer Access.
• B. Set the Origin Protocol Policy to "HTTPS Only".
• C. Set the Viewer Protocol Policy to "HTTPS Only" or "Redirect HTTP to HTTPS".
• D. Set the Origin's HTTP Port to 443.
• E. Use AWS KMS to encrypt traffic between CloudFront and the web application.

Answer: B,C Explanation:
Explanation
https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/using-https-viewers-to-cloudfront.html
https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/using-https-cloudfront-to-custom-origi
NEW QUESTION # 300
When uploading an object, what request header can be explicitly specified in a request to Amazon S3 to encrypt object data when saved on the server side?

• A. Content-MD5
• B. x-amz-server-side-encryption
• C. x-amz-security-token
• D. x-amz-storage-class

Answer: B Explanation:
Explanation
https://docs.aws.amazon.com/AmazonS3/latest/dev/UsingServerSideEncryption.html#APISupportforServer-Side
NEW QUESTION # 301
An organization is storing large files in Amazon S3, and is writing a web application to display meta-data about the files to end-users. Based on the metadata a user selects an object to download. The organization needs a mechanism to index the files and provide single-digit millisecond latency retrieval for the metadata.
What AWS service should be used to accomplish this?

• A. Amazon DynamoDB
• B. AWS Lambda
• C. Amazon RDS
• D. Amazon EC2

Answer: A Explanation:
Explanation
Amazon DynamoDB is a fast and flexible NoSQL database service for all applications that need consistent, single-digit millisecond latency at any scale. It is a fully managed database and supports both document and key-value data models. Its flexible data model and reliable performance make it a great fit for mobile, web, gaming, ad-tech, Internet of Things (IoT), and many other applications.
References:
NEW QUESTION # 302
An application is running on an EC2 instance. The Developer wants to store an application metric in Amazon CloudWatch.
What is the best practice for implementing this requirement?

• A. Use the CloudWatch PutMetricData API call to submit a custom metric to CloudWatch. Launch the EC2 instance with the required IAM role to enable the API call.
• B. Use the PUT Object API call to send data to an S3 bucket. Use an event notification to invoke a Lambda function to publish data to CloudWatch.
• C. Publish the metric data to an Amazon Kinesis Stream using a PutRecord API call. Subscribe a Lambda function that publishes data to CloudWatch.
• D. Use the CloudWatch PutMetricData API call to submit a custom metric to CloudWatch. Provide the required credentials to enable the API call.

Answer: A Explanation:
Explanation
https://docs.aws.amazon.com/IAM/latest/UserGuide/idrolesuse_switch-role-ec2.html
NEW QUESTION # 303
A developer at a company writes an AWS ClojdForination template. The template refers to subnets that were created by a separate AWS Cloud Formation template that the company's network team wrote. When the developer attempts to launch the stack for the first time, the launch fails.
Which template coding mistakes could have caused this failure? (Select TWO.)

• A. The Mappings section of the developer's template does not refer to the subnets.
• B. The network team's template does not export the subnets in the Outputs section
• C. The network team's template does not export the subnets in the Mappings section
• D. The developer's template does not use the ImportValue intrinsic function to refer to the subnets
• E. The developer's template does not use the Ref intrinsic function to refer to the subnets

Answer: B,D
NEW QUESTION # 304
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