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Amazon DVA-C02 Exam Syllabus Topics:

Section	Weight	Objectives
Development with AWS Services	32%	- Develop code for applications hosted on AWS 1. Amazon S3 2. Amazon API Gateway 3. AWS CLI 4. AWS SDKs 5. AWS Lambda 6. Amazon SNS 7. Amazon Cognito 8. Amazon SQS 9. AWS CloudFormation 10. Amazon DynamoDB - Use data stores in application development 1. Amazon EFS 2. Amazon S3 3. Amazon RDS 4. Amazon ElastiCache 5. Amazon DynamoDB - Develop code for AWS serverless applications 1. Amazon API Gateway 2. AWS AppSync 3. Amazon EventBridge 4. AWS Step Functions
Troubleshooting and Optimization	18%	- Assist in a root cause analysis 1. Amazon CloudWatch Logs 2. Error handling and retries 3. Application logging 4. AWS X-Ray 5. AWS CloudTrail - Instrument code for observability 1. Amazon CloudWatch metrics 2. Custom metrics 3. Structured logging 4. Amazon CloudWatch alarms 5. AWS X-Ray - Optimize applications by using AWS services and features 1. Cost optimization 2. Memory and compute optimization 3. Caching strategies (ElastiCache, CloudFront) 4. Data storage optimization 5. Concurrency and throttling
Deployment	24%	- Prepare application artifacts to be deployed to AWS 1. Lambda deployment packages 2. AWS SAM 3. Docker containers 4. AWS CloudFormation 5. AWS CDK - Deploy code by using AWS CI/CD services 1. AWS CodePipeline 2. Rolling deployments 3. AWS CodeCommit 4. GitHub integration 5. AWS CodeDeploy 6. AWS CodeBuild 7. Canary deployments 8. Blue/green deployments - Test applications in development environments 1. AWS SAM local 2. Mocking AWS services 3. Local testing of Lambda functions - Automate deployment testing 1. AWS CodePipeline 2. AWS CodeCommit 3. AWS CodeDeploy 4. AWS CodeBuild
Security	26%	- Implement encryption by using AWS services 1. AWS Secrets Manager 2. AWS CloudHSM 3. AWS Certificate Manager 4. Amazon S3 encryption 5. AWS KMS - Implement authentication and/or authorization for applications and AWS services 1. Identity federation (SAML, OpenID Connect, Amazon Cognito) 2. Role-based access control (RBAC) 3. Bearer tokens (JWT, OAuth, AWS STS) 4. User pools and identity pools in Amazon Cognito 5. Resource-based policies, service policies, and principal policies - Manage sensitive data in application code 1. Environment variables 2. AWS Secrets Manager 3. Encryption of data at rest and in transit 4. AWS Systems Manager Parameter Store

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Amazon AWS Certified Developer - Associate Sample Questions (Q621-Q626):

NEW QUESTION # 621
A developer compiles an AWS Lambda function and packages the result as a .zip file. The developer uses the Functions page on the Lambda console to attempt to upload the local packaged .zip file. When pushing the package to Lambda, the console returns the following error:

Which solutions can the developer use to publish the code? (Choose two.)

A. Create an AWS Support ticket to increase the maximum package size.
B. Repackage the Lambda function as a Docker container image. Upload the image to Amazon Elastic Container Registry (Amazon ECR). Create a new Lambda function by using the Lambda console. Reference the image that is deployed to Amazon ECR.
C. Use the update-function-code AWS CLI command. Pass the --publish parameter.
D. Upload the package to Amazon 3. Use the Functions page on the Lambda console to upload the package from the S3 location.
E. Sign the .zip file digitally. Create a new Lambda function by using the Lambda console. Update the configuration of the new Lambda function to include the Amazon Resource Name (ARN) of the code signing configuration.

Answer: B,D

NEW QUESTION # 622
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? (Choose two.)

A. The file must be a JSON-formatted file named appspec.json.
B. The file must be stored in AWS CodeBuild and referenced from the application's source code.
C. The file must be placed in the root of the directory structure of the application's source code.
D. The file must be a YAML-formatted file named appspec.yml.
E. The file must be stored in Amazon S3 and referenced from the application's source code.

Answer: C,D

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.

NEW QUESTION # 623
A company has deployed infrastructure on AWS. A development team wants to create an AWS Lambda function that will retrieve data from an Amazon Aurora database. The Amazon Aurora database is in a private subnet in company's VPC. The VPC is named VPC1. The data is relational in nature. The Lambda function needs to access the data securely.
Which solution will meet these requirements?

A. Create the Lambda function. Configure VPC1 access for the function. Attach a security group named SG1 to both the Lambda function and the database. Configure the security group inbound and outbound rules to allow TCP traffic on Port 3306.
B. Create and launch a Lambda function in a new public subnet that is in a new VPC named VPC2. Create a peering connection between VPC1 and VPC2.
C. Export the data from the Aurora database to Amazon S3. Create and launch a Lambda function in VPC1. Configure the Lambda function query the data from Amazon S3.
D. Create the Lambda function. Configure VPC1 access for the function. Assign a security group named SG1 to the Lambda function. Assign a second security group named SG2 to the database. Add an inbound rule to SG1 to allow TCP traffic from Port 3306.

Answer: A

Explanation:
AWS Lambda is a service that lets you run code without provisioning or managing servers. Lambda functions can be configured to access resources in a VPC, such as an Aurora database, by specifying one or more subnets and security groups in the VPC settings of the function. A security group acts as a virtual firewall that controls inbound and outbound traffic for the resources in a VPC. To allow a Lambda function to communicate with an Aurora database, both resources need to be associated with the same security group, and the security group rules need to allow TCP traffic on Port 3306, which is the default port for MySQL databases. Reference: [Configuring a Lambda function to access resources in a VPC]

NEW QUESTION # 624
A video streaming company has a pipe in Amazon EventBridge Pipes that uses an Amazon Simple Queue Service (Amazon SQS) queue as an event source. The pipe publishes all source events to a target EventBridge event bus. Before events are published, the pipe uses an AWS Lambda function to retrieve the stream status of each event from a database and adds the stream status to each source event.
The company wants the pipe to publish events to the event bus only if the video stream has a status of ready.
Which solution will meet these requirements?

A. Include a filter for a status of ready in all EventBridge rules that subscribe to the event bus.
B. Update the Lambda function to return only video streams that have a status of ready.
C. Add a filter step to the pipe that will match on a stream status of ready.
D. Add an input transformer to the pipe output that filters streams that have a status of ready.

Answer: C

NEW QUESTION # 625
A developer is creating a simple proof-of-concept demo by using AWS CloudFormation and AWS Lambda functions. The demo will use a CloudFormation template to deploy an existing Lambda function. The Lambda function uses deployment packages and dependencies stored in Amazon S3. The developer defined an AWS::Lambda::Function resource in a CloudFormation template.
The developer needs to add the S3 bucket to the CloudFormation template.
What should the developer do to meet these requirements with the LEAST development effort?

A. Add the function code in the CloudFormation template inline as the code property.
B. Add the relevant key and bucket to the S3Bucket and S3Key properties in the CloudFormation template.
C. Add the function code in the CloudFormation template as the ZipFile property.
D. Find the S3 key for the Lambda function. Add the S3 key as the ZipFile property in the CloudFormation template.

Answer: D

NEW QUESTION # 626
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