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Amazon DVA-C02 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: Deployment24%- Prepare application artifacts for deployment
  • 1. Package code and dependencies
  • 2. Use infrastructure as code (AWS CloudFormation, AWS SAM)
- Deploy applications on AWS
  • 1. Deploy to AWS Lambda, Amazon EC2, Elastic Beanstalk
  • 2. Perform safe updates and rollbacks
- Implement CI/CD pipelines
  • 1. Automate deployment and testing workflows
  • 2. Use AWS CodePipeline, CodeBuild, CodeDeploy
Topic 2: Security26%- Apply security best practices
  • 1. Follow AWS Well-Architected Framework security principles
  • 2. Validate application security configurations
- Secure application data
  • 1. Manage secrets and credentials securely
  • 2. Implement encryption at rest and in transit
- Implement authentication and authorization
  • 1. Use Amazon Cognito for identity management
  • 2. Manage IAM roles, policies, and permissions
Topic 3: Troubleshooting and Optimization18%- Debug and resolve errors
  • 1. Identify and fix code defects
  • 2. Resolve integration and configuration problems
- Optimize application performance
  • 1. Improve latency and throughput
  • 2. Optimize resource usage and costs
- Troubleshoot application issues
  • 1. Analyze logs, metrics, and traces
  • 2. Use Amazon CloudWatch, AWS X-Ray for monitoring
Topic 4: Development with AWS Services32%- Interact with AWS data services
  • 1. Work with Amazon DynamoDB, Amazon S3
  • 2. Implement caching and data storage strategies
- Write code for applications hosted on AWS
  • 1. Use AWS SDKs and APIs
  • 2. Implement architectural patterns
  • 3. Develop serverless applications
- Integrate AWS services into applications
  • 1. Implement messaging and event-driven workflows
  • 2. Use AWS Lambda, API Gateway, Amazon EventBridge

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Amazon AWS Certified Developer - Associate Sample Questions (Q160-Q165):

NEW QUESTION # 160
A company has a monolithic desktop-based application that processes images. A developer is converting the application into an AWS Lambda function by using Python. Currently, the desktop application runs every 5 minutes to process the latest image from an Amazon S3 bucket. The desktop application completes the image processing task within 1 minute.
During testing on AWS, the developer notices that the Lambda function runs at the specified 5-minute interval. However, the Lambda function takes more than 2 minutes to complete the image processing task.
The developer needs a solution that will improve the Lambda function ' s performance.
Which solution will meet this requirement?

Answer: A

Explanation:
Lambda does not allow the developer to select an EC2 instance type, so option A is invalid. For Lambda, CPU allocation scales proportionally with memory. If the image-processing workload is CPU-bound or memory-constrained, increasing the configured memory can also increase available CPU power and reduce execution duration. Updating the Python runtime may provide minor improvements but is not the primary Lambda performance control. Reserved concurrency controls how many concurrent executions are reserved for the function; it does not make one invocation process faster. The issue is that each run takes too long, not that the function lacks concurrency. AWS Lambda documentation confirms that increasing function memory also increases CPU allocation, and memory can be tuned to improve performance. ( AWS Documentation )


NEW QUESTION # 161
A company runs a critical application on AWS. The application uses credentials to access an Amazon RDS database.
As part of a risk assessment to analyze security vulnerabilities, the company found that database credentials are not frequently rotated. A developer needs to implement a solution that securely stores and rotates the credentials. The solution must not expose the credentials to anyone who should not have access to the credentials.
Which solution will meet these requirements?

Answer: B

Explanation:
AWS Secrets Manager provides a secure vault for your database credentials and natively supports managed rotation for Amazon RDS. By storing the credentials in Secrets Manager and enabling automatic rotation, the service handles secure retrieval by your application and rotates the credentials on schedule without exposing them to unauthorized users.


NEW QUESTION # 162
A company is building a scalable data management solution by using AWS services to improve the speed and agility of development. The solution will ingest large volumes of data from various sources and will process this data through multiple business rules and transformations.
The solution requires business rules to run in sequence and to handle reprocessing of data if errors occur when the business rules run. The company needs the solution to be scalable and to require the least possible maintenance.
Which AWS service should the company use to manage and automate the orchestration of the data flows to meet these requirements?

Answer: A

Explanation:
https://docs.aws.amazon.com/step-functions/latest/dg/welcome.html


NEW QUESTION # 163
A company has a web application that is hosted on Amazon EC2 instances The EC2 instances are configured to stream logs to Amazon CloudWatch Logs The company needs to receive an Amazon Simple Notification Service (Amazon SNS) notification when the number of application error messages exceeds a defined threshold within a 5-minute period Which solution will meet these requirements?

Answer: D

Explanation:
* CloudWatch for Log Analysis: CloudWatch is the best fit here because logs are already centralized.
Here's the process:
* Metric Filter: Create a metric filter on the CloudWatch Logs log group. Design a pattern to specifically identify application error messages.
* Custom Metric: This filter generates a new custom CloudWatch metric (e.g., ApplicationErrors).
This metric tracks the error count.
* CloudWatch Alarm: Create an alarm on the ApplicationErrors metric. Configure the alarm with your desired threshold and a 5-minute evaluation period.
* SNS Action: Set the alarm to trigger an SNS notification when it enters the alarm state.
References:
* CloudWatch Metric Filters: https://docs.aws.amazon.com/AmazonCloudWatch/latest/logs
/MonitoringLogData.html
* CloudWatch Alarms: https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring
/AlarmThatSendsEmail.html


NEW QUESTION # 164
A company maintains an application responsible for processing several thousand external callbacks each day. The company's system administrators want to know how many callbacks are being received on a rolling basis, and they want this data available for 10 days.
The company also wants the ability to issue automated alerts if the number of callbacks exceeds the defined thresholds.
What is the MOST cost-effective way to address the need to track and alert on these statistics?

Answer: D

Explanation:
Amazon CloudWatch custom metrics are the most cost-effective fit for tracking callback counts over time and retaining the data for the required period. CloudWatch alarms can automatically notify administrators when callback volume exceeds defined thresholds without requiring a custom storage, query, or alerting system.


NEW QUESTION # 165
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