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Amazon DVA-C02 (AWS Certified Developer - Associate) Certification Exam is an exam designed for professionals who want to demonstrate their expertise in developing and maintaining applications on the Amazon Web Services (AWS) platform. AWS Certified Developer - Associate certification exam is ideal for developers who are experienced in AWS technologies and are looking to validate their skills and knowledge by obtaining a globally recognized certification.
Amazon DVA-C02 Exam covers a range of topics related to AWS development, including AWS core services like EC2, S3, and RDS, as well as application services like AWS Lambda, Amazon API Gateway, and AWS Elastic Beanstalk. DVA-C02 exam also covers topics related to security, best practices for developing applications on AWS, and troubleshooting common issues. DVA-C02 exam consists of multiple-choice questions, and candidates have 130 minutes to complete it.
NEW QUESTION # 272
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 EC2 instances 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?
Answer: A
Explanation:
Explanation
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.
References: AWS Elastic Beanstalk Deployment Policies
NEW QUESTION # 273
A developer is building an ecommerce application that uses multiple AWS Lambda functions. Each function performs a specific step in a customer order workflow, such as order processing and inventory management.
The developer must ensure that the Lambda functions run in a specific order.
Which solution will meet this requirement with the LEAST operational overhead?
Answer: A
Explanation:
The requirement here is to ensure that Lambda functions are executed in a specific order. AWS Step Functions is a low-code workflow orchestration service that enables you to sequence AWS services, such as AWS Lambda, into workflows. It is purpose-built for situations like this, where different steps need to be executed in a strict sequence.
AWS Step Functions: Step Functions allows developers to design workflows as state machines, where each state corresponds to a particular function. In this case, the developer can create a Step Functions state machine where each step (order processing, inventory management, etc.) is represented by a Lambda function.
Operational Overhead: Step Functions have very low operational overhead because it natively handles retries, error handling, and function sequencing.
Alternatives:
Amazon SQS (Option A): While SQS can manage message ordering, it requires more manual handling of each step and the logic to sequentially invoke the Lambda functions.
Amazon SNS (Option B): SNS is a pub/sub service and is not designed to handle sequences of Lambda executions.
EventBridge (Option D): EventBridge Scheduler allows you to invoke Lambda functions based on scheduled times, but it doesn't directly support sequencing based on workflow logic.
Therefore, AWS Step Functions is the most appropriate solution due to its native orchestration capabilities and minimal operational complexity.
Reference:
AWS Step Functions documentation
NEW QUESTION # 274
A company developed an API application on AWS by using Amazon CloudFront, Amazon API Gateway, and AWS Lambda. The API has a minimum of four requests every second. A developer notices that many API users run the same query by using the POST method. The developer wants to cache the POST request to optimize the API resources.
Which solution will meet these requirements?
Answer: A
Explanation:
Explanation
Amazon API Gateway provides tools for creating and documenting web APIs that route HTTP requests to Lambda functions2. You can secure access to your API with authentication and authorization controls. Your APIs can serve traffic over the internet or can be accessible only within your VPC2. You can override the cache method in the selected stage of API Gateway2. Therefore, option B is correct.
NEW QUESTION # 275
A web application is using Amazon Kinesis Data Streams for clickstream data that may not be consumed for up to 12 hours.
How can the developer implement encryption at rest for data within the Kinesis Data Streams?
Answer: D
NEW QUESTION # 276
A developer created an AWS Lambda function that performs a series of operations that involve multiple AWS services. The function's duration time is higher than normal. To determine the cause of the issue, the developer must investigate traffic between the services without changing the function code.
Which solution will meet these requirements?
Answer: C
NEW QUESTION # 277
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