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Amazon DVA-C02 Certification Exam is ideal for developers who are already familiar with AWS services and want to enhance their skills in designing and developing AWS applications. AWS Certified Developer - Associate certification validates the knowledge and skills required to build and deploy cloud-based applications using AWS services such as AWS Lambda, Amazon DynamoDB, Amazon S3, and more.

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The DVA-C02 Exam is an associate-level certification, which means that candidates should have a good understanding of AWS services and be able to demonstrate their knowledge of AWS best practices. DVA-C02 exam covers a wide range of topics, including AWS core services, security, and deployment. It also covers topics such as how to design and develop scalable AWS applications, how to troubleshoot issues, and how to optimize application performance.

Amazon AWS Certified Developer - Associate Sample Questions (Q767-Q772):

NEW QUESTION # 767
A company has an AWS Step Functions state machine named myStateMachine. The company configured a service role for Step Functions.
The developer must ensure that only the myStateMachine state machine can assume the service role.
Which statement should the developer add to the trust policy to meet this requirement?

Answer: B

Explanation:
The ArnLike condition with aws:SourceArn specifically matches the ARN of the myStateMachine state machine. It restricts access to only the specific state machine with the ARN arn:aws:states:ap-south-1:111111111111:stateMachine:myStateMachine.

NEW QUESTION # 768
A developer is working on an ecommerce website The developer wants to review server logs without logging in to each of the application servers individually. The website runs on multiple Amazon EC2 instances, is written in Python, and needs to be highly available How can the developer update the application to meet these requirements with MINIMUM changes?

A. Scale down the application to one larger EC2 instance where only one instance is recording logs
B. Rewrite the application to be cloud native and to run on AWS Lambda, where the logs can be reviewed in Amazon CloudWatch
C. Set up centralized logging by using Amazon OpenSearch Service, Logstash, and OpenSearch Dashboards
D. Install the unified Amazon CloudWatch agent on the EC2 instances Configure the agent to push the application logs to CloudWatch

Answer: D

Explanation:
* Centralized Logging Benefits: Centralized logging is essential for operational visibility in scalable systems, especially those using multiple EC2 instances like our e-commerce website. CloudWatch provides this capability, along with other monitoring features.
* CloudWatch Agent: This is the best way to send custom application logs from EC2 instances to CloudWatch. Here's the process:
* Install the CloudWatch agent on each EC2 instance.
* Configure the agent with a configuration file, specifying:
* Which log files to collect.
* The format in which to send logs to CloudWatch (e.g., JSON).
* The specific CloudWatch Logs log group and log stream for these logs.
* Viewing and Analyzing Logs: Once the agent is pushing logs, use the CloudWatch Logs console or API:
* View and search the logs across all instances.
* Set up alarms based on log events.
* Use CloudWatch Logs Insights for sophisticated queries and analysis.
References:
Amazon CloudWatch Logs: https://docs.aws.amazon.com/AmazonCloudWatch/latest/logs
/WhatIsCloudWatchLogs.html
Unified CloudWatch Agent: https://docs.aws.amazon.com/AmazonCloudWatch/latest/logs/AgentReference.
html
CloudWatch Logs Insights: https://docs.aws.amazon.com/AmazonCloudWatch/latest/logs/AnalyzingLogData.
html

NEW QUESTION # 769
A developer deploys a custom application to three Amazon EC2 instances. The application processes messages from an Amazon Simple Queue Service (Amazon SQS) standard queue with default settings. When the developer runs a load test on the Amazon SQS queue, the developer discovers that the application processes many messages multiple times.
How can the developer ensure that the application processes each message exactly once?

A. Increase the DelaySeconds value on the current SQS queue.
B. Process the messages on one EC2 instance instead of three instances.
C. Create a new SQS FIFO queue. Point the application to the new queue.
D. Modify the SQS standard queue to an SQS FIFO queue.

Answer: C

Explanation:
https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/FIFO- queues-moving.html Moving from a standard queue to a FIFO queue:
If you have an existing application that uses standard queues and you want to take advantage of the ordering or exactly-once processing features of FIFO queues, you need to configure the queue and your application correctly.
Note:
You can't convert an existing standard queue into a FIFO queue. To make the move, you must either create a new FIFO queue for your application or delete your existing standard queue and recreate it as a FIFO queue.

NEW QUESTION # 770
A developer must use multi-factor authentication (MFA) to access data in an Amazon S3 bucket that is in another AWS account.
Which AWS Security Token Service (AWS STS) API operation should the developer use with the MFA information to meet this requirement?

A. AssumeRoleWithSAML
B. AssumeRoleWithWebIdentity
C. GetFederationToken
D. AssumeRole

Answer: C

NEW QUESTION # 771
A developer is launching a global application that delivers content to multiple countries. The developer needs to serve specific content based on the country of each user and each user's primary language. The developer must ensure that content is served reliably and with low latency.
Which solution will meet these requirements?

A. Store the content in a centralized Amazon S3 bucket. Enable S3 Transfer Acceleration on the bucket. Create an Amazon Route 53 hosted zone that includes the endpoint for the S3 bucket.
Create records in Route 53 that use geoproximity and geolocation routing policies.
B. Create an Amazon API Gateway REST API. Connect the REST API to AWS WAF. Use geo match statements and regex match statements to allow or deny requests based on the labels returned from web request evaluations.
C. Create an Amazon API Gateway REST API. Create an AWS Global Accelerator standard accelerator to resolve requests to the API. Configure endpoint groups on the accelerator. Attach listeners for each country and language.
D. Configure an Amazon CloudFront distribution that uses the application as an origin. Configure the distribution to forward the Accept-Language header and the CloudFront-Viewer-Country header to the origin.

Answer: D

NEW QUESTION # 772
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