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The Amazon DVA-C01 (AWS Certified Developer Associate) Exam is a certification exam offered by Amazon Web Services (AWS) for developers who are interested in showcasing their expertise in designing and deploying cloud-based applications using AWS services. The exam is designed to test the candidate's knowledge and skills in a variety of areas such as Amazon Simple Storage Service (S3), Amazon DynamoDB, AWS Lambda, Amazon Simple Notification Service (SNS), and more. Passing this exam is a great way for developers to demonstrate their proficiency in using AWS services to develop scalable, efficient, and secure cloud-based applications.

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The Amazon DVA-C01 certification exam is designed for individuals who want to validate their skills and knowledge in developing and maintaining applications on the AWS platform. This certification is ideal for developers who have experience with AWS services, and are looking to enhance their knowledge and take their career to the next level. The exam focuses on various aspects of application development, such as security, deployment, and troubleshooting, and requires candidates to demonstrate their proficiency in using AWS services to develop and maintain applications.

Amazon AWS Certified Developer Associate Exam Sample Questions (Q513-Q518):

NEW QUESTION # 513
A static website is hosted in an Amazon S3 bucket. Several HTML pages on the site use JavaScript to download images from another Amazon S3 bucket. These images are not displayed when users browse the site.
What is the possible cause for the issue?

A. The images must be stored in the same Amazon S3 bucket.
B. Port 80 must be opened on the security group in which the Amazon S3 bucket is located.
C. Cross Origin Resource Sharing must be enabled on the Amazon S3 bucket.
D. The referenced Amazon S3 bucket is in another region.

Answer: C

NEW QUESTION # 514
A company is developing a serverless ecommerce web application The application needs to make coordinated, all-or-nothing changes to multiple items in the company's inventory table in Amazon DynamoDB.
Which solution will meet these requirements?

A. Set up a FIFO queue using Amazon SQS. Group the changes in the queue. Update the table based on the grouped changes
B. Use the TransactWriteitem operation to group the changes Update the items in the table
C. Create a transaction table in an Amazon Aurora DB cluster to manage the transactions Write a backend process to sync the Aurora DB table and the DynamoDB table
D. Enable transactions for the DynamoDB table Use the BatchWriteltem operation to update the items.

Answer: B

Explanation:
Reference:
TransactWriteItems is a synchronous write operation that groups up to 25 action requests. The BatchWriteItem operation puts or deletes multiple items in one or more tables. https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/DynamoDB.html

NEW QUESTION # 515
An Amazon RDS database instance is used by many applications to look up historical dat
a. The query rate is relatively constant. When the historical data is updated each day, the resulting write traffic slows the read query performance and affects all application users.
What can be done to eliminate the performance impact on application users?

A. Create an RDS Read Replica and direct all read traffic to the replica.
B. Use Amazon DynamoDB instead of Amazon RDS to buffer the read traffic.
C. Implement Amazon ElastiCache in front of Amazon RDS to buffer the write traffic.
D. Make sure Amazon RDS is Multi-AZ so it can better absorb increased traffic.

Answer: A

Explanation:
https://aws.amazon.com/rds/details/read-replicas/

NEW QUESTION # 516
A company is creating a REST service using an Amazon API Gateway with AWS Lambda integration. The service must run different versions for testing purposes.
What would be the BEST way to accomplish this?

A. Deploy the API versions as unique stages with unique endpoints and use stage variables to provide further context
B. Use an X-Version header to denote which version is being called and pass that header to the Lambda function(s)
C. Create an API Gateway resource policy to isolate versions and provide context to the Lambda function(s)
D. Create an API Gateway Lambda authorizer to route API clients to the correct API version

Answer: B

Explanation:
The service run different versions for testing purposes. means different stages, stage variable is the way to go.

NEW QUESTION # 517
A Developer is creating a Lambda function and will be using external libraries that are not included in the standard Lambda libraries.
What action would minimize the Lambda compute time consumed?

A. Install the external libraries in Lambda to be available to all Lambda functions.
B. Create a Lambda deployment package that includes the external libraries.
C. Copy the external libraries to Amazon S3, and reference the external libraries to the S3 location.
D. Install the dependencies and external libraries at the beginning of the Lambda function.

Answer: A

NEW QUESTION # 518
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