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The AWS Certified Developer Associate certification provides a solid foundation for those interested in going further with AWS, such as pursuing the AWS Certified Solutions Architect or AWS Certified DevOps Engineer certifications. Moreover, certified individuals can expect to get better-paying job opportunities, work more efficiently, and deliver better-quality AWS-based applications.

Amazon DVA-C01: AWS Certified Developer Associate is a certification exam aimed at developers who want to demonstrate their skills and knowledge in developing secure and scalable cloud applications on the Amazon Web Services (AWS) platform. The exam tests the candidate's proficiency in AWS services, development and deployment of applications, and troubleshooting.

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Amazon AWS Certified Developer Associate Exam Sample Questions (Q307-Q312):

NEW QUESTION # 307
A company has an application that is based on Amazon EC2 The company provides API access to the application through Amazon API Gateway and uses Amazon DynamoDB to store the application's data A developer is investigating performance issues that are affecting the application. During peak usage, the application is overwhelmed by a large number of identical data read requests that come through APIs What is the MOST operationally efficient way for the developer to improve the application's performance''

A. Enable API Gateway caching to cache API responsesB. Use Amazon ElastiCache to cache application responses.C. Configure Amazon EC2 Auto Scaling policies to meet fluctuating demandD. Use DynamoDB Accelerator (DAX) to cache database responses

Answer: B


NEW QUESTION # 308
A website's page load times are gradually increasing as more users access the system at the same time. Analysis indicates that a user profile is being loaded from a database in all the web pages being visited by each user and this is increasing the database load and the page load latency. To address this issue the Developer decides to cache the user profile data.
Which caching strategy will address this situation MOST efficiently?

A. Create an Amazon ElastiCache cluster to cache the user profile data. Use a cache-aside caching strategy.B. Create a new Amazon EC2 Instance and run a NoSQL database on it. Cache the profile data within this database using the write-through caching strategy.C. Use a dedicated Amazon RDS instance for caching profile data. Use a write-through caching strategy.D. Create an ElastiCache cluster to cache the user profile data. Use a write-through caching strategy.

Answer: A

Explanation:
https://docs.aws.amazon.com/AmazonElastiCache/latest/mem-ug/Strategies.html


NEW QUESTION # 309
A Developer is testing a Docker-based application that uses the AWS SDK to interact with Amazon
DynamoDB. In the local development environment, the application has used IAM access keys. The application is now ready for deployment onto an ECS cluster.
How should the application authenticate with AWS services in production?

A. Refactor the application to call AWS STS AssumeRole based on an instance roleB. Configure an ECS task IAM role for the application to useC. Configure AWS access key/secret access key environment variables with new credentialsD. Configure the credentials file with a new access key/secret access key

Answer: B

Explanation:
https://docs.aws.amazon.com/AmazonECS/latest/developerguide/task_IAM_role.html#:~:targetText=Amazon%20ECS%20Task%20Role,Task%20Role%20trust%20relationship%20policy.


NEW QUESTION # 310
A Developer is writing a REST service that will add items to a shopping list. The service is built on Amazon API Gateway with AWS Lambda integrations. The shopping list items are send as query string parameters in the method request.
How should the Developer convert the query string parameters to arguments for the Lambda function?

A. Create a mapping templateB. Include the Amazon Resource Name (ARN) of the Lambda functionC. Enable request validationD. Change the integration type

Answer: D

Explanation:
Explanation
https://docs.aws.amazon.com/apigateway/latest/developerguide/api-gateway-api-integration-types.html


NEW QUESTION # 311
The Lambda function below is being called through an API using Amazon API Gateway. The average execution time for the Lambda function is about 1 second. The pseudocode for the Lambda function is as shown in the exhibit.

What two actions can be taken to improve the performance of this Lambda function without increasing the cost of the solution? (Select two.)

A. Implement custom database connection pooling with the Lambda functionB. Implement local caching of Amazon RDS data so Lambda can re-use the cacheC. Package only the modules the Lambda function requiresD. Move the initialization of the variable Amazon RDS connection outside of the handler functionE. Use Amazon DynamoDB instead of Amazon RDS

Answer: C,D


NEW QUESTION # 312
......

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