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Amazon DVA-C02 (AWS Certified Developer - Associate) exam is a comprehensive certification that validates the skills and knowledge of developers in designing and deploying scalable, highly available, and fault-tolerant applications on AWS. DVA-C02 exam is intended for individuals who have experience in programming and working with AWS services, and it covers a wide range of topics such as AWS core services, security, and architecture best practices.

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Amazon DVA-C02 Exam covers a wide range of topics, including AWS core services such as EC2, S3, and RDS, as well as developer-focused services such as AWS Lambda, AWS Elastic Beanstalk, and AWS CloudFormation. Candidates are also tested on their knowledge of programming languages such as Java, Python, and JavaScript, as well as modern application development practices such as DevOps, continuous integration and delivery, and serverless architecture.

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Amazon AWS Certified Developer - Associate Sample Questions (Q302-Q307):

NEW QUESTION # 302
A developer manages three AWS accounts. Each account contains an Amazon RDS DB instance in a private subnet. The developer needs to define users in each database in a consistent way.
The developer must ensure that the same users are created and updated later in all three accounts.
Which solution will meet these requirements with the MOST operational efficiency?

A. Write a script that creates the users. Deploy an Amazon EC2 instance in each account to run the script on the databases. Run the script in each account.
B. Create an AWS CloudFormation template. Declare the users in the template. Attach the users to the database. Deploy the template in each account.
C. Create an AWS CloudFormation template that contains a custom resource to create the users in the database. Deploy the template in each account.
D. Implement an AWS Lambda function that creates the users in the database. Provide the function with the details of all three accounts.

Answer: C

NEW QUESTION # 303
An application is processing clickstream data using Amazon Kinesis. The clickstream data feed into Kinesis experiences periodic spikes. The PutRecords API call occasionally fails and the logs show that the failed call returns the response shown below:

Which techniques will help mitigate this exception? (Choose two.)

A. Reduce the number of KCL consumers.
B. Implement retries with exponential backoff.
C. Use Amazon SNS instead of Kinesis.
D. Reduce the frequency and/or size of the requests.
E. Use a PutRecord API instead of PutRecords.

Answer: B,D

Explanation:
The response from the API call indicates that the ProvisionedThroughputExceededException exception has occurred. This exception means that the rate of incoming requests exceeds the throughput limit for one or more shards in a stream. To mitigate this exception, the developer can use one or more of the following techniques:
* Implement retries with exponential backoff. This will introduce randomness in the retry intervals and avoid overwhelming the shards with retries.
* Reduce the frequency and/or size of the requests. This will reduce the load on the shards and avoid throttling errors.
* Increase the number of shards in the stream. This will increase the throughput capacity of the stream and accommodate higher request rates.
* Use a PutRecord API instead of PutRecords. This will reduce the number of records per request and avoid exceeding the payload limit.
References:
* [ProvisionedThroughputExceededException - Amazon Kinesis Data Streams Service API Reference]
* [Best Practices for Handling Kinesis Data Streams Errors]

NEW QUESTION # 304
A developer is creating an AWS CloudFormation template to deploy Amazon EC2 instances across multiple AWS accounts. The developer must choose the EC2 instances from a list of approved instance types.
How can the developer incorporate the list of approved instance types in the CloudFormation template?

A. In the CloudFormation template, create a separate parameter for each EC2 instance type in the list.
B. In the CloudFormation template, create a parameter with the list of EC2 instance types as AllowedValues.
C. In the Resources section of the CloudFormation template, create resources for each EC2 instance type in the list.
D. Create a separate CloudFormation template for each EC2 instance type in the list.

Answer: B

Explanation:
In the CloudFormation template, the developer should create a parameter with the list of approved EC2 instance types as AllowedValues. This way, users can select the instance type they want to use when launching the CloudFormation stack, but only from the approved list.

NEW QUESTION # 305
An application is processing clickstream data using Amazon Kinesis. The clickstream data feed into Kinesis experiences periodic spikes. The PutRecords API call occasionally fails and the logs show that the failed call returns the response shown below:

Which techniques will help mitigate this exception? (Choose two.)

A. Reduce the number of KCL consumers.
B. Implement retries with exponential backoff.
C. Use Amazon SNS instead of Kinesis.
D. Reduce the frequency and/or size of the requests.
E. Use a PutRecord API instead of PutRecords.

Answer: B,D

Explanation:
Explanation
The response from the API call indicates that the ProvisionedThroughputExceededException exception has occurred. This exception means that the rate of incoming requests exceeds the throughput limit for one or more shards in a stream. To mitigate this exception, the developer can use one or more of the following techniques:
Implement retries with exponential backoff. This will introduce randomness in the retry intervals and avoid overwhelming the shards with retries.
Reduce the frequency and/or size of the requests. This will reduce the load on the shards and avoid throttling errors.
Increase the number of shards in the stream. This will increase the throughput capacity of the stream and accommodate higher request rates.
Use a PutRecord API instead of PutRecords. This will reduce the number of records per request and avoid exceeding the payload limit.
References:
[ProvisionedThroughputExceededException - Amazon Kinesis Data Streams Service API Reference]
[Best Practices for Handling Kinesis Data Streams Errors]

NEW QUESTION # 306
A developer is modifying an existing AWS Lambda function. While checking the code, the developer notices hardcoded parameter values for an Amazon RDS for SQL Server user name, password, database, host, and port. There are also hardcoded parameter values for an Amazon DynamoDB table, an Amazon S3 bucket, and an Amazon Simple Notification Service (Amazon SNS) topic.
The developer wants to securely store the parameter values outside the code in an encrypted format and wants to turn on rotation for the credentials. The developer also wants to be able to reuse the parameter values from other applications and to update the parameter values without modifying code.
Which solution will meet these requirements with the LEAST operational overhead?

A. Create RDS database parameters in AWS Systems Manager Parameter Store for the user name, password, database, host, and port. Create encrypted Lambda environment variables for the DynamoDB table, S3 bucket, and SNS topic. Create a Lambda function and set the logic for the credentials rotation task. Schedule the credentials rotation task in Amazon EventBridge.
B. Create an RDS database secret in AWS Secrets Manager. Set the user name, password, database, host, and port. Turn on secret rotation. Create encrypted Lambda environment variables for the DynamoDB table, S3 bucket, and SNS topic.
C. Create RDS database parameters in AWS Systems Manager Parameter Store for the user name, password, database, host, and port. Store the DynamoDB table, S3 bucket, and SNS topic in Amazon S3. Create a Lambda function and set the logic for the credentials rotation. Invoke the Lambda function on a schedule.
D. Create an RDS database secret in AWS Secrets Manager. Set the user name, password, database, host, and port. Turn on secret rotation. Create SecureString parameters in AWS Systems Manager Parameter Store for the DynamoDB table, S3 bucket, and SNS topic.

Answer: D

Explanation:
https://docs.aws.amazon.com/systems-manager/latest/userguide/integration-ps- secretsmanager.html

NEW QUESTION # 307
......

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