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The DVA-C02 Exam is a challenging and rewarding certification that can help developers advance their careers in the cloud computing industry. By passing the exam, developers can demonstrate their proficiency in designing, building, and deploying cloud-based applications on AWS, which is a highly sought-after skill in today's job market.

The AWS Certified Developer - Associate exam covers a range of topics, including AWS core services, security, identity and access management, databases, and storage. Candidates are required to demonstrate proficiency in developing, deploying, and debugging cloud-based applications using AWS services like AWS Lambda, Amazon S3, Amazon DynamoDB, and Amazon EC2.

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Amazon AWS Certified Developer - Associate Sample Questions (Q99-Q104):

NEW QUESTION # 99
A developer is creating a service that uses an Amazon S3 bucket for image uploads. The service will use an AWS Lambda function to create a thumbnail of each image Each time an image is uploaded the service needs to send an email notification and create the thumbnail The developer needs to configure the image processing and email notifications setup.
Which solution will meet these requirements?

Answer: A

Explanation:
Explanation
This solution will allow the developer to receive notifications for each image uploaded to the S3 bucket, and also create a thumbnail using the Lambda function. The SNS topic will serve as a trigger for both the Lambda function and the email notification subscription. When an image is uploaded, S3 will send a notification to the SNS topic, which will trigger the Lambda function to create the thumbnail and also send an email notification to the specified email address.


NEW QUESTION # 100
A developer is writing an AWS Lambda function. The developer wants to log key events that occur while the Lambda function runs. The developer wants to include a unique identifier to associate the events with a specific function invocation. The developer adds the following code to the Lambda function:

Which solution will meet this requirement?

Answer: C

Explanation:
https://docs.aws.amazon.com/lambda/latest/dg/nodejs-context.htmlhttps://docs.aws.amazon.com/lambda/latest
/dg/nodejs-logging.html
There is no explicit information for the runtime, the code is written in Node.js.
AWS Lambda is a service that lets developers run code without provisioning or managing servers. The developer can use the AWS request ID field in the context object to obtain a unique identifier for each function invocation. The developer can configure the application to write logs to standard output, which will be captured by Amazon CloudWatch Logs. This solution will meet the requirement of logging key events with a unique identifier.


NEW QUESTION # 101
A company wants to use AWS AppConfig to gradually deploy a new feature to 15% of users to test the feature before a full deployment.
Which solution will meet this requirement with the LEAST operational overhead?

Answer: A

Explanation:
Comprehensive Detailed and Lengthy Step-by-Step Explanation with All AWS Developer Reference:
1. Understanding the Use Case:
The company wants to gradually release a new feature to 15% of users to perform testing. AWS AppConfig is designed to manage and deploy configurations, including feature flags, allowing controlled rollouts.
2. Key AWS AppConfig Features:
Feature Flags: Enable or disable features dynamically without redeploying code.
Variants: Define different configurations for subsets of users.
Targeting Rules: Specify rules for which users receive a particular variant.
3. Explanation of the Options:
Option A:
"Set up a custom script within the application to randomly select 15% of users. Assign a flag for the new feature to the selected users." While possible, this approach requires significant operational effort to manage user selection and ensure randomness. It does not leverage AWS AppConfig's built-in capabilities, which increases overhead.
Option B:
"Create separate AWS AppConfig feature flags for both groups of users. Configure the flags to target 15% of users." Creating multiple feature flags for different user groups complicates configuration management and does not optimize the use of AWS AppConfig.
Option C:
"Create an AWS AppConfig feature flag. Define a variant for the new feature, and create a rule to target 15% of users." This is the correct solution. Using AWS AppConfig feature flags with variants and targeting rules is the most efficient approach. It minimizes operational overhead by leveraging AWS AppConfig's built-in targeting and rollout capabilities.
Option D:
"Use AWS AppConfig to create a feature flag without variants. Implement a custom traffic splitting mechanism in the application code." This approach requires custom implementation within the application code, increasing complexity and operational effort.
4. Implementation Steps for Option C:
Set Up AWS AppConfig:
Open the AWS Systems Manager Console.
Navigate to AppConfig.
Create a Feature Flag:
Define a new configuration for the feature flag.
Add variants (e.g., "enabled" for the new feature and "disabled" for no change).
Define a Targeting Rule:
Use percentage-based targeting to define a rule that applies the "enabled" variant to 15% of users.
Targeting rules can use attributes like user IDs or geographic locations.
Deploy the Configuration:
Deploy the configuration using a controlled rollout to ensure gradual exposure.
Reference:
AWS AppConfig Documentation
Feature Flags in AWS AppConfig
AWS AppConfig Targeting Rules


NEW QUESTION # 102
A developer is trying to get data from an Amazon DynamoDB table called demoman-table. The developer configured the AWS CLI to use a specific IAM user's credentials and ran the following command:
aws dynamodb get-item --table-name demoman-table --key '{"id": {"N":"1993"}}' The command returned errors and no rows were returned.
What is the MOST likely cause of these issues?

Answer: A

Explanation:
The command is correct and the demoman table exists. The most likely issue is that the IAM user does not have a policy associated with read access to the demoman table.
To resolve the issue, the developer must add a policy to the IAM user that grants read access to the demoman table.


NEW QUESTION # 103
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: D

Explanation:
Comprehensive Detailed Explanation with all AWS References
* Why Option A is Correct:
* The ArnLike condition with the specific ARN for myStateMachine ensures that only this state machine can assume the role. The format urn:aws:states is correct for specifying Step Functions resources.
* Why Other Options are Incorrect:
* Option B: Wildcards (*) in the ARN allow more resources to assume the role, which violates the requirement.
* Option C: This condition restricts the account but not the specific state machine.
* Option D: A StringNotEquals condition is used to deny specific values, which does not ensure exclusivity for the desired state machine.
* AWS Documentation References:
* IAM Trust Policies for Step Functions


NEW QUESTION # 104
......

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