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To earn the AWS Certified Developer - Associate certification, candidates must pass the DVA-C02 Exam. DVA-C02 exam consists of multiple-choice and multiple-response questions that cover various topics, such as AWS core services, AWS databases, AWS security, AWS deployment, and AWS troubleshooting. DVA-C02 exam duration is 130 minutes, and the passing score is 720 out of 1000.

To prepare for the DVA-C02 exam, candidates should have hands-on experience working with AWS services and should be familiar with AWS best practices. They should also have a good understanding of programming languages such as Java, Python, and Ruby, as well as database technologies such as MySQL and Oracle. Candidates can prepare for the exam by taking online courses, attending AWS training sessions, and practicing with sample questions and scenarios.

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Amazon AWS Certified Developer - Associate Sample Questions (Q762-Q767):

NEW QUESTION # 762
A developer has observed an increase in bugs in the AWS Lambda functions that a development team has deployed in its Node is application. To minimize these bugs, the developer wants to impendent automated testing of Lambda functions in an environment that Closely simulates the Lambda environment.
The developer needs to give other developers the ability to run the tests locally. The developer also needs to integrate the tests into the team's continuous integration and continuous delivery (Ct/CO) pipeline before the AWS Cloud Development Kit (AWS COK) deployment.
Which solution will meet these requirements?

A. Create sample events based on the Lambda documentation. Create a Docker container from the Node is base image to invoke the Lambda functions. Check the response Document how to run the Docker container for the more developers on the team update the CI/CD pipeline to run the Docker container.
B. Create sample events based on the Lambda documentation. Create automated test scripts that use the cdk local invoke command to invoke the Lambda functions. Check the response Document the test scripts for the other developers on the team Update the CI/CD pipeline to run the test scripts.
C. Install a unit testing framework that reproduces the Lambda execution environment. Create sample events based on the Lambda Documentation Invoke the handler function by using a unit testing framework. Check the response Document how to run the unit testing framework for the other developers on the team. Update the OCD pipeline to run the unit testing framework.
D. Install the AWS Serverless Application Model (AWS SAW) CLI tool Use the Sam local generate-event command to generate sample events for me automated tests. Create automated test scripts that use the Sam local invoke command to invoke the Lambda functions. Check the response Document the test scripts tor the other developers on the team Update the CI/CD pipeline to run the test scripts.

Answer: D

Explanation:
This solution will meet the requirements by using AWS SAM CLI tool, which is a command line tool that lets developers locally build, test, debug, and deploy serverless applications defined by AWS SAM templates. The developer can use sam local generate-event command to generate sample events for different event sources such as API Gateway or S3. The developer can create automated test scripts that use sam local invoke command to invoke Lambda functions locally in an environment that closely simulates Lambda environment.
The developer can check the response from Lambda functions and document how to run the test scripts for other developers on the team. The developer can also update CI/CD pipeline to run these test scripts before deploying with AWS CDK. Option A is not optimal because it will use cdk local invoke command, which does not exist in AWS CDK CLI tool. Option B is not optimal because it will use a unit testing framework that reproduces Lambda execution environment, which may not be accurate or consistent with Lambda environment. Option D is not optimal because it will create a Docker container from Node.js base image to invoke Lambda functions, which may introduce additional overhead and complexity for creating and running Docker containers.
References: [AWS Serverless Application Model (AWS SAM)], [AWS Cloud Development Kit (AWS CDK)]

NEW QUESTION # 763
A company has a web application that runs on Amazon EC2 instances with a custom Amazon Machine Image (AMI). The company uses AWS CloudFormation to provision the application. The application runs in the us-east-1 Region, and the company needs to deploy the application to the us-west-1 Region.
An attempt to create the AWS CloudFormation stack in us-west-1 fails. An error message states that the AMI ID does not exist. A developer must resolve this error with a solution that uses the least amount of operational overhead.
Which solution meets these requirements?

A. Copy the custom AMI from us-east-1 to us-west-1. Update the AWS CloudFormation template for us-west-1 to refer to AMI ID for the copied AMI. Relaunch the stack.
B. Manually deploy the application outside AWS CloudFormation in us-west-1.
C. Change the AWS CloudFormation templates for us-east-1 and us-west-1 to use an AWS AMI.
Relaunch the stack for both Regions.
D. Build the custom AMI in us-west-1. Create a new AWS CloudFormation template to launch the stack in us-west-1 with the new AMI ID.

Answer: A

Explanation:
This will allow the company to deploy the application to the us-west-1 Region using the same custom AMI that is used in the us-east-1 Region.

NEW QUESTION # 764
A company has a web application that is hosted on Amazon EC2 instances The EC2 instances are configured to stream logs to Amazon CloudWatch Logs The company needs to receive an Amazon Simple Notification Service (Amazon SNS) notification when the number of application error messages exceeds a defined threshold within a 5-minute period Which solution will meet these requirements?

A. Configure a subscription filter on the CloudWatch Logs log group. Configure the filter to send an SNS notification when the number of errors exceeds the defined threshold within a 5-minute period.
B. Install and configure the Amazon Inspector agent on the EC2 instances to monitor for errors Configure Amazon Inspector to send an SNS notification when the number of errors exceeds the defined threshold within a 5-minute period
C. Rewrite the application code to stream application logs to Amazon SNS Configure an SNS topic to send a notification when the number of errors exceeds the defined threshold within a 5-minute period
D. Create a CloudWatch metric filter to match the application error pattern in the log data. Set up a CloudWatch alarm based on the new custom metric. Configure the alarm to send an SNS notification when the number of errors exceeds the defined threshold within a 5-minute period.

Answer: D

Explanation:
CloudWatch for Log Analysis: CloudWatch is the best fit here because logs are already centralized. Here's the process:
Metric Filter: Create a metric filter on the CloudWatch Logs log group. Design a pattern to specifically identify application error messages.
Custom Metric: This filter generates a new custom CloudWatch metric (e.g., ApplicationErrors). This metric tracks the error count.
CloudWatch Alarm: Create an alarm on the ApplicationErrors metric. Configure the alarm with your desired threshold and a 5-minute evaluation period.
SNS Action: Set the alarm to trigger an SNS notification when it enters the alarm state.
Reference:
CloudWatch Metric Filters: https://docs.aws.amazon.com/AmazonCloudWatch/latest/logs/MonitoringLogData.html CloudWatch Alarms: https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/AlarmThatSendsEmail.html

NEW QUESTION # 765
A company has an online order website that uses Amazon DynamoDB to store item inventory. A sample of the inventory object is as follows:

A developer needs to reduce all inventory prices by 100 as long as the resulting price would not be less than 500.
What should the developer do to make this change with the LEAST number of calls to DynamoDB?

A. Perform a DynamoDB UpdateItem operation with a condition expression of "MIN Price = 500".
B. Perform a DynamoDB UpdateItem operation with a condition expression of "ProductCategory IN ({"S": "Sporting Goods")) and Price >= 600".
C. Perform a DynamoDB Query operation with the Id. If the price is >= 600, perform an UpdateItem operation to update the price.
D. Perform a DynamoDB UpdateItem operation with a condition expression of "Price >= 600".

Answer: D

Explanation:
To update the Price while ensuring it does not go below 500, the developer should perform a single UpdateItem operation with a ConditionExpression like Price >= 600. This ensures the update is performed only if the price remains ≥ 500 after subtracting 100, minimizing the number of calls by avoiding a prior read.

NEW QUESTION # 766
A developer is creating a stock trading application. The developer needs a solution to send text messages to application users to confirmation when a trade has been completed.
The solution must deliver messages in the order a user makes stock trades. The solution must not send duplicate messages.
Which solution will meet these requirements?

A. Configure the application to publish messages to an Amazon Data Firehose delivery stream. Configure the delivery stream to have a destination of each user's mobile phone number that is passed in the trade confirmation message.
B. Create an Amazon Simple Notification Service (SNS) FIFO topic. Configure the application to use the AWS SDK to publish notifications to the SNS topic to send SMS messages to the users.
C. Configure a pipe in Amazon EventBridge Pipes. Connect the application to the pipe as a source. Configure the pipe to use each user's mobile phone number as a target. Configure the pipe to send incoming events to the users.
D. Create an Amazon Simple Queue Service (Amazon SQS) FIFO queue. Use the SendMessageln API call to send the trade confirmation messages to the queue. Use the SendMessageOut API to send the messages to users by using the information provided in the trade confirmation message.

Answer: C

NEW QUESTION # 767
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