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Free PDF Amazon - DVA-C02 - Accurate AWS Certified Developer - Associate New APP Simulations

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Amazon DVA-C02: AWS Certified Developer - Associate is a certification exam offered by Amazon Web Services (AWS) for individuals who want to demonstrate their skills and knowledge in developing and maintaining applications on the AWS platform. DVA-C02 Exam is designed to validate an individual's ability to design, develop, and deploy cloud-based applications using AWS services and best practices.

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Amazon AWS Certified Developer - Associate Sample Questions (Q130-Q135):

NEW QUESTION # 130
A developer is working on an ecommerce website The developer wants to review server logs without logging in to each of the application servers individually. The website runs on multiple Amazon EC2 instances, is written in Python, and needs to be highly available How can the developer update the application to meet these requirements with MINIMUM changes?

A. Rewrite the application to be cloud native and to run on AWS Lambda, where the logs can be reviewed in Amazon CloudWatch
B. Scale down the application to one larger EC2 instance where only one instance is recording logs
C. Install the unified Amazon CloudWatch agent on the EC2 instances Configure the agent to push the application logs to CloudWatch
D. Set up centralized logging by using Amazon OpenSearch Service, Logstash, and OpenSearch Dashboards

Answer: C

Explanation:
* Centralized Logging Benefits:Centralized logging is essential for operational visibility in scalable systems, especially those using multiple EC2 instances like our e-commerce website. CloudWatch provides this capability, along with other monitoring features.
* CloudWatch Agent:This is the best way to send custom application logs from EC2 instances to CloudWatch. Here's the process:
* Install the CloudWatch agent on each EC2 instance.
* Configure the agent with a configuration file, specifying:
* Which log files to collect.
* The format in which to send logs to CloudWatch (e.g., JSON).
* The specific CloudWatch Logs log group and log stream for these logs.
* Viewing and Analyzing Logs:Once the agent is pushing logs, use the CloudWatch Logs console or API:
* View and search the logs across all instances.
* Set up alarms based on log events.
* Use CloudWatch Logs Insights for sophisticated queries and analysis.

NEW QUESTION # 131
A company has a mobile app. The app includes an Amazon API Gateway REST API that invokes AWS Lambda functions. The Lambda functions process data from the app.
The company needs to test updated Lambda functions that have new features. The company must conduct these tests with a subset of users before deployment. The tests must not affect other users of the app.
Which solution will meet these requirements with the LEAST amount of operational effort?

A. Create a new version of each Lambda function with a weighted alias. Configure a weight value for each version of the Lambda function. Update the new weighted alias Amazon Resource Name (ARN) in the REST API.
B. Create a new REST API in API Gateway. Set up a Lambda non-proxy integration to connect to multiple Lambda functions. Specify the necessary parameters and properties in API Gateway.Enable canary settings on the deployment stage. Specify a smaller percentage of API traffic to go to the new version of the Lambda function.
C. Create a new version of each Lambda function. Integrate a predefined canary deployment in AWS CodeDeploy to slowly shift the traffic to the new versions automatically.
D. Create a new REST API in API Gateway. Set up a Lambda proxy integration to connect to multiple Lambda functions. Enable canary settings on the deployment stage. Specify a smaller percentage of API traffic to go to the new version of the Lambda function.

Answer: C

NEW QUESTION # 132
When using the AWS Encryption SDK how does the developer keep track of the data encryption keys used to encrypt data?

A. The data encryption key is stored m the user data for the EC2 instance.
B. The SDK stores the data encryption keys automaticity in Amazon S3.
C. The developer must manually keep Hack of the data encryption keys used for each data object.
D. The SDK encrypts the data encryption key and stores it (encrypted) as part of the resumed ophertext.

Answer: D

Explanation:
Explanation
This solution will meet the requirements by using AWS Encryption SDK, which is a client-side encryption library that enables developers to encrypt and decrypt data using data encryption keys that are protected by AWS Key Management Service (AWS KMS). The SDK encrypts the data encryption key with a customer master key (CMK) that is managed by AWS KMS, and stores it (encrypted) as part of the returned ciphertext.
The developer does not need to keep track of the data encryption keys used to encrypt data, as they are stored with the encrypted data and can be retrieved and decrypted by using AWS KMS when needed. Option A is not optimal because it will require manual tracking of the data encryption keys used for each data object, which is error-prone and inefficient. Option C is not optimal because it will store the data encryption keys automatically in Amazon S3, which is unnecessary and insecure as Amazon S3 is not designed for storing encryption keys.
Option D is not optimal because it will store the data encryption key in the user data for the EC2 instance, which is also unnecessary and insecure as user data is not encrypted by default.
References: [AWS Encryption SDK], [AWS Key Management Service]

NEW QUESTION # 133
A developer is adding an Amazon SNS topic to an application. The topic has multiple subscribers, an Amazon SQS queue subscription named sqs-sub, and an email subscription named email- sub.
The developer wants the application to send all notifications to email-sub. Only messages that have an attribute of department with a value of finance must go to sqs-sub. Currently, neither subscription has a subscription filter policy.
Which solution will meet these requirements?

A. Create a subscription filter policy on email-sub that contains '*': ['*'].
B. Create a subscription filter policy on sqs-sub that contains 'department': ['finance'].
C. Create a subscription filter policy on email-sub that contains 'department': ['*']. Create a second subscription filter policy on sqs-sub that contains 'department': ['finance'].
D. Create a subscription filter policy on email-sub that contains 'department': ['finance']. Create a second subscription filter policy on sqs-sub that contains 'department': ['*'].

Answer: B

Explanation:
To send all notifications to email-sub, leave its filter policy unset (or set to match all messages by default). To ensure only messages with department = finance go to sqs-sub, apply a filter policy on sqs-sub with 'department': ['finance']. This configuration meets the requirements with the least configuration and no unnecessary filters.

NEW QUESTION # 134
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. 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
B. 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.
C. 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.
D. 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

Answer: B

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 # 135
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