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Amazon AWS Certified Developer - Associate Sample Questions (Q21-Q26):

NEW QUESTION # 21
A developer is creating a serverless application that uses an AWS Lambda function The developer will use AWS CloudFormation to deploy the application The application will write logs to Amazon CloudWatch Logs The developer has created a log group in a CloudFormation template for the application to use The developer needs to modify the CloudFormation template to make the name of the log group available to the application at runtime Which solution will meet this requirement?

A. Use the AWS:lnclude transform in CloudFormation to provide the log group's name to the application
B. Use the CloudFormation template's Mappings section to specify the log group's name for the application.
C. Pass the log group's name to the application in the user data section of the CloudFormation template.
D. Pass the log group's Amazon Resource Name (ARN) as an environment variable to the Lambda function

Answer: D

Explanation:
CloudFormation and Lambda Environment Variables:
CloudFormation is an excellent tool to manage infrastructure as code, including the log group resource.
Lambda functions can access environment variables at runtime, making them a suitable way to pass configuration information like the log group ARN.
CloudFormation Template Modification:
In your CloudFormation template, define the log group resource.
In the Lambda function resource, add an Environment section:
YAML
Environment:
Variables:
LOG_GROUP_ARN: !Ref LogGroupResourceName
Use code with caution.
content_copy
The !Ref intrinsic function retrieves the log group's ARN, which CloudFormation generates during stack creation.
Using the ARN in Your Lambda Function:
Within your Lambda code, access the LOG_GROUP_ARN environment variable.
Configure your logging library (e.g., Python's logging module) to send logs to the specified log group.
Reference:
AWS Lambda Environment Variables: https://docs.aws.amazon.com/lambda/latest/dg/configuration-envvars.html CloudFormation !Ref Intrinsic Function: https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/intrinsic-function-reference-ref.html

NEW QUESTION # 22
A developer is creating an application that will store personal health information (PHI). The PHI needs to be encrypted at all times. An encrypted Amazon RDS for MySQL DB instance is storing the dat a. The developer wants to increase the performance of the application by caching frequently accessed data while adding the ability to sort or rank the cached datasets.
Which solution will meet these requirements?

A. Create an Amazon ElastiCache for Memcached instance. Enable encryption of data in transit and at rest. Store frequently accessed data in the cache.
B. Create an Amazon ElastiCache for Redis instance. Enable encryption of data in transit and at rest. Store frequently accessed data in the cache.
C. Create an Amazon RDS for MySQL read replica. Connect to the read replica by using SSL. Configure the read replica to store frequently accessed data.
D. Create an Amazon DynamoDB table and a DynamoDB Accelerator (DAX) cluster for the table. Store frequently accessed data in the DynamoDB table.

Answer: B

NEW QUESTION # 23
A company hosts a client-side web application for one of its subsidiaries on Amazon S3. The web application can be accessed through Amazon CloudFront from https://www.example.com. After a successful rollout, the company wants to host three more client-side web applications for its remaining subsidiaries on three separate S3 buckets.
To achieve this goal, a developer moves all the common JavaScript files and web fonts to a central S3 bucket that serves the web applications. However, during testing, the developer notices that the browser blocks the JavaScript files and web fonts.
What should the developer do to prevent the browser from blocking the JavaScript files and web fonts?

A. Create a Content-MD5 header that provides a message integrity check for the central S3 bucket. Insert the Content-MD5 header for each web application request.
B. Create a bucket policy that allows access to the central S3 bucket. Attach the bucket policy to the central S3 bucket.
C. Create a cross-origin resource sharing (CORS) configuration that allows access to the central S3 bucket. Add the CORS configuration to the central S3 bucket.
D. Create four access points that allow access to the central S3 bucket. Assign an access point to each web application bucket.

Answer: C

Explanation:
Explanation
This is a frequent trouble. Web applications cannot access the resources in other domains by default, except some exceptions. You must configure CORS on the resources to be accessed.
https://docs.aws.amazon.com/AmazonS3/latest/userguide/cors.html

NEW QUESTION # 24
A company is using Amazon API Gateway to invoke a new AWS Lambda function The company has Lambda function versions in its PROD and DEV environments. In each environment, there is a Lambda function alias pointing to the corresponding Lambda function version API Gateway has one stage that is configured to point at the PROD alias The company wants to configure API Gateway to enable the PROD and DEV Lambda function versions to be simultaneously and distinctly available Which solution will meet these requirements?

A. Use an environment variable for the Lambda function alias in API Gateway. Republish PROD and create a new stage for development. Create API gateway environment variables for PROD and DEV stages. Point each stage variable to the PROD Lambda function alias to the DEV Lambda function alias.
B. Enable a Lambda authorizer for the Lambda function alias in API Gateway Republish PROD and create a new stage for DEV Create API Gateway stage variables for the PROD and DEV stages. Point each stage variable to the PROD Lambda authorizer to the DEV Lambda authorizer.
C. Use an API Gateway stage variable to configure the Lambda function alias Republish PROD and create a new stage for development Create API Gateway stage variables for PROD and DEV stages Point each stage variable to the PROD Lambda function alias and to the DEV Lambda function alias
D. Set up a gateway response in API Gateway for the Lambda function alias. Republish PROD and create a new stage for DEV. Create gateway responses in API Gateway for PROD and DEV Lambda aliases

Answer: C

Explanation:
Explanation
The best solution is to use an API Gateway stage variable to configure the Lambda function alias. This allows you to specify the Lambda function name and its alias or version using the syntax function_name:${stageVariables.variable_name} in the Integration Request. You can then create different stages in API Gateway, such as PROD and DEV, and assign different values to the stage variable for each stage. This way, you can invoke different Lambda function versions or aliases based on the stage that you are using, without changing the function name in the Integration Request. References
* Using API Gateway stage variables to manage Lambda functions
* How to point AWS API gateway stage to specific lambda function alias?
* Setting stage variables using the Amazon API Gateway console
* Amazon API Gateway stage variables reference

NEW QUESTION # 25
A developer is building an application that processes a stream of user-supplied data. The data stream must be consumed by multiple Amazon EC2 based processing applications in parallel and in real time. Each processor must be able to resume without losing data if there is a service interruption. The application architect plans to add other processors in the near future, and wants to minimize the amount of data duplication involved.
Which solution will satisfy these requirements?

A. Publish the data to Amazon Data Firehose.
B. Publish the data to Amazon EventBridge.
C. Publish the data to Amazon Simple Queue Service (Amazon SQS).
D. Publish the data to Amazon Kinesis Data Streams.

Answer: D

NEW QUESTION # 26
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