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Amazon AWS Certified Developer - Associate Sample Questions (Q79-Q84):

NEW QUESTION # 79
A company developed an API application on AWS by using Amazon CloudFront. Amazon API Gateway, and AWS Lambda. The API has a minimum of four requests every second A developer notices that many API users run the same query by using the POST method. The developer wants to cache the POST request to optimize the API resources.
Which solution will meet these requirements'?

A. Save the latest request m AWS Systems Manager Parameter Store Modify the Lambda function to take the latest request response from Parameter Store
B. Override the cache method in me selected stage of API Gateway Select the POST method.
C. Configure the CloudFront cache Update the application to return cached content based upon the default request headers.
D. Save the latest request response in Lambda /tmp directory Update the Lambda function to check the
/tmp directory

Answer: C

Explanation:
This solution will meet the requirements by using Amazon CloudFront, which is a content delivery network (CDN) service that speeds up the delivery of web content and APIs to end users. The developer can configure the CloudFront cache, which is a set of edge locations that store copies of popular or recently accessed content close to the viewers. The developer can also update the application to return cached content based upon the default request headers, which are a set of HTTP headers that CloudFront automatically forwards to the origin server and uses to determine whether an object in an edge location is still valid. By caching the POST requests, the developer can optimize the API resources and reduce the latency for repeated queries.
Option B is not optimal because it will override the cache method in the selected stage of API Gateway, which is not possible or effective as API Gateway does not support caching for POST methods by default.
Option C is not optimal because it will save the latest request response in Lambda /tmp directory, which is a local storage space that is available for each Lambda function invocation, not a cache that can be shared across multiple invocations or requests. Option D is not optimal because it will save the latest request in AWS Systems Manager Parameter Store, which is a service that provides secure and scalable storage for configuration data and secrets, not a cache for API responses.
References: [Amazon CloudFront], [Caching Content Based on Request Headers]

NEW QUESTION # 80
A development team is designing a mobile app that requires multi-factor authentication.
Which steps should be taken to achieve this? (Choose two.)

A. Use Amazon Cognito to create a user pool and create users in the user pool.
B. Enable multifactor authentication for the users created in AWS IAM.
C. Use AWS IAM to create IAM users.
D. Send multi-factor authentication text codes to users with the Amazon SNS Publish API call in the app code.
E. Enable multi-factor authentication for the Amazon Cognito user pool.

Answer: A,E

NEW QUESTION # 81
A company has an existing application that has hardcoded database credentials A developer needs to modify the existing application The application is deployed in two AWS Regions with an active-passive failover configuration to meet company's disaster recovery strategy The developer needs a solution to store the credentials outside the code. The solution must comply With the company's disaster recovery strategy Which solution Will meet these requirements in the MOST secure way?

A. Store credentials in AWS Systems Manager Parameter Store in the primary Region. Enable parameter replication to the secondary Region. Update the application to use the Amazon Resource Name (ARN) based on the Region.
B. Store credentials in a config file. Upload the config file to an Amazon Elastic File System (Amazon EFS) file system. Update the application to use the Amazon EFS file system Regional endpoints to access the config file in the primary and secondary Regions.
C. Store credentials in a config file. Upload the config file to an S3 bucket in me primary Region. Enable Cross-Region Replication (CRR) to an S3 bucket in the secondary region. Update the application to access the config file from the S3 bucket based on the Region.
D. Store the credentials in AWS Secrets Manager in the primary Region. Enable secret replication to the secondary Region Update the application to use the Amazon Resource Name (ARN) based on the Region.

Answer: D

Explanation:
AWS Secrets Manager is a service that allows you to store and manage secrets, such as database credentials, API keys, and passwords, in a secure and centralized way. It also provides features such as automatic secret rotation, auditing, and monitoring1. By using AWS Secrets Manager, you can avoid hardcoding credentials in your code, which is a bad security practice and makes it difficult to update them. You can also replicate your secrets to another Region, which is useful for disaster recovery purposes2. To access your secrets from your application, you can use the ARN of the secret, which is a unique identifier that includes the Region name. This way, your application can use the appropriate secret based on the Region where it is deployed3.
References:
* AWS Secrets Manager
* Replicating and sharing secrets
* Using your own encryption keys

NEW QUESTION # 82
A company is building a new application that runs on AWS and uses Amazon API Gateway to expose APIs. Teams of developers are working on separate components of the application in parallel. The company wants to publish an API without an integrated backend so that teams that depend on the application backend can continue the development work before the API backend development is complete.
Which solution will meet these requirements?

A. Create an AWS Lambda function that returns mocked responses and various HTTP status codes.
Create API Gateway resources and set the integration type value to AWS_PROXY. Deploy the API.
B. Create an EC2 application that returns mocked HTTP responses. Create API Gateway resources and set the integration type value to AWS. Create an API Gateway stage and deploy the API.
C. Create API Gateway resources and set the integration type value to MOCK. Configure the method integration request and integration response to associate a response with an HTTP status code. Create an API Gateway stage and deploy the API.
D. Create API Gateway resources and set the integration type value set to HTTP_PROXY. Add mapping templates and deploy the API. Create an AWS Lambda layer that returns various HTTP status codes. Associate the Lambda layer with the API deployment.

Answer: C

NEW QUESTION # 83
A gaming company has deployed a web portal on AWS Elastic Beanstalk. The company sometimes needs to deploy new versions three or four times in a day. The company needs to deploy new features for all users as quickly as possible. The solution must minimize performance impact and must maximize availability.
What solution will meet these requirements?

A. Use an all-at-once deployment policy to deploy to Amazon EC2 instances.
B. Use a-canary deployment strategy to deploy changes to Amazon EC2 instances.
C. Use an immutable deployment policy to deploy to Amazon EC2 instances.
D. Use a rolling deployment policy to deploy to Amazon EC2 instances.

Answer: B

NEW QUESTION # 84
......

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