Amazon Web Services crack4sure dva-c02 Actual Questions by Francisco q65 vce pdf

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Exam Name:	AWS Certified Developer - Associate
Exam Code:	DVA-C02 Dumps
Vendor:	Amazon Web Services	Certification:	AWS Certified Associate
Questions:	600 Q&A's	Shared By:	francisco

Question 16

A mobile app stores blog posts in an Amazon DynacnoDB table Millions of posts are added every day and each post represents a single item in the table. The mobile app requires only recent posts. Any post that is older than 48 hours can be removed.

What is the MOST cost-effective way to delete posts that are older man 48 hours?

Options:

For each item add a new attribute of type String that has a timestamp that is set to the blog post creation time. Create a script to find old posts with a table scan and remove posts that are order than 48 hours by using the Balch Write ltem API operation. Schedule a cron job on an Amazon EC2 instance once an hour to start the script.

For each item add a new attribute of type. String that has a timestamp that its set to the blog post creation time. Create a script to find old posts with a table scan and remove posts that are Oder than 48 hours by using the Batch Write item API operating. Place the script in a container image. Schedule an Amazon Elastic Container Service (Amazon ECS) task on AWS Far gate that invokes the container every 5 minutes.

For each item, add a new attribute of type Date that has a timestamp that is set to 48 hours after the blog post creation time. Create a global secondary index (GSI) that uses the new attribute as a sort key. Create an AWS Lambda function that references the GSI and removes expired items by using the Batch Write item API operation Schedule me function with an Amazon CloudWatch event every minute.

For each item add a new attribute of type. Number that has timestamp that is set to 48 hours after the blog post. creation time Configure the DynamoDB table with a TTL that references the new attribute.

Discussion

Question 17

A healthcare company develops a patient monitoring application that uses AWS AppSync and an AWS Lambda function. The application stores patient data in an Amazon DynamoDB database. The application processes real-time patient vital signs from thousands of IoT devices. The application must support queries from medical staff who access patient historical data. A developer notices significant latency when medical staff query patient histories, specifically for frequently-accessed records of patients currently under observation. The developer observes that the Lambda functions are consuming high read capacity units (RCUs) from DynamoDB. The developer needs to optimize the application ' s performance and maintain data consistency. Which solution will meet these requirements?

Options:

Enable response caching in AppSync with a TTL value of 1 hour for all queries. Update the Lambda code to use in-memory caching.

Increase the Lambda function memory allocation to maximum. Configure provisioned concurrency for the function.

Create a caching Lambda function that aggregates patient data periodically and stores it in Amazon S3. Implement a read-through cache pattern.

Implement in-memory caching by using Amazon ElastiCache for frequently-accessed patient records. Configure the Lambda functions to check the cache before querying the database. Set up cache invalidation when patient data is updated.

Discussion

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Question 18

A developer creates a static website for their department The developer deploys the static assets for the website to an Amazon S3 bucket and serves the assets with Amazon CloudFront The developer uses origin access control (OAC) on the CloudFront distribution to access the S3 bucket

The developer notices users can access the root URL and specific pages but cannot access directories without specifying a file name. For example, /products/index.html works, but /products returns an error The developer needs to enable accessing directories without specifying a file name without exposing the S3 bucket publicly.

Which solution will meet these requirements ' ?

Options:

Update the CloudFront distribution ' s settings to index.html as the default root object is set

Update the Amazon S3 bucket settings and enable static website hosting. Specify index html as the Index document Update the S3 bucket policy to enable access. Update the CloudFront distribution ' s origin to use the S3 website endpoint

Create a CloudFront function that examines the request URL and appends index.html when directories are being accessed Add the function as a viewer request CloudFront function to the CloudFront distribution ' s behavior.

Create a custom error response on the CloudFront distribution with the HTTP error code set to the HTTP 404 Not Found response code and the response page path to /index html Set the HTTP response code to the HTTP 200 OK response code

Discussion

Question 19

A developer is testing a new file storage application that uses an Amazon CloudFront distribution to serve content from an Amazon S3 bucket. The distribution accesses the S3 bucket by using an origin access identity (OAI). The S3 bucket ' s permissions explicitly deny access to all other users.

The application prompts users to authenticate on a login page and then uses signed cookies to allow users to access their personal storage directories. The developer has configured the distribution to use its default cache behavior with restricted viewer access and has set the origin to point to the S3 bucket. However, when the developer tries to navigate to the login page, the developer receives a 403 Forbidden error.

The developer needs to implement a solution to allow unauthenticated access to the login page. The solution also must keep all private content secure.

Which solution will meet these requirements?

Options:

Add a second cache behavior to the distribution with the same origin as the default cache behavior. Set the path pattern for the second cache behavior to the path of the login page, and make viewer access unrestricted. Keep the default cache behavior ' s settings unchanged.

Add a second cache behavior to the distribution with the same origin as the default cache behavior. Set the path pattern for the second cache behavior to *, and make viewer access restricted. Change the default cache behavior ' s path pattern to the path of the login page, and make viewer access unrestricted.

Add a second origin as a failover origin to the default cache behavior. Point the failover origin to the S3 bucket. Set the path pattern for the primary origin to *, and make viewer access restricted. Set the path pattern for the failover origin to the path of the login page, and make viewer access unrestricted.

Add a bucket policy to the S3 bucket to allow read access. Set the resource on the policy to the Amazon Resource Name (ARN) of the login page object in the S3 bucket. Add a CloudFront function to the default cache behavior to redirect unauthorized requests to the login page ' s S3 URL.