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Amazon AWS Certified Solutions Architect - Associate Sample Questions (Q266-Q271):

NEW QUESTION # 266
[Design Secure Architectures]
A company has a serverless website with millions of objects in an Amazon S3 bucket. The company uses the S3 bucket as the origin for an Amazon CloudFront distribution. The company did not set encryption on the S3 bucket before the objects were loaded. A solutions architect needs to enable encryption for all existing objects and for all objects that are added to the S3 bucket in the future.
Which solution will meet these requirements with the LEAST amount of effort?

A. Turn on the default encryption settings for the S3 bucket. Use the S3 Inventory feature to create a .csv file that lists the unencrypted objects. Run an S3 Batch Operations job that uses the copy command to encrypt those objects.
B. Create a new encryption key by using AWS Key Management Service (AWS KMS). Change the settings on the S3 bucket to use server-side encryption with AWS KMS managed encryption keys (SSE-KMS). Turn on versioning for the S3 bucket.
C. Navigate to Amazon S3 in the AWS Management Console. Browse the S3 bucket's objects. Sort by the encryption field. Select each unencrypted object. Use the Modify button to apply default encryption settings to every unencrypted object in the S3 bucket.
D. Create a new S3 bucket. Turn on the default encryption settings for the new S3 bucket. Download all existing objects to temporary local storage. Upload the objects to the new S3 bucket.

Answer: A

Explanation:
https://spin.atomicobject.com/2020/09/15/aws-s3-encrypt-existing-objects/

NEW QUESTION # 267
A company wants to migrate an on-premises legacy application to AWS. The application ingests customer order files from an on-premises enterprise resource planning (ERP) system. The application then uploads the files to an SFTP server. The application uses a scheduled job that checks for order files every hour.
The company already has an AWS account that has connectivity to the on-premises network. The new application on AWS must support integration with the existing ERP system. The new application must be secure and resilient and must use the SFTP protocol to process orders from the ERP system immediately.
Which solution will meet these requirements?

A. Create an AWS Transfer Family SFTP internal server in two Availability Zones. Use Amazon S3 storage. Create an AWS Lambda function to process order files. Use a Transfer Family managed workflow to invoke the Lambda function.
B. Create an AWS Transfer Family SFTP internal server in two Availability Zones. Use Amazon Elastic File System (Amazon EFS) storage. Create an AWS Step Functions state machine to process order files.
Use Amazon EventBridge Scheduler to invoke the state machine to periodically check Amazon EFS for order files.
C. Create an AWS Transfer Family SFTP internet-facing server in one Availability Zone. Use Amazon Elastic File System (Amazon EFS) storage. Create an AWS Lambda function to process order files. Use a Transfer Family managed workflow to invoke the Lambda function.
D. Create an AWS Transfer Family SFTP internet-facing server in two Availability Zones. Use Amazon S3 storage. Create an AWS Lambda function to process order files. Use S3 Event Notifications to send s3:
ObjectCreated: * events to the Lambda function.

Answer: A

Explanation:
This solution meets the requirements because it uses the following components and features:
* AWS Transfer Family SFTP internal server: This allows the application to securely transfer order files
* from the on-premises ERP system to AWS using the SFTP protocol over a private connection. The internal server is deployed in two Availability Zones for high availability and fault tolerance.
* Amazon S3 storage: This provides scalable, durable, and cost-effective object storage for the order files.
Amazon S3 also supports encryption at rest and in transit, as well as lifecycle policies and versioning for data protection and compliance.
* AWS Lambda function: This enables the application to process the order files in a serverless manner, without provisioning or managing servers. The Lambda function can perform any custom logic or transformation on the order files, such as validating, parsing, or enriching the data.
* Transfer Family managed workflow: This simplifies the orchestration of the file processing tasks by triggering the Lambda function as soon as a file is uploaded to the SFTP server. The managed workflow also provides error handling, retry policies, and logging capabilities.

NEW QUESTION # 268
A company has clients all across the globe that access product files stored in several S3 buckets, which are behind each of their own CloudFront web distributions. They currently want to deliver their content to a specific client, and they need to make sure that only that client can access the data.
Currently, all of their clients can access their S3 buckets directly using an S3 URL or through their CloudFront distribution. The Solutions Architect must serve the private content via CloudFront only, to secure the distribution of files.
Which combination of actions should the Architect implement to meet the above requirements? (Select TWO.)

A. Restrict access to files in the origin by creating an origin access identity (OAI) and give it permission to read the files in the bucket.
B. Use S3 pre-signed URLs to ensure that only their client can access the files. Remove permission to use Amazon S3 URLs to read the files for anyone else.
C. Enable the Origin Shield feature of the Amazon CloudFront distribution to protect the files from unauthorized access.
D. Create a custom CloudFront function to check and ensure that only their clients can access the files.
E. Require the users to access the private content by using special CloudFront signed URLs or signed cookies.

Answer: A,E

Explanation:
Many companies that distribute content over the Internet want to restrict access to documents, business data, media streams, or content that is intended for selected users, for example, users who have paid a fee. To securely serve this private content by using CloudFront, you can do the following:
- Require that your users access your private content by using special CloudFront signed URLs or signed cookies.
- Require that your users access your Amazon S3 content by using CloudFront URLs, not Amazon S3 URLs. Requiring CloudFront URLs isn't necessary, but it is recommended to prevent users from bypassing the restrictions that you specify in signed URLs or signed cookies. You can do this by setting up an origin access identity (OAI) for your Amazon S3 bucket. You can also configure the custom headers for a private HTTP server or an Amazon S3 bucket configured as a website endpoint.
All objects and buckets by default are private. The pre-signed URLs are useful if you want your user/customer to be able to upload a specific object to your bucket, but you don't require them to have AWS security credentials or permissions.

You can generate a pre-signed URL programmatically using the AWS SDK for Java or the AWS SDK for
.NET. If you are using Microsoft Visual Studio, you can also use AWS Explorer to generate a pre-signed object URL without writing any code. Anyone who receives a valid pre-signed URL can then programmatically upload an object.
Hence, the correct answers are:
- Restrict access to files in the origin by creating an origin access identity (OAI) and give it permission to read the files in the bucket.
- Require the users to access the private content by using special CloudFront signed URLs or signed cookies.
The option that says: Create a custom CloudFront function to check and ensure that only their clients can access the files is incorrect. CloudFront Functions are just lightweight functions in JavaScript for high-scale, latency-sensitive CDN customizations and not for enforcing security. A CloudFront Function runtime environment offers submillisecond startup times which allows your application to scale immediately to handle millions of requests per second. But again, this can't be used to restrict access to your files.
The option that says: Enable the Origin Shield feature of the Amazon CloudFront distribution to protect the files from unauthorized access is incorrect because this feature is not primarily used for security but for improving your origin's load times, improving origin availability, and reducing your overall operating costs in CloudFront.
The option that says: Use S3 pre-signed URLs to ensure that only their client can access the files.
Remove permission to use Amazon S3 URLs to read the files for anyone else is incorrect. Although this could be a valid solution, it doesn't satisfy the requirement to serve the private content via CloudFront only to secure the distribution of files. A better solution is to set up an origin access identity (OAI) then use Signed URL or Signed Cookies in your CloudFront web distribution.
References:
https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/PrivateContent.html
https://docs.aws.amazon.com/AmazonS3/latest/dev/PresignedUrlUploadObject.html Check out this Amazon CloudFront cheat sheet: https://tutorialsdojo.com/amazon-cloudfront/ S3 Pre-signed URLs vs CloudFront Signed URLs vs Origin Access Identity (OAI)
https://tutorialsdojo.com/s3-pre-signed-urls-vs-cloudfront-signed-urls-vs-origin-access-identity-oai/ Comparison of AWS Services Cheat Sheets:
https://tutorialsdojo.com/comparison-of-aws-services/

NEW QUESTION # 269
A company is deploying an application that processes streaming data in near-real time The company plans to use Amazon EC2 instances for the workload The network architecture must be configurable to provide the lowest possible latency between nodes Which combination of network solutions will meet these requirements? (Select TWO)

A. Enable and configure enhanced networking on each EC2 instance
B. Attach multiple elastic network interfaces to each EC2 instance
C. Use Amazon Elastic Block Store (Amazon EBS) optimized instance types.
D. Run the EC2 instances in a cluster placement group
E. Group the EC2 instances in separate accounts

Answer: A,D

Explanation:
These options are the most suitable ways to configure the network architecture to provide the lowest possible latency between nodes. Option A enables and configures enhanced networking on each EC2 instance, which is a feature that improves the network performance of the instance by providing higher bandwidth, lower latency, and lower jitter. Enhanced networking uses single root I/O virtualization (SR-IOV) or Elastic Fabric Adapter (EFA) to provide direct access to the network hardware. You can enable and configure enhanced networking by choosing a supported instance type and a compatible operating system, and installing the required drivers. Option C runs the EC2 instances in a cluster placement group, which is a logical grouping of instances within a single Availability Zone that are placed close together on the same underlying hardware.
Cluster placement groups provide the lowest network latency and the highest network throughput among the placement group options. You can run the EC2 instances in a cluster placement group by creating a placement group and launching the instances into it.
Option B is not suitable because grouping the EC2 instances in separate accounts does not provide the lowest possible latency between nodes. Separate accounts are used to isolate and organize resources for different purposes, such as security, billing, or compliance. However, they do not affect the network performance or proximity of the instances. Moreover, grouping the EC2 instances in separate accounts would incur additional costs and complexity, and it would require setting up cross-account networking and permissions.
Option D is not suitable because attaching multiple elastic network interfaces to each EC2 instance does not provide the lowest possible latency between nodes. Elastic network interfaces are virtual network interfaces that can be attached to EC2 instances to provide additional network capabilities, such as multiple IP addresses, multiple subnets, or enhanced security. However, they do not affect the network performance or proximity of the instances. Moreover, attaching multiple elastic network interfaces to each EC2 instance would consume additional resources and limit the instance type choices.
Option E is not suitable because using Amazon EBS optimized instance types does not provide the lowest possible latency between nodes. Amazon EBS optimized instance types are instances that provide dedicated bandwidth for Amazon EBS volumes, which are block storage volumes that can be attached to EC2 instances.
EBS optimized instance types improve the performance and consistency of the EBS volumes, but they do not affect the network performance or proximity of the instances. Moreover, using EBS optimized instance types would incur additional costs and may not be necessary for the streaming data workload. References:
* Enhanced networking on Linux
* Placement groups
* Elastic network interfaces
* Amazon EBS-optimized instances

NEW QUESTION # 270
A company is developing a marketing communications service that targets mobile app users. The company needs to send confirmation messages with Short Message Service (SMS) to its users. The users must be able to reply to the SMS messages. The company must store the responses for a year for analysis.
What should a solutions architect do to meet these requirements?

A. Build an Amazon Pinpoint journey. Configure Amazon Pinpoint to send events to an Amazon Kinesis data stream for analysis and archiving.
B. Create an Amazon Simple Notification Service (Amazon SNS) FIFO topic. Subscribe an Amazon Kinesis data stream to the SNS topic for analysis and archiving.
C. Use Amazon Simple Queue Service (Amazon SQS) to distribute the SMS messages. Use AWS Lambda to process the responses.
D. Create an Amazon Connect contact flow to send the SMS messages. Use AWS Lambda to process the responses.

Answer: A

Explanation:
https://aws.amazon.com/pinpoint/product-details/sms/ Two-Way Messaging: Receive SMS messages from your customers and reply back to them in a chat-like interactive experience. With Amazon Pinpoint, you can create automatic responses when customers send you messages that contain certain keywords. You can even use Amazon Lex to create conversational bots. A majority of mobile phone users read incoming SMS messages almost immediately after receiving them. If you need to be able to provide your customers with urgent or important information, SMS messaging may be the right solution for you. You can use Amazon Pinpoint to create targeted groups of customers, and then send them campaign-based messages. You can also use Amazon Pinpoint to send direct messages, such as appointment confirmations, order updates, and one-time passwords.

NEW QUESTION # 271
......

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