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NEW QUESTION 25
An Application Developer is using an AWS Lambda function that must use AWS KMS to perform encrypt and decrypt operations for API keys that are less than 2 KB.
Which key policy would allow the application to do this while granting least privilege?
- A.
- B.
- C.
- D.
Answer: D
NEW QUESTION 26
You are getting a lot of empty receive requests when using Amazon SQS.
This is making a lot of unnecessary network load on your instances.
What can you do to reduce this load?
- A. Use as long of a poll as possible, instead of short polls.
- B. Use <code>sqsd</code> on your EC2 instances.
- C. Subscribe your queue to an SNS topic instead.
- D. Alter your visibility timeout to be shorter.
Answer: A
Explanation:
One benefit of long polling with Amazon SQS is the reduction of the number of empty responses, when there are no messages available to return, in reply to a ReceiveMessage request sent to an Amazon SQS queue. Long polling allows the Amazon SQS service to wait until a message is available in the queue before sending a response.
NEW QUESTION 27
A company is running a batch analysis every hour on their main transactional DB running on an RDS MySQL instance to populate their central Data Warehouse running on Redshift. During the execution of the batch their transactional applications are very slow. When the batch completes they need to update the top management dashboard with the new data. The dashboard is produced by another system running on-premises that is currently started when a manually-sent email notifies that an update is required The on-premises system cannot be modified because is managed by another team. How would you optimize this scenario to solve performance issues and automate the process as much as possible?
- A. Create an RDS Read Replica for the batch analysis and SQS to send a message to the on-premises system to update the dashboard.
- B. Create an RDS Read Replica for the batch analysis and SNS to notify me on-premises system to update the dashboard
- C. Replace RDS with Redshift for the batch analysis and SNS to notify the on-premises system to update the dashboard
- D. Replace RDS with Redshift for the batch analysis and SQS to send a message to the on-premises system to update the dashboard
Answer: B
NEW QUESTION 28
An existing serverless application processes uploaded image files. The process currently uses a single Lambda function that takes an image file, performs the processing, and stores the file in Amazon S3. Users of the application now require thumbnail generation of the images. Users want to avoid any impact to the time it takes to perform the image uploads.
How can thumbnail generation be added to the application, meeting user requirements while minimizing changes to existing code?
- A. Create a second Lambda function that handles thumbnail generation and storage. Change the existing Lambda function to invoke it asynchronously.
- B. Change the existing Lambda function handling the uploads to create thumbnails at the time of upload. Have the function store both the image and thumbnail in Amazon S3.
- C. Create an S3 event notification to an SQS Queue. Create a scheduled Lambda function that processes the queue, and generates and stores thumbnails.
- D. Create an S3 event notification with a Lambda function destination. Create a new Lambda function to generate and store thumbnails.
Answer: D
Explanation:
https://docs.aws.amazon.com/lambda/latest/dg/with-s3-example.html
NEW QUESTION 29
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