Your Application Provides Data Transformation Services

question 838

Multiple Choice

Your application provides data transformation services. Files containing data to be transformed are first uploaded to Amazon S3 and then transformed by a fleet of spot EC2 instances. Files submitted by your premium customers must be transformed with the highest priority. How should you implement such a system?

• A) Use a DynamoDB table with an attribute defining the priority level. Transformation instances will scan the table for tasks, sorting the results by priority level.
• B) Use Route 53 latency based-routing to send high priority tasks to the closest transformation instances.
• C) Use two SQS queues, one for high priority messages, the other for default priority. Transformation instances first poll the high priority queue; if there is no message, they poll the default priority queue.
• D) Use a single SQS queue. Each message contains the priority level. Transformation instances poll high-priority messages first.

---

Definitions:

Robust Programs

Programs designed to handle errors gracefully and maintain functionality under various conditions.

Unexpected User Input

User inputs that the program does not anticipate, potentially causing errors or unexpected behaviors.

Standard

Refers to commonly accepted guidelines, protocols, or requirements in various fields, including programming and technology.

Magic Numbers

Hard-coded numeric or string values in code that lack context or explanation, making the code hard to understand or modify.