An Online Retailer Needs to Regularly Process Large Product Catalogs

question 171

Multiple Choice

An online retailer needs to regularly process large product catalogs, which are handled in batches. These are sent out to be processed by people using the Amazon Mechanical Turk service, but the retailer has asked its Solutions Architect to design a workflow orchestration system that allows it to handle multiple concurrent Mechanical Turk operations, deal with the result assessment process, and reprocess failures. Which of the following options gives the retailer the ability to interrogate the state of every workflow with the LEAST amount of implementation effort?

• A) Trigger Amazon CloudWatch alarms based upon message visibility in multiple Amazon SQS queues (one queue per workflow stage) and send messages via Amazon SNS to trigger AWS Lambda functions to process the next step. Use Amazon ES and Kibana to visualize Lambda processing logs to see the workflow states.
• B) Hold workflow information in an Amazon RDS instance with AWS Lambda functions polling RDS for status changes. Worker Lambda functions then process the next workflow steps. Amazon QuickSight will visualize workflow states directly out of Amazon RDS.
• C) Build the workflow in AWS Step Functions, using it to orchestrate multiple concurrent workflows. The status of each workflow can be visualized in the AWS Management Console, and historical data can be written to Amazon S3 and visualized using Amazon QuickSight.
• D) Use Amazon SWF to create a workflow that handles a single batch of catalog records with multiple worker tasks to extract the data, transform it, and send it through Mechanical Turk. Use Amazon ES and Kibana to visualize AWS Lambda processing logs to see the workflow states.

---

Definitions:

Door-In-The-Face Technique

A strategy in which someone makes a large, unreasonable request with the expectation that the person will refuse but will then be more likely to respond favorably to a smaller request later.

Foot-In-The-Door Effect

A psychological phenomenon where agreeing to a small initial request increases the likelihood of agreeing to a larger request later.

Door-In-The-Face Technique

A persuasion strategy whereby a larger, less achievable request is made first, followed by a smaller, more reasonable request.

Foot-In-The-Door Effect

A psychological principle that suggests agreeing to a small request increases the likelihood of agreeing to a larger request later.