You work for an Internet of Things (IoT) component manufacturer which builds servos, engines, sensors, etc. The IoT devices transmit usage and environment information back to AWS IoT Core via the MQTT protocol. You want to use a machine learning model to show how/where the use of your products is clustered in various regions around the world. This information will help your data scientists build KPI dashboards to improve your component engineering quality and performance. You have created, trained, and deployed to Amazon SageMaker Hosting Services your model based on the XGBoost algorithm. Your model is set up to receive inference requests from a lambda function that is triggered by the receipt of an IoT Core MQTT message via your Kinesis Data Streams instance.
What transform steps need to be done for each inference request? Also, which steps are handled by your code versus by the inference algorithm? (Select TWO)

Answer options:

A.Inference request serialization (handled by the algorithm)
B.Inference request serialization (handled by your lambda code)
C.Inference request deserialization (handled by your lambda code)
D.Inference request deserialization (handled by the algorithm)
E.Inference request post serialization (handled by the algorithm)

Answers: B, D
Option A is incorrect. The inference request serialization must be completed by your lambda code. The algorithm needs to receive the inference request in serialized form.
Option B is correct. The inference request serialization must be completed by your lambda code.
Option C is incorrect. The inference request is deserialized by the algorithm in response to the inference request. Your lambda code is responsible for serializing the inference request.
Option D is correct. The inference request is deserialized by the algorithm in response to the inference request.
Option E is incorrect. There is no inference request post serialization step in the SageMaker inference request/response process.
Reference:
Please see the Amazon SageMaker developer guide titled Common Data Formats for Inference, the AWS IoT Core overview page, the AWS IoT developer guide titled Creating an AWS Lambda Rule.