Prepare data — Microsoft Certified: Fabric Analytics Engineer Associate

The official AZURE documentation our Prepare data practice questions are cited to. Review the primary sources, then practise.

Official references for this objective

Microsoft — Data Types - Stream Analytics Query | Microsoft Learn

You can pre-process the data and convert it to string. One option is using Azure functions to pre-process the data and convert such large integers
Microsoft — Reference Data JOIN - Stream Analytics Query | Microsoft Learn

Using complex expressions, or inequalities, will internally result in cross joins followed by filters (full scan vs lookup), which can severly impact the overall latency.
Microsoft — Big Data, Multivariate, Window based Feature Engineering using Microsoft R Server | Microsoft Learn

the important aspect that needs to be captured for prediction is the multivariate relationship between different sensors, rather than isolated sensors statistics
Microsoft — Get started with Microsoft Fabric Ep05: Ingest Data with Dataflows Gen2 in Microsoft Fabric | Microsoft Learn

Microsoft Fabric's Data Factory offers Dataflows (Gen2) for visually creating multi-step data ingestion and transformation using Power Query Online