509 questions with instant explanations, domain breakdown, and wrong-answer analysis. Built for the real exam.
This exam was retired by the vendor on March 31, 2025.
DP-203 can no longer be scheduled. The practice material below remains available for reference and for learners studying the underlying skills. See DP-700: Microsoft Fabric Data Engineer Associate
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You are optimizing a data pipeline in Azure Synapse Analytics that loads data from a CSV file in ADLS Gen2 into a dedicated SQL pool using PolyBase. The load is slow and you need to improve performance. Which action would be MOST effective?
Combining many small CSV files into fewer, larger files reduces the number of file open/close operations and minimizes the overhead of PolyBase's external file enumeration and parallel split logic. PolyBase performs best when each file is at least 256 MB, as it can then assign a …Read full explanation
Which THREE considerations should be evaluated when designing a partitioning strategy for a large fact table in Azure Synapse Dedicated SQL Pool?
Option A is correct because aligning partition boundaries with the distribution key ensures that rows sharing the same distribution value also fall into the same partition, which minimizes data movement during partition switching and improves join and aggregation performance in a…Read full explanation
You need to implement column-level security in Azure Synapse Analytics to restrict access to salary information. Only users with the 'HRManager' role should see salary columns. Which feature should you use?
Column-level security (CLS) in Azure Synapse Analytics uses GRANT on specific columns to restrict access. Option A is incorrect because row-level security filters rows, not columns. Option B is incorrect because dynamic data masking obfuscates data but does not prevent access. Op…Read full explanation
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