DP-203 Develop data processing Practice Question
Which THREE components are required to implement a change data capture (CDC) solution in Azure Data Factory for incremental loading from Azure SQL Database to Azure Synapse Analytics?
⚠ Common exam trap
It's easy for candidates to assume CDC requires a Mapping Data Flow or Azure Functions for transformation or processing, when in fact the core pattern uses only Lookup and Copy activities with change tracking metadata.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
A Lookup activity to retrieve the last processed watermark.
A Lookup activity is required to retrieve the last processed watermark (e.g., a timestamp or LSN) from a control table or source query. This watermark defines the incremental boundary for CDC, ensuring only new or changed rows are loaded in each pipeline run. Without it, the pipeline would have no way to track progress and would either reload all data or miss changes.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
A Mapping Data Flow to transform the data before load.
Why it's wrong here
Optional, not required.
- ✓
A Lookup activity to retrieve the last processed watermark.
Why this is correct
Needed to get the last high-water mark.
- ✗
Azure Functions to process change data.
Why it's wrong here
Not required; ADF can handle.
- ✓
A Copy activity to transfer changed data to Synapse.
Why this is correct
Copies the delta data.
- ✓
Change Data Capture (CDC) enabled on the source Azure SQL Database tables.
Why this is correct
Required to track changes.
Visual reference
Go deeper
Related to this question
Learn chapter
Introduction to Azure Data Engineering
Key term
Azure Data Factory
Azure Data Factory is a cloud-based data integration service that lets you create, schedule, and orchestrate data pipelines to move and transform data from various sources to destinations.
Key term
Azure Synapse Analytics
Azure Synapse Analytics is a cloud-based data integration, warehousing, and analytics service that brings together big data and data warehouse capabilities under one platform.
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