This DP-203 practice question tests your understanding of develop data processing. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
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?
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.
Option B is correct because 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.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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.
Related concept
Read the scenario before looking for a memorised answer.
✗
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.
Related concept
Read the scenario before looking for a memorised answer.
✓
Change Data Capture (CDC) enabled on the source Azure SQL Database tables.
Why this is correct
Required to track changes.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often 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.
Detailed technical explanation
How to think about this question
Under the hood, the Lookup activity typically queries a watermark table (e.g., LastProcessedTime) or uses the sys.dm_change_tracking_current_version function to get the current change tracking version. The Copy activity then uses a query with a WHERE clause filtering on the watermark (e.g., SYS_CHANGE_VERSION > @{activity('LookupWatermark').output.firstRow.WatermarkValue}) to extract only changed rows. In real-world scenarios, you must also handle high-watermark updates after a successful load to avoid reprocessing the same changes.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this DP-203 question in full detail.
Develop data processing — This question tests Develop data processing — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: A Lookup activity to retrieve the last processed watermark. — Option B is correct because 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.
What should I do if I get this DP-203 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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