Quick Answer
The answer is the Data Flow activity. This is the correct choice because a Data Flow activity in Azure Synapse Pipelines is designed specifically for performing code-free transformations at scale, including filtering out rows with null values in the 'customer_id' column and adding a computed partition column like 'year' based on 'order_date', while natively writing the output as Parquet to ADLS Gen2. On the DP-203 exam, this scenario tests your understanding of when to use a Data Flow versus a Copy activity—the Copy activity can only move data without transformation, making it a common distractor. A key trap is assuming a Notebook is required for any transformation, but Data Flows handle column derivation and row filtering without Spark code. Remember the mnemonic: "Copy copies, Data Flow transforms"—if the task involves filtering or adding columns, always choose the Data Flow activity.
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.
Your company uses Azure Data Lake Storage Gen2 as a data lake. You need to process CSV files that arrive in a 'raw' container, transform them into Parquet format, and write them to a 'curated' container. The transformation includes filtering out rows with null values in the 'customer_id' column and adding a partition column 'year' based on the 'order_date'. You use Azure Synapse Pipelines. Which activity should you use for the transformation?
Stored procedure activity
Why wrong: Stored procedures are for SQL databases, not file transformations.
Notebook activity with PySpark
Why wrong: While possible, data flow is more appropriate for no-code transformation.
Copy data activity
Why wrong: Copy activity does not support row-level transformations.
Data flow activity
Data flows provide visual transformation with built-in mapping.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Data flow activity
Option C is correct because a data flow activity in Azure Synapse Pipelines can perform transformations like filtering and adding computed columns, and can write to ADLS Gen2 in Parquet format. Option A is wrong because Copy activity only copies data without transformation. Option B is wrong because Notebook activity requires Spark code; data flow is simpler for this scenario. Option D is wrong because Stored Procedure activity runs SQL, not file transformations.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Stored procedure activity
Why it's wrong here
Stored procedures are for SQL databases, not file transformations.
Notebook activity with PySpark
Why it's wrong here
While possible, data flow is more appropriate for no-code transformation.
Copy data activity
Why it's wrong here
Copy activity does not support row-level transformations.
Data flow activity
Why this is correct
Data flows provide visual transformation with built-in mapping.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Identify which DP-203 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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FAQ
Develop data processing — This question tests Develop data processing — Read the scenario before looking for a memorised answer..
The correct answer is: Data flow activity — Option C is correct because a data flow activity in Azure Synapse Pipelines can perform transformations like filtering and adding computed columns, and can write to ADLS Gen2 in Parquet format. Option A is wrong because Copy activity only copies data without transformation. Option B is wrong because Notebook activity requires Spark code; data flow is simpler for this scenario. Option D is wrong because Stored Procedure activity runs SQL, not file transformations.
Identify which DP-203 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jun 21, 2026
This DP-203 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DP-203 exam.
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