DP-203 Practice Question: Secure, monitor, and optimize data storage and data processing
This DP-203 practice question tests your understanding of secure, monitor, and optimize data storage and data processing. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
You have an Azure Data Factory pipeline defined as shown. The pipeline is failing because the preCopyScript truncates the staging table before each run, but the table is empty on the first run. What change would you make to ensure the pipeline works correctly?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Change the preCopyScript to: IF OBJECT_ID('dbo.Staging') IS NOT NULL TRUNCATE TABLE dbo.Staging.
Option B is correct because the preCopyScript should check if the table exists before truncating. The script 'IF OBJECT_ID('dbo.Staging') IS NOT NULL TRUNCATE TABLE dbo.Staging' handles the first run. Option A is wrong because setting writeBatchSize higher may cause memory issues. Option C is wrong because disabling recursive is not related to the truncate issue. Option D is wrong because the script is executed on each run, not only on the first.
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.
✗
Remove the preCopyScript entirely.
Why it's wrong here
Without truncation, data may be appended, which might not be desired.
✗
Increase the writeBatchSize to 50000 to speed up the copy.
Why it's wrong here
Batch size does not fix the truncate error.
✓
Change the preCopyScript to: IF OBJECT_ID('dbo.Staging') IS NOT NULL TRUNCATE TABLE dbo.Staging.
Why this is correct
This conditional truncation prevents error when table is empty.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Set recursive to false in the source.
Why it's wrong here
Recursive setting does not affect the truncate script.
Common exam traps
Common exam trap: answer the scenario, not the keyword
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
How to think about this question
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.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this DP-203 question in full detail.
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.
Secure, monitor, and optimize data storage and data processing — This question tests Secure, monitor, and optimize data storage and data processing — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Change the preCopyScript to: IF OBJECT_ID('dbo.Staging') IS NOT NULL TRUNCATE TABLE dbo.Staging. — Option B is correct because the preCopyScript should check if the table exists before truncating. The script 'IF OBJECT_ID('dbo.Staging') IS NOT NULL TRUNCATE TABLE dbo.Staging' handles the first run. Option A is wrong because setting writeBatchSize higher may cause memory issues. Option C is wrong because disabling recursive is not related to the truncate issue. Option D is wrong because the script is executed on each run, not only on the first.
What should I do if I get this DP-203 question wrong?
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.
Are there clue words in this question I should notice?
Yes — watch for: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
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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