Question 415 of 851

Develop data processing →hardMultiple ChoiceObjective-mapped

DP-203 Develop data processing Practice Question

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.

You are a data engineer working for a logistics company. You have an existing Azure Data Factory pipeline that ingests data from a REST API to Azure Data Lake Storage Gen2. The API has rate limiting that can cause failures. You need to implement a solution that can handle rate limiting by retrying with exponential backoff. The pipeline should also log the number of retries for each API call. What should you do?

A
Configure the Copy activity with retry policy using exponential backoff by setting the retry count and retry interval. Enable diagnostic logs to capture retry details.
Why wrong: Incorrect. The Copy activity's retry policy uses a fixed retry interval, not exponential backoff. It cannot achieve the required exponential backoff behavior.
B
Use a Web activity with a Until loop to implement custom retry logic.
Correct. Using a Web activity with an Until loop allows you to implement custom retry logic with exponential backoff, and you can log retry counts.
C
Use an Azure Function as a custom activity in Azure Data Factory to implement retry logic with exponential backoff.
Why wrong: Incorrect. While an Azure Function could implement retry logic, it adds unnecessary complexity and is not a native ADF solution compared to using a Web activity with a loop.
D
Use Azure Logic Apps to call the API and then copy the response to Azure Data Lake Storage Gen2.
Why wrong: Incorrect. Azure Logic Apps is a separate service that would add integration complexity without providing a clear advantage over ADF's built-in capabilities for this scenario.

Full breakdown with real-world context →

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

✓

Use a Web activity with a Until loop to implement custom retry logic.

Option B is correct because Azure Data Factory Copy activity does not support exponential backoff; the retry interval is fixed. Using a Web activity inside an Until loop allows you to implement custom retry logic with exponential backoff by adjusting the wait time dynamically. This also enables logging the number of retries. Option A is incorrect because the Copy activity's retry uses a fixed interval, not exponential backoff. Option C is more complex than necessary. Option D introduces an additional service without leveraging ADF's orchestration capabilities.

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.

✗
Configure the Copy activity with retry policy using exponential backoff by setting the retry count and retry interval. Enable diagnostic logs to capture retry details.
Why it's wrong here
Incorrect. The Copy activity's retry policy uses a fixed retry interval, not exponential backoff. It cannot achieve the required exponential backoff behavior.
✓
Use a Web activity with a Until loop to implement custom retry logic.
Why this is correct
Correct. Using a Web activity with an Until loop allows you to implement custom retry logic with exponential backoff, and you can log retry counts.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use an Azure Function as a custom activity in Azure Data Factory to implement retry logic with exponential backoff.
Why it's wrong here
Incorrect. While an Azure Function could implement retry logic, it adds unnecessary complexity and is not a native ADF solution compared to using a Web activity with a loop.
✗
Use Azure Logic Apps to call the API and then copy the response to Azure Data Lake Storage Gen2.
Why it's wrong here
Incorrect. Azure Logic Apps is a separate service that would add integration complexity without providing a clear advantage over ADF's built-in capabilities for this scenario.

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.

Trap categories for this question

Scenario analysis trap
Incorrect. Azure Logic Apps is a separate service that would add integration complexity without providing a clear advantage over ADF's built-in capabilities for this scenario.

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.

What to study next

Got this wrong? Here's your next step.

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

Questions learners often ask

What does this DP-203 question test?

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: Use a Web activity with a Until loop to implement custom retry logic. — Option B is correct because Azure Data Factory Copy activity does not support exponential backoff; the retry interval is fixed. Using a Web activity inside an Until loop allows you to implement custom retry logic with exponential backoff by adjusting the wait time dynamically. This also enables logging the number of retries. Option A is incorrect because the Copy activity's retry uses a fixed interval, not exponential backoff. Option C is more complex than necessary. Option D introduces an additional service without leveraging ADF's orchestration capabilities.

What should I do if I get this DP-203 question wrong?

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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