- A
The source data contains multiple records with the same 'asset_tag' but different case.
Why wrong: Incorrect: The source data is stated to have unique asset_tag values, so case variation is not the cause.
- B
The 'Enable Duplicate Detection' checkbox is not properly configured.
Why wrong: Incorrect: The scenario states it is checked, and the feature is correctly enabled.
- C
The import set table lacks a unique index on the 'asset_tag' field.
Correct: A unique index on the import set table is required for the duplicate detection mechanism to work within the import set; without it, duplicates can be created.
- D
The coalesce field mapping is incorrectly mapped to the 'asset_tag' field.
Why wrong: Incorrect: If the mapping were incorrect, the import would likely fail or not update, but duplicates would not be created in such large numbers.
SNOW-CAD Working with Data Practice Question
This SNOW-CAD practice question tests your understanding of working with data. 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.
A large enterprise is importing 500,000 asset records from an external inventory system using a scheduled data import into the alm_asset table. The transform map uses a coalesce on the 'asset_tag' field to match existing records. The 'asset_tag' field in the target table is a string field with a unique index. The import set table has no unique index on any field. The transform map has 'Enable Duplicate Detection' checked. After the first import, the team notices that many duplicate records were created instead of updating existing ones. There are no errors in the import log. The source data contains only unique asset_tag values. What is the most likely cause of the duplicates?
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.
Clue:
"most likely"Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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
The import set table lacks a unique index on the 'asset_tag' field.
The correct answer is C. The import set table lacks a unique index on the 'asset_tag' field. For duplicate detection to work properly during an import, the import set table must have a unique index on the coalesce field (here 'asset_tag'). Without that index, the system cannot detect duplicates within the same import set, causing multiple records to be inserted instead of updated. Option A is incorrect because the source data contains unique asset_tag values, so case differences are not the issue. Option B is incorrect because the 'Enable Duplicate Detection' checkbox is checked, so it is configured. Option D is incorrect because the coalesce field mapping is correctly set to 'asset_tag'.
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.
- ✗
The source data contains multiple records with the same 'asset_tag' but different case.
Why it's wrong here
Incorrect: The source data is stated to have unique asset_tag values, so case variation is not the cause.
- ✗
The 'Enable Duplicate Detection' checkbox is not properly configured.
Why it's wrong here
Incorrect: The scenario states it is checked, and the feature is correctly enabled.
- ✓
The import set table lacks a unique index on the 'asset_tag' field.
Why this is correct
Correct: A unique index on the import set table is required for the duplicate detection mechanism to work within the import set; without it, duplicates can be created.
Clue confirmation
The clue words "first", "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
The coalesce field mapping is incorrectly mapped to the 'asset_tag' field.
Why it's wrong here
Incorrect: If the mapping were incorrect, the import would likely fail or not update, but duplicates would not be created in such large numbers.
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: The scenario states it is checked, and the feature is correctly enabled.
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 practitioner preparing for the SNOW-CAD exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which SNOW-CAD 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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Working with Data — study guide chapter
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FAQ
Questions learners often ask
What does this SNOW-CAD question test?
Working with Data — This question tests Working with Data — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The import set table lacks a unique index on the 'asset_tag' field. — The correct answer is C. The import set table lacks a unique index on the 'asset_tag' field. For duplicate detection to work properly during an import, the import set table must have a unique index on the coalesce field (here 'asset_tag'). Without that index, the system cannot detect duplicates within the same import set, causing multiple records to be inserted instead of updated. Option A is incorrect because the source data contains unique asset_tag values, so case differences are not the issue. Option B is incorrect because the 'Enable Duplicate Detection' checkbox is checked, so it is configured. Option D is incorrect because the coalesce field mapping is correctly set to 'asset_tag'.
What should I do if I get this SNOW-CAD question wrong?
Identify which SNOW-CAD 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", "most likely". 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.
About these practice questions
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Last reviewed: Jun 24, 2026
This SNOW-CAD practice question is part of Courseiva's free ServiceNow 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 SNOW-CAD exam.
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