SNOW-CSA Database Administration and CMDB Practice Question
This SNOW-CSA practice question tests your understanding of database administration and cmdb. 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.
During a CMDB health review, an administrator finds that many CI records have the same serial number but different names and IP addresses. What is the most likely root cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
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 the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The identification rule for the CI class does not include the serial number.
The correct answer is C because the identification rule determines which fields are used to uniquely identify a CI. If the serial number is not included in the identification rule, the CMDB cannot detect duplicates based on serial number, allowing multiple CIs with the same serial number but different names and IP addresses to be created. This is a common misconfiguration that leads to CI proliferation and data inconsistency.
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 CMDB has a scheduled job that deletes old CIs.
Why it's wrong here
Deletion of old CIs would not create duplicates.
✗
The CI class has a unique constraint on the name field.
Why it's wrong here
Unique constraint on name would prevent duplicate names, not cause them.
✓
The identification rule for the CI class does not include the serial number.
Why this is correct
Without serial number as an identifier, the system creates new records instead of updating existing ones.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The reconciliation rule is set to 'Create' instead of 'Update'.
Why it's wrong here
Reconciliation rules control how duplicates are handled, not the root cause of duplicates.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse identification rules with reconciliation rules, assuming that reconciliation settings control duplicate detection, when in fact identification rules define the uniqueness criteria that trigger reconciliation.
Detailed technical explanation
How to think about this question
In ServiceNow, identification rules are part of the Identification and Reconciliation Engine (IRE) and define the set of fields (e.g., serial_number, model_id) that constitute a unique CI. If serial_number is omitted, the IRE treats each incoming record as a new CI even if the serial number matches an existing record, leading to CI duplicates. This is especially problematic in data center environments where hardware serial numbers are globally unique identifiers per manufacturer standards.
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 practitioner preparing for the SNOW-CSA 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 exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Database Administration and CMDB — This question tests Database Administration and CMDB — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The identification rule for the CI class does not include the serial number. — The correct answer is C because the identification rule determines which fields are used to uniquely identify a CI. If the serial number is not included in the identification rule, the CMDB cannot detect duplicates based on serial number, allowing multiple CIs with the same serial number but different names and IP addresses to be created. This is a common misconfiguration that leads to CI proliferation and data inconsistency.
What should I do if I get this SNOW-CSA question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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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