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 audit, an administrator discovers duplicate CI records for the same network switch. The switch is identified by its serial number. The identification rule currently uses IP address and MAC address as identifiers. What is the most likely cause of the duplicate records?
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 serial number is not included in the identification rule.
The duplicate CI records exist because the identification rule does not include the serial number, which is the unique hardware identifier for the switch. Without it, the system cannot reliably match the discovered switch to an existing CI, so a new record is created each time the switch is discovered with a different IP or MAC address. Including the serial number in the identification rule ensures that the same physical device is always reconciled to the same CI record.
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.
✗
There is a conflict in the class hierarchy.
Why it's wrong here
Class hierarchy affects inheritance, not duplicate prevention.
✗
The discovery source is set to ServiceNow Discovery only, but multiple sources exist.
Why it's wrong here
Multiple sources should be handled by identification rules.
✗
The reconciliation rule is set to manual mode.
Why it's wrong here
Manual reconciliation may create conflicts but not necessarily duplicates.
✓
The serial number is not included in the identification rule.
Why this is correct
Without a unique identifier like serial number, duplicates can occur.
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.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume reconciliation rules (Option C) prevent duplicates, but duplicates are actually created during the identification phase, before reconciliation is ever applied.
Detailed technical explanation
How to think about this question
In ServiceNow CMDB, identification rules define which attributes (identifiers) are used to uniquely identify a CI during discovery. If the serial number is not included, the system may treat the same switch as a new CI each time it is discovered with a different IP address (e.g., after a DHCP lease change) or MAC address (e.g., if the switch has multiple interfaces). The identification engine uses a combination of identifiers to compute a unique hash; missing a stable identifier like serial number increases the risk of duplicates.
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 serial number is not included in the identification rule. — The duplicate CI records exist because the identification rule does not include the serial number, which is the unique hardware identifier for the switch. Without it, the system cannot reliably match the discovered switch to an existing CI, so a new record is created each time the switch is discovered with a different IP or MAC address. Including the serial number in the identification rule ensures that the same physical device is always reconciled to the same CI record.
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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This SNOW-CSA 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-CSA exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.