SNOW-CSA Database Administration and CMDB Practice Question
This SNOW-CSA practice question tests your understanding of database administration and cmdb. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
An administrator is asked to design a solution to prevent unauthorized changes to the CMDB. The requirement is that any update to a CI's critical attributes (e.g., serial number, model) must be logged and require an approval. Which approach should be taken?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a business rule that fires on update, checks the previous values, and sends an approval request.
Option C is correct because a business rule that fires 'on update' with a condition checking previous values of critical attributes (e.g., serial number, model) can trigger an approval request via an approval engine or flow. This approach directly enforces the requirement that updates to those specific fields require approval before the change is committed, without relying on external modules or triggers that may bypass ServiceNow's native approval framework.
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 CMDB to use 'Data Certification' and require approval for attribute changes.
Why it's wrong here
Data certification is for periodic review, not real-time blocking.
✗
Use a database trigger that captures changes and creates a change request.
Why it's wrong here
Database triggers are not supported in ServiceNow.
✓
Create a business rule that fires on update, checks the previous values, and sends an approval request.
Why this is correct
A business rule with approval workflow can prevent unauthorized updates in real time.
Related concept
Read the scenario before looking for a memorised answer.
✗
Set field-level audit on the critical fields and use the 'Audit' module to report changes.
Why it's wrong here
Audit only logs, does not prevent changes.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse 'audit' (which only logs changes) with 'approval' (which prevents changes), leading them to select Option D, or they mistakenly think database triggers (Option B) are a valid ServiceNow mechanism when the platform explicitly prohibits direct database operations.
Detailed technical explanation
How to think about this question
Under the hood, a business rule with the 'before' or 'after' update qualifier can compare the 'previous' and 'current' values of a field using the 'changes()' or 'changed()' condition. When a critical attribute change is detected, the business rule can trigger an approval request by creating an 'Approval' record or invoking a flow, and optionally abort the update (by setting 'setAbortAction(true)') until approval is granted. In a real-world scenario, this ensures that changes to sensitive CI fields like serial number are gated by a manager's approval, preventing unauthorized or accidental modifications that could break CMDB integrity.
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 small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
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: Create a business rule that fires on update, checks the previous values, and sends an approval request. — Option C is correct because a business rule that fires 'on update' with a condition checking previous values of critical attributes (e.g., serial number, model) can trigger an approval request via an approval engine or flow. This approach directly enforces the requirement that updates to those specific fields require approval before the change is committed, without relying on external modules or triggers that may bypass ServiceNow's native approval framework.
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.
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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