The answer is to create a reconciliation rule that gives Discovery higher priority than SCCM for the os_version attribute on the Windows Server CI class. This is correct because reconciliation rules allow you to set attribute-level data source priority, meaning you can define which source is authoritative for a specific field without blocking other sources from updating different attributes. In this scenario, Discovery’s value for os_version will be preserved, while SCCM can still update other attributes like location or manufacturer. On the CSA exam, this concept tests your understanding of CMDB data integrity and the difference between reconciliation rules (attribute-level) and identification rules (CI-level). A common trap is to disable reconciliation entirely or remove SCCM, which would break multi-source integration. Remember the memory tip: “Reconcile the attribute, not the whole record.”
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.
Your organization has implemented ServiceNow CMDB with multiple data sources including ServiceNow Discovery, SCCM, and manual imports. You notice that for a critical group of Windows servers, the 'os_version' attribute is being overwritten frequently. Upon investigation, you find that Discovery reports the correct version, but SCCM imports an older version that overwrites it. The Discovery source runs daily at 2 AM, and SCCM imports run at 4 AM. Currently, all data sources have equal priority. You need to ensure that the Discovery value is the authoritative source for os_version on these servers, but you do not want to block SCCM from updating other attributes. What is the best course of action?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a reconciliation rule that gives Discovery higher priority than SCCM for the os_version attribute on the Windows Server CI class.
Option D is correct because reconciliation rules allow you to define attribute-level priority between data sources without blocking SCCM from updating other attributes. By creating a rule that gives Discovery higher priority than SCCM specifically for the os_version attribute on the Windows Server CI class, Discovery's value will be authoritative for that attribute while SCCM can still update other attributes. This approach preserves the multi-source CMDB integrity without disabling reconciliation or removing SCCM entirely.
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.
✗
Remove SCCM as a data source for these servers.
Why it's wrong here
This would stop all updates from SCCM, not just os_version.
✗
Disable reconciliation for the Windows Server CI class.
Why it's wrong here
This would prevent conflict resolution entirely, leading to undefined behavior.
✗
Set the 'Preserve manual changes' flag on the CI class.
Why it's wrong here
This would prevent Discovery from updating if a manual change was made, but the issue is between automated sources.
✓
Create a reconciliation rule that gives Discovery higher priority than SCCM for the os_version attribute on the Windows Server CI class.
Why this is correct
This targets the specific attribute and source priority.
Clue confirmation
The clue word "best" 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 may confuse reconciliation rules with disabling reconciliation entirely or assume that removing a data source is the only way to prevent overwrites, missing the attribute-level granularity that reconciliation rules provide.
Detailed technical explanation
How to think about this question
Reconciliation rules in ServiceNow operate at the attribute level within a CI class, using a priority system (lower number = higher priority) to determine which data source's value is authoritative when conflicts occur. When a reconciliation rule is defined, the system evaluates the rule during the identification and reconciliation process, applying the priority to the specified attributes before the CI is updated. This allows granular control, such as giving Discovery priority for os_version while letting SCCM retain priority for other attributes like installed software or patch level.
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: Create a reconciliation rule that gives Discovery higher priority than SCCM for the os_version attribute on the Windows Server CI class. — Option D is correct because reconciliation rules allow you to define attribute-level priority between data sources without blocking SCCM from updating other attributes. By creating a rule that gives Discovery higher priority than SCCM specifically for the os_version attribute on the Windows Server CI class, Discovery's value will be authoritative for that attribute while SCCM can still update other attributes. This approach preserves the multi-source CMDB integrity without disabling reconciliation or removing SCCM entirely.
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: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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 →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. An organization is planning to implement CMDB for a large-scale environment with multiple data sources. They need to ensure that the most trustworthy data source takes precedence when conflicts occur. Which feature should they use?
hard
A.Identification & Reconciliation engine
B.Reconciliation
C.Set source precedence in the CI class manager for each CI
✓ D.Data Source Priority
Why D: Data Source Priority (Option D) is the correct feature because it allows administrators to define a hierarchy of data sources in the CMDB, ensuring that when multiple sources provide conflicting attribute values for the same CI, the source with the highest priority (lowest numeric value) is trusted and its data is used. This directly addresses the requirement to make the most trustworthy data source take precedence in a large-scale, multi-source environment.
Variation 2. A large financial institution uses ServiceNow CMDB to manage their IT infrastructure. They have a complex environment with multiple data sources: Discovery, SCCM, and a custom integration from their cloud provider. The CMDB contains over 100,000 CIs. Recently, the CMDB team noticed that for a specific set of Windows servers, the 'os_version' attribute is being updated to an incorrect value every night. The value comes from the SCCM integration, which is supposed to be the authoritative source for software-related attributes. However, the 'os_version' attribute should be authoritative from Discovery. The IRE is configured with reconciliation rules, but the issue persists. The team also finds that the Discovery job for these servers runs at 2:00 AM, and the SCCM integration runs at 3:00 AM. The incorrect value appears after the SCCM run. The reconciliation rules are set so that Discovery is authoritative for 'os_version', but the SCCM integration still overwrites it. What is the most likely cause and recommended action?
hard
A.Enable the IRE 'Strict' mode to prevent any updates from non-authoritative sources.
B.Disable the SCCM integration for these servers and rely solely on Discovery.
C.Change the order of the integrations so that SCCM runs before Discovery.
✓ D.Review and correct the reconciliation rule to ensure Discovery is the authoritative source for 'os_version' and that the rule is active.
Why D: Option D is correct because the reconciliation rule is the mechanism that dictates which data source is authoritative for a specific attribute. If the rule is misconfigured, inactive, or not properly scoped, the IRE will allow the SCCM integration to overwrite the 'os_version' attribute even though Discovery is intended to be authoritative. Reviewing and correcting the rule ensures that the IRE enforces the correct source priority for that attribute.
Variation 3. A company is using multiple data sources (Discovery, SCCM, and manual imports) to populate the CMDB. They notice that some CI attributes are being overwritten incorrectly. Which feature should be used to define which data source is authoritative for specific attributes?
medium
✓ A.Identification and Reconciliation Engine (IRE) with reconciliation rules
B.CMDB Data Source rules
C.Import set transform maps
D.Business rules with condition on source field
Why A: The Identification and Reconciliation Engine (IRE) with reconciliation rules is the correct feature because it allows administrators to define which data source is authoritative for specific CI attributes. When multiple sources populate the CMDB, reconciliation rules determine the priority of data sources, ensuring that attributes from a higher-priority source overwrite those from lower-priority sources, preventing incorrect overwrites.
Last reviewed: Jun 11, 2026
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