20+ practice questions focused on CMDB — one of the most tested topics on the ServiceNow Certified Implementation Specialist - IT Service Management (CIS-ITSM) (CIS-ITSM) exam. Each question includes a detailed explanation so you learn why the right answer is correct.
Start CMDB PracticeAn organization requires that network gear attributes can only be updated by the Network Discovery data source, while server attributes can be updated by both Discovery and a manual import set. Where must this restriction be configured?
Explanation: Reconciliation Definitions are used to specify which data source can update which attributes on a CI. By configuring reconciliation definitions, you can set rules that allow only the Network Discovery data source to update network gear attributes, while allowing both Discovery and manual import sets to update server attributes. This provides granular control over attribute-level data source precedence.
An administrator needs to ensure that network gear discovered by Discovery is classified under a specific custom child table of cmdb_ci_netgear. Where should the administrator define the classification criteria to map network devices to this custom table?
Explanation: The CI Class Manager is the central console in ServiceNow for managing the CMDB class hierarchy, including creating custom child classes and defining the identification and reconciliation rules that determine which class a discovered CI is placed into. When Discovery finds a network device, the classification criteria (such as SNMP sysObjectID, sysDescr patterns, or other attributes) defined in CI Class Manager determine whether the CI lands in cmdb_ci_netgear or a custom child table. This makes CI Class Manager the correct place to map discovered network gear to a custom child table.
During an import of server CIs, duplicate records are being created because different data sources send serial numbers in different cases (uppercase vs lowercase). Which configuration in Identification and Reconciliation Engine (IRE) will prevent this issue?
Explanation: The Identification and Reconciliation Engine (IRE) allows each identifier entry (such as Serial Number) to be configured with a 'case insensitive' flag. When enabled, IRE normalizes the incoming value before matching, so 'ABC123' and 'abc123' resolve to the same CI instead of creating two records. This is the correct, targeted fix because the duplication is caused purely by case variance in the identifier value.
An organization defines a multi-attribute identification rule for the Linux Server class using 'serial_number' and 'ip_address'. During a payload execution, the IRE finds an existing CI matching the serial number, but the IP address has changed. How does the IRE process this payload?
Explanation: The IRE uses multi-attribute identification rules to determine if a payload matches an existing CI. When multiple attributes are defined, the rule is satisfied if any one of the attributes matches (OR logic). Here, the serial number matches an existing CI, so the IRE treats the payload as the same CI and updates the CI's attributes—including the changed IP address—with the new values from the payload. This ensures the CMDB reflects the current state of the asset without creating duplicates.
An engineer needs to add a custom attribute called 'Rack Number' to all Linux Server CIs. Where should this modification be performed to ensure it applies correctly to the table hierarchy?
Explanation: CI Class Manager is the correct place to add a custom attribute to all Linux Server CIs because it manages the CI class hierarchy and allows attributes to be added at the appropriate class level, ensuring inheritance to child classes. Adding the attribute via CI Class Manager on the Linux Server class ensures it applies correctly across the hierarchy. This is the ServiceNow-recommended approach for extending CI classes.
+15 more CMDB questions available
Practice all CMDB questions1. Baseline your knowledge
Start with 10 questions to gauge your current understanding of CMDB. This tells you whether you need a concept refresher or just practice.
2. Review every explanation
For each question — right or wrong — read the full explanation. Understanding why an answer is correct is more valuable than knowing the answer itself.
3. Focus on exam traps
CMDB questions on the CIS-ITSM frequently use trap wording. Look for subtle differences in answers that test your precision, not just general knowledge.
4. Reach 80% consistently
Do repeated sessions until you score 80%+ three times in a row. Then move to mixed-mode practice to test cross-topic recall under realistic conditions.
The exact number varies per candidate. CMDB is tested as part of the ServiceNow Certified Implementation Specialist - IT Service Management (CIS-ITSM) (CIS-ITSM) blueprint. Practicing with targeted CMDB questions ensures you can handle any format or difficulty that appears.
Yes. Courseiva provides free CIS-ITSM practice questions across all exam topics and domains. The platform includes topic-based practice, mock exams, missed-question review, bookmarked questions, and readiness tracking — no account required.
Difficulty is subjective, but CMDB is a high-priority exam concept tested in multiple ways — direct recall, scenario analysis, and command-output interpretation. Consistent practice is the best way to build confidence.
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