CIS-DF Configuration — Timed 10 Questions

Question 1

A team is designing a custom CMDB class for virtual storage arrays. They need to ensure that when a physical host is deleted, the dependent virtual storage array records are also cleaned up. Where should this cascading delete behavior be defined?

10 minute time limit — choose an answer to begin.

Accepted Answer

CI Class Manager under the relationship rules section. Cascading delete behavior for CMDB CIs is defined in CI Class Manager under the relationship rules section, where administrators configure how dependent CIs are handled when a parent CI is deleted. This is the supported, upgrade-safe location for defining cascade rules, rather than writing custom business rules or scripts.

Answer

Business Rules on the cmdb_ci table

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Data Dictionary [sys_dictionary] attribute settings

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IRE payload processor scripts

Question 2

An administrator is reviewing the CMDB class hierarchy and needs to modify attributes that apply to all types of servers (Linux, Windows, AIX). Which table should be updated to ensure all server sub-classes inherit the new attribute?

Accepted Answer

cmdb_ci_server. The correct table is cmdb_ci_server because it is the parent class for all server types (Linux, Windows, AIX) in the CMDB class hierarchy. Modifying attributes at this level ensures that all sub-classes (e.g., cmdb_ci_win_server, cmdb_ci_linux_server, cmdb_ci_aix_server) inherit the new attribute. This follows ServiceNow's CMDB class inheritance model, where child classes automatically inherit attributes from their parent. Thus, updating cmdb_ci_server applies the change to all server types without needing to modify each sub-class individually.

Answer

cmdb_ci

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cmdb_ci_win_server

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cmdb_ci_computer

Question 3

Your organization wants to ensure that all virtual machine CIs contain a mandatory 'Environment' tag attribute. Where should this attribute be added to ensure it is inherited by all virtual machine subclasses?

Accepted Answer

cmdb_ci_vm_instance table. Adding the 'Environment' attribute to the cmdb_ci_vm_instance table ensures it is inherited by all virtual machine subclasses, because cmdb_ci_vm_instance is the parent class for VM instance types (e.g., cmdb_ci_vmware_instance, cmdb_ci_ec2_instance). Attributes defined on a parent class are automatically available on child classes in ServiceNow's class hierarchy. This is the correct place to enforce a mandatory attribute across all VM CIs.

Answer

cmdb_ci_appl table

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cmdb_rel_ci table

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sys_user table

Question 4

Which ServiceNow table is designated as the universal base table from which all Configuration Item classes ultimately inherit?

Accepted Answer

cmdb. The cmdb table is the root table for all configuration items in ServiceNow.

Answer

cmdb_ci

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cmdb_rel_ci

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task

Question 5

An administrator needs to create a new relationship type between databases and storage volumes that does not exist out-of-the-box. Which table should be updated to define this new relationship type?

Accepted Answer

cmdb_rel_type. The cmdb_rel_type table stores the definitions of relationship types in the CMDB. To create a new relationship type between databases and storage volumes, you must add a new record to this table specifying the parent class, child class, and relationship type name. This is the correct table for defining relationship types.

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cmdb_ci_rel_server

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cmdb_rel_ci

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sys_choice

Question 6

When analyzing CMDB data quality, you discover multiple records representing the exact same physical server, but they were created by different discovery tools with slightly different naming conventions. The IRE successfully merges them during updates, but initial creation still generates duplicates. What is the root cause?

Accepted Answer

Reconciliation definitions are set to allow multiple sources.. The root cause is twofold: the reconciliation definitions are configured to allow multiple sources (Option A), and the identification rules for the server class lack matching criteria that cover the unique attributes provided by both discovery tools (Option D). When reconciliation allows multiple sources, the IRE does not enforce a single authoritative source, so duplicates can persist if identification rules fail to uniquely match records. Additionally, if identification rules do not include attributes that are common to both tools (e.g., serial number, MAC address), the IRE cannot correlate the records during initial creation, resulting in duplicates. Both conditions together explain why merging occurs only during updates (when reconciliation runs) but not at creation.

Answer

The cmdb_rel_ci table is missing indexes.

Answer

The CMDB Health Dashboard needs to be restarted.

Question 7

A company has implemented strict data governance where CIs that have not been discovered or updated in over 90 days are considered stale. Where should this threshold be configured in ServiceNow?

Accepted Answer

CMDB Health Dashboard Correctness settings. Stale CI thresholds are configured within the Correctness settings of the CMDB Dashboard / CI Class Manager audit rules.

Answer

CI Class Manager relationship rule definitions

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Discovery Schedule properties

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Data Archiving rule definitions

Question 8

Which TWO metrics are part of the Correctness pillar in the CMDB Health Dashboard? (Choose two.)

Accepted Answer

Orphans. In the CMDB Health Dashboard, the Correctness pillar measures whether CIs are properly related and free of structural data problems, and its two metrics are Orphans (B) and Duplicates (E). Orphans (B) is correct because it counts CIs that have no relationships to any other CI, which is a correctness defect since a CI with no relations cannot be validated as part of the CMDB graph. Duplicates (E) is correct because it identifies multiple CIs that appear to represent the same real-world item, another correctness defect that undermines the integrity of the CMDB. The other options belong to different pillars: Software license audit compliance (A) relates to the Compliance pillar, while Required fields populated (C) and Recommended attributes filled (D) are Completeness pillar metrics, so they are not part of Correctness.

Answer

Software license audit compliance

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Required fields populated

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Recommended attributes filled

Question 9

Which TWO pillars comprise the standard CMDB Health Dashboard scoring model? (Choose two.)

Accepted Answer

Correctness. The CMDB Health Dashboard in ServiceNow scores CI data quality across three standard pillars: Correctness, Completeness, and Compliance. Correctness (A) is correct because it measures whether CI records contain accurate, valid data — for example, checking for duplicate CIs, orphan CIs, and CIs that fail audit or certification checks. Completeness (E) is correct because it measures whether required CI attributes and related records (such as relationships) are populated, flagging CIs with missing mandatory fields. Availability (B), Performance (C), and Scalability (D) are not part of the CMDB Health scoring model; those are operational or infrastructure characteristics, not data-quality pillars of the dashboard.

Answer

Availability

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Performance

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Scalability

Question 10

When configuring Identification Rules in the CI Class Manager, which THREE attributes or criteria types are commonly utilized as unique identifiers? (Choose three.)

Accepted Answer

Serial Number. In the CI Class Manager, Identification Rules use attributes that uniquely distinguish a Configuration Item within its class. Serial Number (A) is a canonical hardware identifier that manufacturers assign uniquely per device, making it a primary choice for identifying physical CIs. IP Address (B) is commonly used as a unique identifier for network devices and interfaces, since it uniquely locates a node on a network at a given time. MAC Address (C) is a globally unique hardware address burned into network interfaces, so it reliably identifies network-capable CIs. Cost Center (D) and Department (E) are organizational or financial attributes that many CIs can share, so they lack the uniqueness required for identification rules and are not used as unique identifiers.

Answer

Cost Center

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Department