CIS-DF Ingest Practice Test 4 — 15 Questions

Question 1

An organization is preparing to ingest data from an external asset tracking system into the ServiceNow CMDB using a custom REST API integration. Which THREE architectural components must be considered to ensure data integrity and prevent duplication? (Choose three.)

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

Establishing and verifying CI identification rules in CI Class Manager for all target classes.. Option A is correct because CI identification rules defined in CI Class Manager determine which attributes (e.g., serial number, name, IP address) uniquely identify a CI within each class; without verified, class-specific identification rules, incoming records cannot be reliably matched to existing CIs and duplicates will proliferate. Option C is correct because the Identification and Reconciliation Engine (IRE) is the ServiceNow mechanism that applies those identification rules, reconciles duplicates, and enforces data-source precedence; bypassing it with direct GlideRecord inserts into cmdb_ci tables skips deduplication and reconciliation entirely. Option E is correct because every payload must carry a consistent, standardized discovery source value so IRE can apply the correct data source precedence and track record provenance; inconsistent or missing discovery source strings cause IRE to treat records as unrelated and create duplicates. Option B is not correct because Client Scripts run in the browser on form load/change/submit and have no role in validating inbound REST payloads; server-side validation belongs in Scripted REST APIs, business rules, or IRE data source rules. Option D is not correct because Cascade Delete on reference fields controls deletion behavior of related records and does nothing to ensure data integrity or prevent duplication during ingestion; in fact, it can cause unintended mass deletions of related CIs.

Answer

Writing custom Client Scripts to validate JSON payloads on form load.

Answer

Enabling 'Cascade Delete' on all reference fields in the target CMDB tables.

Question 2

When configuring Identification Rules in CI Class Manager, administrators can specify multiple criteria entries. Which TWO behaviors apply when multiple identification rule entries are defined for a single class? (Choose two.)

Accepted Answer

The IRE evaluates the identification rule entries in sequential order based on their priority ranking.. Option B is correct because the Identification and Reconciliation Engine (IRE) processes multiple identification rule entries in a defined sequence governed by their priority ranking, so administrators control which criteria are attempted first. Option E is correct because identification entries act as a fallback chain: when the first entry's criteria do not match any existing CI, the IRE proceeds to evaluate the next entry until a match is found or all entries are exhausted. Options A, C, and D are incorrect: the IRE does not automatically merge all matching records into one (A), identification rules are not limited to legacy Import Sets and apply to all IRE-based ingestion sources (C), and entries are evaluated sequentially rather than requiring all criteria to match at once (D).

Answer

Defining multiple entries automatically merges all matching records into a single record.

Answer

Identification rule entries only apply when ingestion is performed via legacy Import Sets.

Answer

All identification rule entries must match simultaneously for a CI to be identified.

Question 3

An administrator is reviewing Discovery results and notices that network switches are successfully discovered, but their associated switch ports are missing. Which TWO factors are most likely responsible for this ingestion gap? (Choose two.)

Accepted Answer

The dependent relationship payload structure for switch ports failed IRE validation or was omitted.. Option A is correct because switch ports are ingested as dependent CI records tied to the parent switch via the IRE (Identification and Reconciliation Engine); if the dependent relationship payload is malformed, fails IRE validation, or is omitted entirely, the parent switch is created but its port CIs are dropped. Option D is correct because the discovery pattern (e.g., the SNMP-based network switch pattern) is what parses and populates the switch port table; if that port-parsing step is removed or excluded from the pattern, switches still get discovered while ports never get created. Option B is not relevant because cmdb_ci_ip_address read-only access affects IP address CI writes, not switch port ingestion. Option C is not relevant because Data Source Precedence rules resolve conflicts between data sources for existing records; they do not cause ports to be marked deprecated or prevent their initial discovery. Option E is not relevant because running discovery outside business hours only affects timing, not whether switch port data is parsed and ingested.

Answer

The cmdb_ci_ip_address table has read-only access enabled for all users.

Answer

Data Source Precedence rules marked switch ports as deprecated.

Answer

Discovery schedules were run outside of business hours.

Question 4

An administrator is configuring Data Source Precedence rules to manage attribute updates from multiple integrations. Which THREE of the following statements about Data Source Precedence are accurate? (Choose three.)

Accepted Answer

Precedence rules can be configured to allow specific data sources to update designated attributes while blocking others.. Option B is correct because Data Source Precedence rules are designed to control which data sources are authorized to update specific attributes on a record, so an administrator can permit one integration to write certain fields while preventing others from overwriting them. Option D is correct because precedence rules defined on a parent class are inherited by child classes through the class hierarchy, unless the child class has its own explicitly defined rule that overrides the inherited behavior. Option E is correct because when no attribute-level precedence rule exists, the Identification and Reconciliation Engine (IRE) applies its default precedence logic rather than blocking the update outright. Option A is incorrect because Data Source Precedence rules are configured in the Data Source Precedence module/table (e.g., sys_data_source_precedence), not in the System Log (syslog) table, which records system events. Option C is incorrect because legacy transform maps that bypass the IRE do not automatically honor Data Source Precedence rules; those rules are enforced through the IRE reconciliation process.

Answer

Data Source Precedence rules are managed directly within the System Log table.

Answer

Precedence rules automatically apply to legacy transform maps that do not use the IRE.

Question 5

An organization is troubleshooting duplicate CIs appearing in the CMDB after running a new integration. Which TWO administrative actions should be taken to investigate and resolve this issue? (Choose two.)

Accepted Answer

Inspect CI Class Manager identification rules for the affected class to ensure unique attributes are correctly defined.. Option A is correct because CI Class Manager identification rules define which attributes (such as serial number, name, or IP address) are used to uniquely identify a CI; if these rules are misconfigured or missing for the affected class, incoming records will not match existing CIs and duplicates will be created. Option D is correct because the Identification and Reconciliation Engine (IRE) processing logs and payload results show exactly how each incoming record was evaluated, including which identification rules were applied and why a match failed, which is essential for diagnosing the root cause of duplicate CIs. Option B is incorrect because hiding duplicates via ACLs only masks the symptom and does not resolve the underlying identification problem. Option C is incorrect because REST Message timeout limits affect outbound request performance, not CI matching or deduplication. Option E is incorrect because deleting and recreating Discovery schedules is a destructive, unrelated action that would not address duplicate CI creation from an integration.

Answer

Modify Access Control Lists to hide duplicate CIs from users.

Answer

Increase the timeout limit on all REST Message records.

Answer

Delete all Discovery schedules and recreate them from scratch.

Question 6

An administrator is configuring a Service Graph Connector. They notice that the integration is failing because the inbound payload uses a custom field name for the serial number instead of the standard IRE attribute name `serial_number`. How should this mapping discrepancy be resolved without altering the external source system?

Accepted Answer

Configure an RTE field mapping to translate the custom source field name to the standard `serial_number` attribute expected by the IRE payload.. RTE field mappings are designed to translate source field names to target IRE payload attributes. By configuring an RTE field mapping, the custom source field name is mapped to the standard `serial_number` attribute expected by the IRE, allowing the integration to succeed without modifying the external system. This is the intended use of RTE's mapping layer.

Answer

Modify the target CI table dictionary to rename the `serial_number` column to match the external system's custom field name.

Answer

Create a Business Rule on the staging table to drop the custom field.

Answer

Update the CI Class Manager identification rule to use the custom field name.

Question 7

Which ServiceNow module provides a centralized dashboard view of CMDB data quality metrics, including completeness, correctness, and compliance?

Accepted Answer

CMDB Health Dashboard. The CMDB Health Dashboard provides health calculations across completeness, correctness, and compliance.

Answer

Transform Map Metrics

Answer

Discovery Status Dashboard

Answer

Service Mapping Workbench

Question 8

An administrator is configuring an IntegrationHub Spoke to ingest data from an external monitoring tool into the CMDB. The integration uses the IRE to process payloads. When testing the action, the payload returns an error stating that the payload is missing the mandatory 'className' property. How should the administrator correct this?

Accepted Answer

Ensure the JSON payload structure includes the `className` parameter for each CI object, specifying the exact target table name (e.g., `cmdb_ci_linux_server`).. IRE payloads require a valid `className` property for each CI object to identify which CMDB table the record belongs to.

Answer

Add a Transform Map to the IntegrationHub action.

Answer

Modify the table name in the Data Source record.

Answer

Configure a Data Policy on the REST Message form.

Question 9

An organization ingests data from two different cloud providers into the CMDB. Provider A populates virtual machines with a serial number, while Provider B populates virtual machines with a BIOS UUID but no serial number. Both providers use the same identification rule which requires serial number. Consequently, Provider B records fail identification and create duplicates. How should the identification rules be configured to correctly handle both providers?

Accepted Answer

Configure multiple identification rule entries in CI Class Manager: Entry 1 using serial number, and Entry 2 using BIOS UUID.. The correct approach is to configure multiple identification rule entries in CI Class Manager, each with a different identifier attribute (serial number for Provider A, BIOS UUID for Provider B). The IRE evaluates entries in order and uses the first one that matches, so Provider B records will be identified by BIOS UUID even if serial number is missing. This ensures both providers' data are correctly identified without creating duplicates.

Answer

Disable identification rules and rely on legacy transform map coalescing.

Answer

Create a Business Rule to copy the BIOS UUID into the serial number field before ingestion.

Answer

Combine serial number and BIOS UUID into a single compound identification rule entry with an AND operator.

Question 10

An administrator is setting up an import using Robust Transform Engine (RTE). They need to ensure that incoming records are only processed if a specific status field equals 'Active'. Where should this conditional filtering be configured within RTE?

Accepted Answer

Configure data stream filters or conditional field processors within the Robust Transform Engine definition.. In RTE, conditional filtering to process only records with a specific status (e.g., 'Active') is configured using data stream filters or conditional field processors within the RTE definition. These allow administrators to define conditions that records must meet to be processed further.

Answer

Write an On-Load Client Script on the staging table.

Answer

Modify the identification rule criteria to ignore inactive records.

Answer

Set the Coalesce checkbox on the Transform Map to 'Active'.

Question 11

Which role is typically required to configure Identification Rules and Data Source Precedence rules in the CI Class Manager?

Accepted Answer

cmdb_admin or admin. Admin or cmdb_admin role is required to modify CMDB class definitions and identification rules.

Answer

discovery_admin only

Answer

asset

Answer

itil

Question 12

An enterprise has implemented strict identification rules requiring serial numbers for all hardware. However, a batch of legacy network hubs has no serial numbers encoded in firmware. When ingested via import sets, the IRE rejects every record due to missing identification attributes. The business wants these records ingested into the CMDB anyway, using their MAC address as the unique identifier. What is the correct way to accommodate this?

Accepted Answer

Add a second identification rule entry for the hardware class in CI Class Manager where the identification criteria uses MAC address.. Adding a secondary identification rule entry using MAC address allows devices without serial numbers to be correctly identified and ingested.

Answer

Change the target table to cmdb_ci_appl.

Answer

Disable the identification rule entirely for the hardware class.

Answer

Write a Business Rule to insert fake serial numbers starting with 'UNKNOWN' into every record.

Question 13

An administrator is troubleshooting an integration where an incoming JSON payload contains relationships between servers and IP addresses. The server is created successfully, but the relationship record in `cmdb_rel_ci` is missing. Upon checking the IRE execution log, the system indicates that the relationship type string was invalid. How should this be resolved?

Accepted Answer

Ensure the relationship type specified in the payload matches an active parent/child relationship name defined in the `cmdb_rel_type` table.. Relationship types specified in payloads must match active record values in the `cmdb_rel_type` table.

Answer

Disable relationship validation in CMDB properties.

Answer

Create a Transform Map to map relationship types.

Answer

Modify the cmdb_rel_ci table dictionary to allow free-text relationship types.

Question 14

When configuring a Service Graph Connector, where does an administrator typically test and execute the data ingestion process to verify that source data maps correctly to staging tables and the CMDB?

Accepted Answer

Data Sources module -> Select the Data Source -> Click 'Test Load 20 Records' or 'Execute Now'. In ServiceNow, after configuring a Service Graph Connector, the data ingestion process is tested and executed from the Data Sources module. Selecting the relevant Data Source and clicking 'Test Load 20 Records' or 'Execute Now' allows the administrator to verify that source data maps correctly to staging tables and the CMDB. This is the standard testing procedure.

Answer

Discovery Status -> Run Quick Discovery

Answer

Service Mapping Workbench -> Test Map

Answer

CI Class Manager -> Test Ingestion

Question 15

An organization uses ServiceNow Discovery to populate servers. They also have a security vulnerability scanner that ingests vulnerability records and associates them with CIs in the CMDB. The security tool frequently sends payloads containing stale IP addresses that match existing CIs incorrectly because the IP reuse policy in their network causes IP addresses to cycle rapidly. How can the administrator prevent the security tool from using IP address as an identification criterion while still allowing it to update vulnerability attributes?

Accepted Answer

Review and refine the identification rules for the server class to remove volatile attributes like IP address, ensuring identification relies on stable unique keys like serial number or system ID.. The administrator should refine the identification rules for the server class to remove volatile attributes like IP address. By ensuring identification relies on stable unique keys such as serial number or system ID, the security tool can still update vulnerability attributes without incorrectly matching CIs based on IP.

Answer

Configure Data Source Precedence to block the security tool from updating IP addresses.

Answer

Write a Business Rule on cmdb_ci to delete IP records when IP churn occurs.

Answer

Set the security tool's discovery source to 'Manual'.