CIS-DF Ingest Practice Question
An administrator is configuring a new Import Set to ingest third-party server data into the cmdb_ci_server table. During testing, they notice that records are being inserted as duplicates rather than updating existing CIs because the incoming payload lacks a unique identifier match. Which component should be configured to ensure the Identification and Reconciliation Engine (IRE) correctly identifies the existing CI?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure an Identification Rule in CI Class Manager for cmdb_ci_server.
Identification Rules are used by the IRE to determine if an incoming payload matches an existing CI in the CMDB, preventing duplicates.
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 an Identification Rule in CI Class Manager for cmdb_ci_server.
Why this is correct
Identification Rules define the criteria the IRE uses to match incoming records to existing CIs.
- ✗
Modify the coalesce setting on the Transform Map to use serial number.
Why it's wrong here
Using standard Transform Map coalesce bypasses the IRE, which is a bad practice in the CSDM and CMDB framework.
- ✗
Enable 'Robust Transform Engine' on the data source properties.
Why it's wrong here
While RTE can process data, it still requires IRE rules to be configured properly to avoid duplicates.
- ✗
Create a Data Source Precedence rule for the import set.
Why it's wrong here
Data Source Precedence dictates which discovery source wins attributes, not how records are matched during identification.
About these practice questions
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official ServiceNow exam blueprint
This CIS-DF practice question is part of Courseiva's free ServiceNow certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CIS-DF exam.