CIS-DF Ingest Practice Question
An organization is migrating from a legacy configuration management database to ServiceNow. They load initial server records using custom import sets without the IRE. Later, they enable ServiceNow Discovery. They notice that every discovered server creates a duplicate CI right alongside the imported record. What caused this duplicate creation?
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
✓
The legacy import bypassed the IRE, failing to populate the sys_object_source tracking table with the correct native keys and discovery source identifiers.
Records ingested without the IRE lack the proper sys_object_source tracking and native identifier linkage expected by Discovery and the IRE, resulting in failure to recognize existing records.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Discovery is hardcoded to ignore any records created by Transform Maps.
Why it's wrong here
Discovery does not ignore records based on creation method; it relies on IRE matching logic and identification rules.
- ✗
The cmdb_ci table has a business rule that forces duplicate insertion for security purposes.
Why it's wrong here
ServiceNow does not enforce duplicate insertion via security business rules on the base CI table.
- ✓
The legacy import bypassed the IRE, failing to populate the sys_object_source tracking table with the correct native keys and discovery source identifiers.
Why this is correct
Without sys_object_source entries and proper IRE matching during initial load, Discovery cannot link incoming payload identifiers to the legacy records.
- ✗
Data Source Precedence rules were not set to 'Manual' before running Discovery.
Why it's wrong here
Precedence rules dictate attribute overwriting, not initial CI identification matching.
About these practice questions
Courseiva writes every CIS-DF question from scratch — 322 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
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.