SNOW-CAD Working with Data Practice Question
A company is importing data from a CSV into the 'cmdb_ci' table using an Import Set Row transform map. After running the import, some records were not created. The transform map has a 'Coalese' field set to true on the 'name' field. What is the most likely reason for records not being created?
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 'Coalese' field is set to true on the 'name' field, so existing records are updated instead of new ones created.
Coalese=true on name means if a record with the same name exists, it will update instead of insert. If the name matches an existing record, no new record is created. Option A is wrong because missing fields trigger errors, not silent failure. Option C is wrong because field mapping issues cause different problems. Option D is wrong because coalesce is for matching, not data type.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The transform map has incorrect field mappings for the CSV columns.
Why it's wrong here
Incorrect mappings would cause data not to populate but would still create records if coalesce doesn't match.
- ✓
The 'Coalese' field is set to true on the 'name' field, so existing records are updated instead of new ones created.
Why this is correct
Coalesce uses the field to match existing records; if matched, it updates rather than inserts.
- ✗
The target table has a data policy that prevents insert from import sets.
Why it's wrong here
Data policies do not prevent inserts from import sets by default.
- ✗
The CSV file has missing fields that are mandatory on the target table.
Why it's wrong here
Missing mandatory fields would likely cause an error or skip the record with a log.
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Same concept, more angles
2 more ways this is tested on SNOW-CAD
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A company needs to import data from a CSV file into a custom table. The import should update existing records if a unique identifier matches, and insert new records if no match is found. Which feature should be configured on the transform map to achieve this?
easy- ✓ A.Coalesce
- B.Scheduled import
- C.Field mapping
- D.Data source
Why A: The Coalesce feature on a transform map determines which field(s) are used to match incoming records against existing records in the target table. When a match is found, the transform map updates the existing record; when no match is found, it inserts a new record. This directly enables the required upsert behavior.
Variation 2. A company is importing user records from a CSV file using an import set. The transform map is configured to update existing records and insert new ones based on the email field. After running the import, they notice that some existing records were not updated even though the email matched. The email field in the target user table is correctly populated and has a unique index. The source CSV file has no obvious formatting issues. The import set runs without errors. What is the most likely cause?
easy- ✓ A.The transform map's 'Coalesce' checkbox is not selected on the email field mapping.
- B.The source CSV has trailing spaces in the email field.
- C.The email field in the target table is not indexed.
- D.The import set table does not have a unique index on the email field.
Why A: The most likely cause is that the 'Coalesce' checkbox is not selected on the email field mapping in the transform map. Coalesce must be enabled for the system to use that field to match existing records in the target table. Without coalesce, the system treats all incoming records as new, so updates will not occur even if the email matches. Option B is incorrect because trailing spaces would affect all matching, not just some records, and the scenario states no formatting issues. Option C is incorrect because indexing affects performance, not matching. Option D is incorrect because the import set table does not need a unique index for target matching; the matching is based on the target table's email field, which has a unique index.
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This SNOW-CAD 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 SNOW-CAD exam.