DEA-C02 Data Movement Practice Question
What is the primary purpose of the 'VALIDATION_MODE' parameter in the COPY INTO <table_name> statement?
⚠ Common exam trap
Candidates often confuse VALIDATION_MODE with a dry-run insert that actually tests constraints, when it exclusively parses files and returns errors without loading data.
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
✓
To check the files for errors and return the results without loading the data into the table.
The VALIDATION_MODE parameter allows data engineers to test their COPY commands without actually committing any data to the table. It parses the files and identifies errors, which is a critical step in data movement pipelines to ensure that file formats and mappings are correct before performing a potentially expensive or large-scale ingestion.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
To automatically correct data type mismatches during the load process.
Why it's wrong here
Snowflake does not automatically correct data types during validation. The purpose of this mode is to identify and report errors so that the engineer can manually fix the source data or adjust the load logic, rather than attempting to guess or modify the data values automatically.
- ✓
To check the files for errors and return the results without loading the data into the table.
Why this is correct
This mode is used for 'dry runs'. It scans the staged files and reports any issues (like delimiter problems or type mismatches) that would cause the load to fail. This helps prevent corrupted or partial loads and is a best practice when setting up new data movement tasks.
- ✗
To verify that the person executing the command has the correct IAM permissions on the S3 bucket.
Why it's wrong here
While the command will fail if permissions are missing, VALIDATION_MODE is specifically designed to validate the data structure and content within the files. Standard connectivity and permission checks happen before the validation mode logic even begins to process the file contents.
- ✗
To compare the data in the stage with the data already in the table to find duplicates.
Why it's wrong here
VALIDATION_MODE does not perform deduplication or comparison against existing table data. It only evaluates the files in the stage against the target table's schema and the specified file format rules to ensure the data is 'loadable' from a structural perspective.
About these practice questions
Courseiva writes every DEA-C02 question from scratch — 229 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 September 2026 · checked against the official Snowflake exam blueprint
This DEA-C02 practice question is part of Courseiva's free Snowflake 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 DEA-C02 exam.