DA0-002 Data Governance Practice Question
Network Topology
Refer to the exhibit. What is the impact of the validation result?
⚠ Common exam trap
CompTIA often tests the misconception that matching row counts alone guarantee data completeness, ignoring critical schema mismatches that cause query failures.
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 staging table is missing the 'age' column, which may cause query errors
The validation result shows that the staging table has a different schema than the target table, specifically missing the 'age' column. This mismatch will cause query errors when attempting to insert or query data that references the 'age' column, as the staging table lacks the required column definition. The validation result explicitly flags this schema discrepancy, making option A correct.
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 staging table is missing the 'age' column, which may cause query errors
Why this is correct
Queries expecting the 'age' column will fail in staging.
- ✗
The validation passed successfully
Why it's wrong here
The validation failed due to schema mismatch.
- ✗
Only duplicates were found
Why it's wrong here
No duplicates were found; the issue is schema mismatch.
- ✗
The row counts match, so data is complete
Why it's wrong here
Row count match does not guarantee schema compatibility.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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