Databricks Certified Data Engineer - Professional
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When implementing data quality constraints on a Delta table, how does Delta Lake ensure compliance with these rules?
A
By validating constraints asynchronously during file compaction (the OPTIMIZE command).
B
By checking constraints at query execution time to filter out invalid records from the result set.
C
By rejecting any write operation that contains data violating the specified constraint criteria.
D
By applying constraints retroactively to all existing historical data stored in the transaction log.