Question 460
A company queries archived Delta files from Eventhouse without copying them. The current environment exhibits the following problem: a data steward expects all archived rows to be cached indefinitely. What should the administrator implement or verify?
Explanation
Correct Answer
Select a bounded acceleration cache period based on data freshness and cost. Query acceleration retains eligible cached data only for configured windows.
Incorrect Answers
Repeated external scans are too slow for low-latency KQL joins. Acceleration caches suitable external Delta data for faster KQL reads.
Archived dimension data should be accessed through Eventhouse directly from OneLake. External query paths can read referenced Delta storage.
An engineer assumes query acceleration converts external Delta into a native mutable table. Acceleration doesn't confer native ingestion or update-policy semantics.