BenchMark Quizzes by MDFT Pro

Enable OneLake Availability for Eventhouse

You work for MDFT Pro, a well-known training agency that provides real-time analytics for student performance tracking. Mark, the Real-Time Intelligence Specialist, manages an eventhouse that stores streaming data from online learning platforms, including student quiz results, video watch time, and forum activity.

The eventhouse contains multiple KQL databases with several months of historical data. Recently, the training team requested access to this data through OneLake file explorer so they can analyze it using Fabric lakehouse notebooks and create Power BI reports. However, when they attempt to browse the data through OneLake file explorer, they cannot see any data from the eventhouse. Mark enables OneLake Availability for the eventhouse to make the data accessible.

What data will be copied to OneLake after Mark enables this feature?

Choose the correct answer from the options below.

Explanations for each answer:

Only tables added to new databases are added to the eventhouse is incorrect. Enabling OneLake availability doesn't limit data copying to only new databases. The setting applies to the eventhouse and its existing databases, not just databases created after enabling the feature.
Only the existing tables in the eventhouse is incorrect. OneLake availability is not a one-time copy of existing data. When enabled, it continuously makes data available to OneLake, including both existing data at the time of enabling and any new data that arrives afterward.
No data is incorrect. Enabling OneLake availability specifically makes data accessible in OneLake. If no data were copied, the feature would serve no purpose.
Both new tables and existing tables in the eventhouse is correct. As of 2025, OneLake availability copies new tables added after enabling the feature and also backfills existing tables by default.
Only new tables added to the eventhouse is incorrect. When you enable OneLake availability for an eventhouse, both existing tables and new tables added after enabling the feature are made available in OneLake.

Learn more about Eventhouse OneLake availability:

Eventhouse OneLake Availability

Practice Exam

Enable OneLake Availability for Eventhouse

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