Microsoft DP-600 - Implementing Analytics Solutions Using Microsoft Fabric

The measure should use the AVERAGE function to calculate the average value.

It should reference the Response Value column from the 'Survey' table.

The 'Number of months' should be used to define the period for the average calculation.

To calculate the average overall satisfaction score using DAX, you would need to use the AVERAGE function on the response values related to satisfaction questions. The DATESINPERIOD function will help in calculating the rolling average over the last 12 months.

The PoC is planned to be completed using a Fabric trial capacity, which implies that users involved in the PoC should be able to try paid features. However, this should be limited to specific security groups involved in the PoC to prevent the entire organization from accessing these features before the trial is proven successful (A). The ability for users to create Fabric items should also be enabled for specific security groups to ensure that only the relevant team members participating in the PoC can create items in the Fabric environment (E).

A possible cause for the failure is that query folding is NOT occurring (D). Query folding helps optimize refresh by pushing down the query logic to the source system, reducing the amount of data processed and transferred, hence conserving resources. References = The Power BI documentation on incremental refresh and query folding provides detailed information on this topic.

When saving a semantic model to a file that can be edited using the Tabular Model Scripting Language (TMSL) extension for Visual Studio Code, the PBIX (Power BI Desktop) file format is the correct choice. The PBIX format contains the report, data model, and queries, and is the primary file format for editing in Power BI Desktop. References = Microsoft's documentation on Power BI file formats and Visual Studio Code provides further clarification on the usage of PBIX files.

When using XMLA endpoints to manage and update semantic models in Microsoft Fabric, the performance of write operations (such as processing, structural changes, or metadata deployments from Tabular Editor) is directly influenced by the storage format and how the model is persisted.

Why Option A is Correct

By default, Fabric semantic models use the Small semantic model storage format.

To improve write operations performance through XMLA, you must change the workspace setting to use the Large semantic model storage format.

The large format uses more efficient storage techniques, supports partitioning, and handles larger models with optimized write capabilities.

This setting is applied at the workspace level and impacts all semantic models within that workspace, including Model1.

This is explicitly documented in Microsoft’s guidance: Large semantic model storage format is required when using XMLA write operations for large or frequently updated models.

Why the Other Options Are Incorrect

B. Configure Model1 to use the Direct Lake storage format.

Direct Lake mode is designed for query performance (reading data directly from OneLake in delta format without import/duplication).

It improves query latency and freshness but does not improve XMLA write operations, which deal with model metadata and structural updates.

C. Delete any unused semantic models from Workspace1.

Deleting unused semantic models helps manage capacity and storage but does not increase the speed of XMLA endpoint write operations.

Workspace storage overhead does not directly impact the write throughput of XMLA operations.

D. Delete any unused columns from Model1.

Removing unused columns reduces the memory footprint and can improve query performance.

However, it does not directly improve the speed of XMLA write operations. The bottleneck in XMLA writes is tied to the storage format, not the model size alone.

Summary

To increase the speed of XMLA write operations on semantic models, you must enable the Large semantic model storage format at the workspace level. This setting ensures better handling of writes and metadata operations via the XMLA endpoint.

References

Large models in Power BI and Microsoft Fabric

Use the XMLA endpoint in Microsoft Fabric

Manage capacities in Microsoft Fabric

Before specifying the partition column in the Destination settings of the Copy activity, you should set Mode to Append (A). This will allow the Copy activity to add data to the table while taking the partition column into account. References = The configuration options for Copy activities and partitioning in Azure Data Factory, which are applicable to Fabric dataflows, are outlined in the official Azure Data Factory documentation.