Power BI 778 Performance Optimization and Troubleshooting 2

Question 1

Which free external tool connects to a Power BI model and provides detailed DAX query execution plans and server timing metrics?

Accepted Answer

DAX Studio

Answer

Power BI Report Builder

Answer

SQL Server Management Studio

Answer

Azure Data Studio

Question 2

In DAX Studio's Server Timings pane, what does a disproportionately high Formula Engine (FE) time relative to Storage Engine (SE) time typically indicate?

Accepted Answer

The DAX contains complex iterating logic the storage engine cannot fully handle

Answer

The data source connection is slow

Answer

The report has too many visuals on one page

Answer

The dataset exceeds the Power BI Pro size limit

Question 3

Where in Power BI Desktop can you enable Query Diagnostics to capture the actual native queries sent to your data source?

Accepted Answer

Tools tab in the Power Query Editor

Answer

View ribbon > Performance Analyzer

Answer

Home ribbon > Data Source Settings

Answer

Model view > Manage Relationships

Question 4

What is the primary benefit of creating aggregation tables in a Power BI dataset?

Accepted Answer

They enable faster responses for summary queries by avoiding full scans of detail rows

Answer

They allow users to edit source data from within Power BI

Answer

They eliminate the need for star schema relationships

Answer

They replace the need for DAX measures entirely

Question 5

In the Performance Analyzer results, what does the 'Other' time category typically represent?

Accepted Answer

Visual rendering overhead and framework time beyond DAX or DirectQuery processing

Answer

Network latency to the Power BI Service

Answer

Time for Power Query transformations to run

Answer

Time to publish the report to a workspace

Question 6

Which Power BI 'Dual' storage mode behavior best describes how a table operates at query time?

Accepted Answer

It acts as Import when queried with Import tables and as DirectQuery when queried with DirectQuery tables

Answer

It simultaneously writes data to two storage locations for redundancy

Answer

It duplicates the table as both a fact and a dimension

Answer

It caches DirectQuery results and serves them from cache for one hour

Question 7

Which action is most effective for reducing dataset memory footprint before loading data into Power BI?

Accepted Answer

Removing unnecessary columns and filtering unneeded rows in Power Query

Answer

Increasing the number of calculated columns in the model

Answer

Enabling bidirectional cross-filtering on all relationships

Answer

Converting all measures to calculated columns