PL-300 Deploy and maintain assets — Timed 15 Questions

Question 1

Your Power BI dataset uses DirectQuery to an Azure SQL Database. Users complain that the report is slow. You need to improve query performance without changing the data source. What should you do?

Accepted Answer

Reduce the number of columns and rows retrieved by the report visuals.. Reducing the number of columns and rows retrieved by report visuals directly minimizes the amount of data sent from Azure SQL Database to Power BI via DirectQuery. Since DirectQuery sends native queries to the source for each visual interaction, fewer columns and rows mean smaller, faster queries, which reduces overall latency without altering the underlying data source.

Answer

Add more visuals to the report to distribute the load.

Answer

Increase the scheduled refresh frequency.

Question 2

You have a Power BI dataset that is refreshed every hour from an on-premises data source using an enterprise gateway. The refresh consistently fails at 2:00 AM. What is the most likely cause?

Accepted Answer

The on-premises data gateway is scheduled to reboot at 2:00 AM.. The consistent failure at exactly 2:00 AM strongly points to a scheduled event on the on-premises data gateway, such as a reboot or maintenance window. Enterprise gateways can be configured to reboot periodically for updates or health reasons, and if this coincides with the refresh schedule, the gateway will be unavailable, causing the refresh to fail. Transient errors or cloud maintenance would not produce a perfectly consistent daily failure at the same time.

Answer

The refresh is failing due to a transient network error.

Answer

The data source is undergoing maintenance in the cloud.

Answer

The scheduled refresh time conflicts with another refresh.

Question 3

Which TWO actions should you take to ensure that a Power BI report deployed to production is available to users even if the gateway is offline for maintenance?

Accepted Answer

Create a separate dataset in the cloud that caches the data.. Creating a separate dataset in the cloud that caches the data (e.g., using a scheduled dataflow or a cloud-based dataset with Import mode) ensures that the report can still serve cached data from the Power BI service even when the on-premises gateway is offline for maintenance. This decouples report availability from gateway connectivity, as long as the cached data is refreshed before the maintenance window.

Answer

Create a Power BI Premium capacity to ensure high availability.

Answer

Schedule the dataset refresh to run during the maintenance window.

Answer

Use DirectQuery instead of Import mode to avoid gateway dependency.

Question 4

Which THREE steps should you perform to deploy a Power BI solution from development to production using deployment pipelines?

Accepted Answer

Set up deployment pipeline rules to modify parameters (e.g., database name).. Deployment pipeline rules allow you to modify dataset parameters (e.g., database server or database name) when content moves between pipeline stages, ensuring each stage connects to the appropriate data source without manual reconfiguration. This is a core feature of Power BI deployment pipelines to maintain environment-specific settings.

Answer

Create a new workspace manually in production.

Answer

Assign Power BI Pro licenses to all developers.

Question 5

You review the dataset refresh history. The second refresh took 30 minutes and failed. What is the most likely reason for the failure?

Accepted Answer

The refresh exceeded the timeout limit set in the gateway.. The second refresh took 30 minutes and failed, which strongly indicates the refresh exceeded the default 30-minute timeout limit configured in the on-premises data gateway. When a dataset refresh operation in Power BI runs longer than the gateway's timeout setting, the gateway terminates the connection, causing the refresh to fail. This is a common issue when refreshing large datasets or complex queries through a gateway.

Answer

The refresh schedule conflicted with another refresh.

Answer

The on-premises data gateway was offline.

Answer

The data source was unavailable.

Question 6

You are troubleshooting connectivity to a Power BI Premium dataset via the XMLA endpoint. A user reports that they cannot connect using SQL Server Management Studio (SSMS) but can view reports in the Power BI service. The user's email is user3@contoso.com. What is the most likely cause?

Accepted Answer

The user is not in the allowedUsers list for the XMLA endpoint.. The XMLA endpoint for Power BI Premium datasets requires explicit user membership in the allowedUsers list (or allowedGroups) to enable client tools like SSMS to connect. The user can view reports in the Power BI service, which uses a different permission model (workspace roles), but SSMS connectivity via XMLA is gated by this separate list. Since the user is not in the allowedUsers list, the connection fails even though they have report viewing access.

Answer

External connections are blocked by the configuration.

Answer

The user does not have permission to view reports.

Answer

The XMLA endpoint is disabled.

Question 7

You deploy a Power BI app to a workspace with an app-only license (Premium Per User). Users report that they can access the app but cannot see any visuals in the reports. The dataset uses Import mode. What is the most likely issue?

Accepted Answer

The users do not have a Premium Per User license assigned.. The workspace uses a Premium Per User (PPU) license, which requires each user accessing content in that workspace to have a PPU license assigned. Without it, users can see the app in the list but cannot render visuals because the dataset (Import mode) is processed on PPU-capacity nodes that enforce license checks. This is the most likely cause given the symptom of empty visuals.

Answer

The report uses DirectQuery and the data source is offline.

Answer

The report is published to a shared dataset that has been deleted.

Answer

The dataset has row-level security (RLS) that filters all rows for these users.

Question 8

You manage a Power BI deployment that uses deployment pipelines. After promoting content from Development to Test, you notice that the Test workspace dataset uses a different data source than expected. What is the most likely reason?

Accepted Answer

The dataset parameters were not configured in the deployment pipeline rules.. Deployment pipeline rules allow you to configure dataset parameters (such as data source paths) to differ between pipeline stages. If these rules are not set, the dataset retains the data source configuration from the source stage (Development), causing the Test workspace to use an unexpected data source. The pipeline deploys the dataset artifact, but without parameter overrides, the data source connection string remains unchanged.

Answer

The pipeline didn't deploy the dataset because it was already in Test.

Answer

The data source credentials were not applied during deployment.

Answer

The Test workspace has a separate dataset that was manually created.

Question 9

Which THREE factors should you consider when planning the deployment of Power BI content to a large enterprise with multiple regions?

Accepted Answer

Data residency requirements for each region.. Data residency requirements are critical because Power BI stores data in specific Azure regions. For a multi-region enterprise, you must ensure that data does not leave the required geographic boundary due to compliance or legal mandates. This affects where you provision Power BI tenants, capacity, and data sources.

Answer

The number of visuals per report page.

Answer

The currency format used in reports for each region.

Question 10

A company publishes a Power BI dataset to the service. They need to ensure that when the underlying data source is updated, the dataset refreshes automatically within 30 minutes. The data source is an on-premises SQL Server database. Which component must be configured to enable this automatic refresh?

Accepted Answer

Install and configure an on-premises data gateway. To enable automatic refresh of a Power BI dataset from an on-premises SQL Server database, you must install and configure an on-premises data gateway. The gateway acts as a secure bridge, allowing the Power BI service to connect to on-premises data sources and execute scheduled refreshes. Without it, the cloud service cannot directly access the local database.

Answer

Publish the dataset with incremental refresh enabled

Answer

Change the dataset storage mode to DirectQuery

Answer

Enable the XMLA endpoint for the workspace

Question 11

A Power BI administrator reviews the JSON configuration for a dataset named SalesDataset. The dataset is deployed to a Premium capacity workspace. The data source is an on-premises SQL Server. The administrator notices that the dataset has never refreshed successfully. Based on the exhibit, what is the most likely cause of the refresh failure?

Accepted Answer

The dataset's defaultMode is set to Push, which does not support scheduled refresh. When a dataset's defaultMode is set to 'Push', it is designed to receive data only via the Push API and does not support scheduled refresh. Since the dataset has never refreshed successfully and the JSON configuration shows defaultMode as Push, the scheduled refresh will always fail regardless of the gateway or data source configuration.

Answer

The refresh schedule specifies a frequency of Weekly, but the time is in UTC and not adjusted for the local time zone

Answer

The dataset uses Integrated Security in the connection string, which is not supported for scheduled refresh

Answer

The dataset is in a Premium capacity workspace, which does not support scheduled refresh for on-premises data sources

Question 12

Drag and drop the steps to create a measure in Power BI Desktop into the correct order.

Accepted Answer

Step 1: Open the Modeling tab, Step 2: Click New Measure, Step 3: Write the DAX formula, Step 4: Use the measure in a visual.. Measures are created in the Modeling tab, require a DAX formula that calculates aggregations, and are then used in visuals.

Answer

Step 1: Write the DAX formula, Step 2: Open the Modeling tab, Step 3: Click New Measure, Step 4: Use the measure in a visual.

Answer

Step 1: Open the Modeling tab, Step 2: Write the DAX formula, Step 3: Click New Measure, Step 4: Use the measure in a visual.

Answer

Step 1: Use the measure in a visual, Step 2: Open the Modeling tab, Step 3: Click New Measure, Step 4: Write the DAX formula.

Question 13

Match each Power BI license type to its description.

Accepted Answer

Power BI Free: Allows users to create reports and dashboards for personal use only. Cannot share with others.. Power BI Free is for personal use only, Power BI Pro enables sharing and collaboration, Power BI Premium Per User adds advanced features per user, and Power BI Premium provides dedicated capacity. Common confusions include mixing the sharing capabilities of Pro with Premium Per User and the personal limitation of Free with Premium.

Answer

Power BI Premium Per User: Enables collaboration, sharing, and publishing content with other Pro users.

Answer

Power BI Premium: Allows users to create reports and dashboards for personal use only.

Question 14

Match each data source type to an example.

Accepted Answer

Relational Database: SQL Server database. The correct matches are: Relational Database → SQL Server, Flat File → CSV, Excel Workbook → Excel file, Web Service → REST API. Common confusions include associating flat files with Excel (which is a workbook) or relational databases with CSV (which is a flat file).

Answer

Relational Database: CSV file

Answer

Flat File: Excel file

Question 15

You manage a Power BI workspace that contains a dataset refreshed daily from an on-premises SQL Server. Users report that the report shows data from two days ago. You verify that the scheduled refresh ran successfully this morning. What is the most likely cause?

Accepted Answer

The on-premises data source is misconfigured, causing the refresh to load data from an outdated source.. The most likely cause is that the on-premises data source is misconfigured (e.g., pointing to a stale backup or snapshot). This results in the scheduled refresh loading data from an outdated source, making it appear successful yet yielding old data. The gateway does not cache data; the issue lies in the data source reference.

Answer

The refresh took longer than expected and timed out.

Answer

The scheduled refresh is not set to refresh the dataset.

Answer

The on-premises data gateway is offline.