The answer is to deploy the Azure Analysis Services model to the same Azure region as the Power BI workspace. This is correct because a live connection sends DAX queries over the XMLA protocol, and when the AAS server and Power BI service are in different regions, every query must traverse significant physical distance and network hops, introducing latency that can cause visuals to take over 30 seconds to render. Co-locating them minimizes this round-trip delay, directly improving query response time without altering the data model or report structure. On the PL-300 exam, this scenario tests your understanding of how network topology impacts live connection performance, often appearing as a distractor where candidates might incorrectly suggest optimizing the model or report. A common trap is focusing on query optimization when the root cause is geographic distance. Memory tip: think “same region, same speed”—if your AAS server and Power BI are in different regions, your live connection will always feel slow.
PL-300 Deploy and maintain assets Practice Question
This PL-300 practice question tests your understanding of deploy and maintain assets. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
You have developed a Power BI report that uses a live connection to an Azure Analysis Services (AAS) model. The AAS model is deployed in a different Azure region. Users report that the report loads slowly, sometimes taking over 30 seconds to render a single visual. You need to improve performance without changing the data model or the report structure. What should you do?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Deploy the Azure Analysis Services model to the same region as the Power BI workspace.
Option C is correct because deploying the Azure Analysis Services model to the same Azure region as the Power BI workspace minimizes network latency between the live connection client (Power BI) and the tabular model server. A live connection sends DAX queries over the XMLA protocol, and cross-region traffic introduces significant round-trip delays, which directly causes slow visual rendering. By co-locating the AAS server and the Power BI service in the same region, you reduce the physical distance and network hops, improving query response time without altering the model or report.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Enable the 'Reduce data shown in visuals' option in Power BI Desktop.
Why it's wrong here
This option limits data displayed but does not reduce the load on the AAS model.
✗
Implement row-level security (RLS) in the Azure Analysis Services model.
Why it's wrong here
RLS filters data but does not improve query performance.
✓
Deploy the Azure Analysis Services model to the same region as the Power BI workspace.
Why this is correct
Reducing network latency between the data source and Power BI improves query response times.
Related concept
Read the scenario before looking for a memorised answer.
✗
Convert the report to import mode and schedule a refresh.
Why it's wrong here
This changes the connection type and may not be desired; also requires a gateway.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse client-side optimization settings (like reducing data shown) with server-side performance fixes, or they incorrectly assume that adding RLS or switching to import mode are acceptable solutions when the question explicitly prohibits changing the data model or report structure.
Detailed technical explanation
How to think about this question
A live connection to Azure Analysis Services uses the XMLA over HTTPS protocol, where each visual sends a separate DAX query to the server. Cross-region network latency can add 50–200 ms per query round trip, and a single report page may issue dozens of queries, accumulating to 30+ seconds of delay. Co-locating the AAS server and Power BI workspace in the same Azure region ensures that queries traverse the Microsoft backbone network with minimal latency (typically <5 ms), dramatically improving perceived performance. Additionally, enabling the 'Reduce data shown in visuals' option (Option A) only truncates the result set after the query completes, so it does not reduce the query execution time or network transfer overhead.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Deploy and maintain assets — This question tests Deploy and maintain assets — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Deploy the Azure Analysis Services model to the same region as the Power BI workspace. — Option C is correct because deploying the Azure Analysis Services model to the same Azure region as the Power BI workspace minimizes network latency between the live connection client (Power BI) and the tabular model server. A live connection sends DAX queries over the XMLA protocol, and cross-region traffic introduces significant round-trip delays, which directly causes slow visual rendering. By co-locating the AAS server and the Power BI service in the same region, you reduce the physical distance and network hops, improving query response time without altering the model or report.
What should I do if I get this PL-300 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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