PL-900 Practice Question: Describe the business value of Microsoft Power Platform
A company uses Power Apps for a field service app. They notice that the app loads slowly when users access it on mobile devices. What is the most likely cause?
⚠ Common exam trap
Watch out — candidates often confuse server-side latency (e.g., Dataverse region) with client-side resource loading, assuming any performance issue must be related to data or authentication rather than the app's static assets.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The app contains large images that are not optimized
Large, unoptimized images increase the payload size that must be downloaded to the mobile device, directly impacting load times, especially over cellular networks. Power Apps loads all resources, including images, when the app starts, so oversized images cause significant delays. Optimizing images (e.g., compressing, resizing, using modern formats like WebP) reduces bandwidth usage and speeds up app loading.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The app has too many Power Automate flows
Why it's wrong here
Power Automate flows run server-side on trigger events and are not loaded into the app's client bundle, so their count does not affect mobile startup time. Flow volume matters for automation throughput limits, not canvas app rendering performance on a device.
- ✗
The Dataverse environment is in a different region
Why it's wrong here
Dataverse region placement affects data residency and cross-region latency for queries, but a field service app's slow mobile load stems from client-side rendering of controls and data calls. Region selection is correct when compliance mandates data residency within a geography.
- ✗
The app uses Microsoft Entra ID for authentication
Why it's wrong here
Microsoft Entra ID authentication adds a token exchange at sign-in, which is a one-off latency rather than the recurring slow load on mobile devices. Entra ID is the right choice when centralised identity, conditional access and single sign-on are required.
- ✓
The app contains large images that are not optimized
Why this is correct
Large, unoptimised images inflate the app's payload, so each mobile screen must download and render far more data than necessary over constrained bandwidth. Since the stem's constraint is slow loading specifically on mobile devices, image weight is the dominant factor; desktop connections mask it. Optimising or compressing those assets directly reduces load time.
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