The answer is to create a synchronous plug-in on the Update message of the Project table. This is correct because client-side business rules only fire within the model-driven app form, but Power Automate flows bypass the form entirely and update the data directly in the database. A synchronous plug-in runs immediately within the same database transaction, so it enforces the business rule—checking that End Date is not blank when Status is ‘Completed’—no matter how the update arrives. On the PL-900 exam, this question tests your understanding of the difference between client-side logic (business rules, JavaScript) and server-side logic (plug-ins, real-time workflows). A common trap is thinking a business rule will apply everywhere, but remember: forms are just windows into the data, not the data itself. Memory tip: “Forms are for faces, plug-ins are for places”—client logic works where you see it, server logic works wherever the data lives.
PL-900 Demonstrate the capabilities of Power Apps Practice Question
This PL-900 practice question tests your understanding of demonstrate the capabilities of power apps. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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.
A company deploys a model-driven app that uses a custom table 'Project' with a status choice column. The app includes a business rule that shows a warning message when the status is set to 'Completed' but the 'End Date' is blank. The business rule works on the main form but not when records are updated via a Power Automate flow. Which THREE actions should the administrator take to enforce the rule regardless of update method?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use a synchronous plug-in that runs on the Update message of the Project table.
Option A is correct because a synchronous plug-in runs on the Update message of the Project table, executing immediately within the database transaction. This ensures the validation logic (checking that End Date is not blank when Status is 'Completed') is enforced regardless of the update method, including Power Automate flows, which bypass client-side business rules.
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.
✓
Use a synchronous plug-in that runs on the Update message of the Project table.
Why this is correct
Synchronous plug-ins run on the server and can enforce validation.
Related concept
Read the scenario before looking for a memorised answer.
✓
Add a custom API step in the Power Automate flow to validate the End Date before updating.
Why this is correct
A custom step can enforce validation in the flow.
Related concept
Read the scenario before looking for a memorised answer.
✗
Configure an asynchronous workflow that runs after the update.
Why it's wrong here
Async workflows may not run immediately and cannot prevent the update.
✓
Create a real-time workflow on the Project table to validate on update.
Why this is correct
Real-time workflows run on the server and apply to all updates.
Related concept
Read the scenario before looking for a memorised answer.
✗
Modify the business rule to run on all forms.
Why it's wrong here
Business rules only run on forms, not on server-side updates.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume business rules apply to all update methods, but they are client-side only and do not execute during server-side operations like Power Automate flows or API calls.
Detailed technical explanation
How to think about this question
Business rules in model-driven apps are evaluated on the client side (within the form context) and do not trigger during server-side operations such as Power Automate flows, web API calls, or bulk updates. Synchronous plug-ins, on the other hand, execute within the Dynamics 365 event pipeline on the Update message, allowing validation to occur before the data is persisted, and they can throw errors to block the operation. Real-time workflows (Option D) also run synchronously on the server and can enforce validation, making them a valid alternative to plug-ins for this scenario.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
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.
Demonstrate the capabilities of Power Apps — This question tests Demonstrate the capabilities of Power Apps — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use a synchronous plug-in that runs on the Update message of the Project table. — Option A is correct because a synchronous plug-in runs on the Update message of the Project table, executing immediately within the database transaction. This ensures the validation logic (checking that End Date is not blank when Status is 'Completed') is enforced regardless of the update method, including Power Automate flows, which bypass client-side business rules.
What should I do if I get this PL-900 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.
About these practice questions
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Variation 1. A company has a model-driven app with a custom table 'Issue' that has a choice column 'Status' with values: New, In Progress, Resolved, Closed. The app uses a business rule to set 'Resolved By' (lookup to User) when status changes to Resolved. Users report that the 'Resolved By' field is not being populated. What is the most likely cause?
medium
A.The 'Resolved By' lookup column is not added to the form.
B.The 'Resolved By' column is required and users don't fill it.
✓ C.The business rule is scoped to the form but the status change happens via a quick create form.
D.The business rule is deactivated.
Why C: Business rules in model-driven apps can be scoped to either the entity (all forms) or a specific form. If the rule is scoped to a particular form (e.g., the main form) but the status change occurs via a quick create form, the rule will not trigger. This is the most likely cause because users report the field is not populated, indicating the rule is not firing in the context where the status is being changed.
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Question Discussion
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