The correct answer is that the relationship between Warehouse and Warehouse Items is not configured correctly or is missing. A subgrid in a model-driven app relies entirely on an existing relationship between the parent entity (Warehouse) and the child entity (Warehouse Items) to filter and display related records; without that relationship defined in the data model, the subgrid has no way to know which items belong to which warehouse, so it remains empty even if data exists. On the Microsoft Power Platform Fundamentals PL-900 exam, this tests your understanding of how subgrids depend on entity relationships rather than security roles or form fields—a common trap is confusing visibility issues with missing relationships. Remember the memory tip: “No relationship, no subgrid data.”
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 model-driven app for inventory management uses a custom entity 'Warehouse'. The app maker added a subgrid showing 'Warehouse Items' related to the selected warehouse. However, the subgrid does not show any data even though there are items linked. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The relationship between Warehouse and Warehouse Items is not configured correctly or is missing.
The subgrid must have a relationship defined between Warehouse and Warehouse Items; if the relationship is missing or incorrectly configured, the subgrid will not display related records. Option A is wrong because security roles affect visibility, not relationship. Option C is wrong because the subgrid does not require lookup field on the main form. Option D is wrong because subgrids can be added to forms.
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.
✗
The Warehouse form does not include the lookup field to Warehouse Items.
Why it's wrong here
The subgrid uses the relationship; a lookup field on the form is not required.
✗
The user does not have read permissions on the Warehouse Items entity.
Why it's wrong here
Security roles can prevent seeing records, but the subgrid would still show the grid (empty).
✓
The relationship between Warehouse and Warehouse Items is not configured correctly or is missing.
Why this is correct
Subgrids rely on a relationship to filter related records; without it, no data appears.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The subgrid component is not supported on the main form.
Why it's wrong here
Subgrids are supported on main forms.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Trap categories for this question
Command / output trap
Security roles can prevent seeing records, but the subgrid would still show the grid (empty).
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
Identify which PL-900 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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: The relationship between Warehouse and Warehouse Items is not configured correctly or is missing. — The subgrid must have a relationship defined between Warehouse and Warehouse Items; if the relationship is missing or incorrectly configured, the subgrid will not display related records. Option A is wrong because security roles affect visibility, not relationship. Option C is wrong because the subgrid does not require lookup field on the main form. Option D is wrong because subgrids can be added to forms.
What should I do if I get this PL-900 question wrong?
Identify which PL-900 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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