The correct answer is that the attachment exceeds the maximum file size allowed by Power Automate. This is because Power Automate enforces a hard limit—typically around 100 MB for standard connectors—on the size of attachments that can be processed within a flow. When a SharePoint list item triggers an approval action and includes a large attachment, the flow fails because the attachment data exceeds this threshold and cannot be transmitted through the connector. On the Microsoft Power Platform Fundamentals PL-900 exam, this scenario tests your understanding of Power Automate’s built-in constraints and how they cause flow failures, often appearing as a distractor where candidates might incorrectly blame SharePoint permissions or licensing. A common trap is assuming the issue is with the SharePoint list itself, but the real culprit is the attachment size limit within the flow engine. Memory tip: think “100 MB wall”—if your attachment is bigger, your flow will fall.
PL-900 Practice Question: Identify foundational components of Power Platform
This PL-900 practice question tests your understanding of identify foundational components of power platform. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 uses Power Automate to send approval requests. The flow is triggered when a new item is added to a SharePoint list. However, the flow fails when the item contains a large attachment. 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 attachment exceeds the maximum file size allowed by Power Automate
Power Automate imposes a maximum file size limit for attachments processed within flows. When a SharePoint list item includes a large attachment that exceeds this limit, the flow fails during the approval action because the attachment data cannot be transmitted. This is a known constraint in Power Automate, typically around 100 MB for standard connectors, and is the most direct cause of the failure described.
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 flow is using the wrong trigger
Why it's wrong here
The trigger is correct for new items.
✗
The approval action is not configured for attachments
Why it's wrong here
Approval actions can handle attachments, but size is still limited.
✗
The SharePoint list is not properly configured for large files
Why it's wrong here
SharePoint can handle large files, but Power Automate has limits.
✓
The attachment exceeds the maximum file size allowed by Power Automate
Why this is correct
Power Automate has a 100 MB limit for file-related actions.
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.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse SharePoint's large file configuration (which supports files up to 250 GB) with Power Automate's attachment size limit, leading them to incorrectly select Option C.
Detailed technical explanation
How to think about this question
Power Automate uses the SharePoint connector which, under the hood, relies on REST API calls to retrieve attachment content. The connector has a hard limit of approximately 100 MB for file attachments in standard flows, and exceeding this causes an HTTP 413 Payload Too Large error. In real-world scenarios, users often encounter this when attaching high-resolution images or large PDFs to approval requests, and the workaround involves using a premium connector or splitting the file into chunks.
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.
Identify foundational components of Power Platform — This question tests Identify foundational components of Power Platform — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The attachment exceeds the maximum file size allowed by Power Automate — Power Automate imposes a maximum file size limit for attachments processed within flows. When a SharePoint list item includes a large attachment that exceeds this limit, the flow fails during the approval action because the attachment data cannot be transmitted. This is a known constraint in Power Automate, typically around 100 MB for standard connectors, and is the most direct cause of the failure described.
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.
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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Question Discussion
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