The answer is to use the SharePoint folder connector, filter by .xlsx, then expand the Content column and filter by sheet name 'Sales'. This approach is correct because the SharePoint folder connector retrieves all files in the folder as binary data, and expanding the Content column reveals the individual sheets within each workbook, allowing you to isolate and combine only the 'Sales' sheet across multiple files. On the PL-300 exam, this tests your understanding of how Power Query handles folder-level transformations versus single-file imports, with a common trap being to use the "Combine Files" transform prematurely, which merges all sheets instead of a specific one. The key distinction is that you must first filter the sheet name after expanding Content, not before. Remember the memory tip: "Filter files first, then sheets second" — always apply your file-level filter (like .xlsx) before drilling into the workbook content to avoid processing unnecessary data.
PL-300 Prepare the data Practice Question
This PL-300 practice question tests your understanding of prepare the data. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 are connecting to a SharePoint folder that contains Excel workbooks. Each workbook has multiple sheets. You need to combine data from a specific sheet named 'Sales' across all workbooks. Which Power Query approach should you use?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use the SharePoint folder connector, filter by .xlsx, then expand the Content column and filter by sheet name 'Sales'.
Option B is correct because the SharePoint folder connector retrieves all files in the folder, including Excel workbooks. By filtering for .xlsx files and then expanding the Content column, you access the binary data of each workbook. You can then filter by the 'Sales' sheet name to combine data from that specific sheet across all workbooks, which is the only approach that directly handles multiple workbooks with multiple sheets.
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 the SharePoint Online List connector and select the document library.
Why it's wrong here
The SharePoint Online List connector retrieves list data, not file contents.
✓
Use the SharePoint folder connector, filter by .xlsx, then expand the Content column and filter by sheet name 'Sales'.
Why this is correct
This approach correctly navigates to the folder, reads each Excel file, and combines data from the specified sheet.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use the Excel connector and specify the folder path.
Why it's wrong here
The Excel connector expects a single file path, not a folder.
✗
Use the Web connector and provide the SharePoint site URL.
Why it's wrong here
The Web connector is for HTML tables, not Excel files in SharePoint.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse the SharePoint folder connector with the SharePoint Online List connector, mistakenly thinking the list connector can access document libraries, when it is strictly for list data.
Detailed technical explanation
How to think about this question
Under the hood, the SharePoint folder connector uses the SharePoint REST API to enumerate files in the folder, returning metadata and a binary Content column. When you expand the Content column, Power Query invokes the Excel workbook parser (using the OLE DB or Open XML SDK) to read the workbook structure, allowing you to filter by sheet name. A subtle behavior is that the sheet name filter must match exactly (case-insensitive by default), and if a workbook lacks a 'Sales' sheet, it will return an error unless you handle missing sheets with error handling.
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 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 exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Prepare the data — This question tests Prepare the data — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use the SharePoint folder connector, filter by .xlsx, then expand the Content column and filter by sheet name 'Sales'. — Option B is correct because the SharePoint folder connector retrieves all files in the folder, including Excel workbooks. By filtering for .xlsx files and then expanding the Content column, you access the binary data of each workbook. You can then filter by the 'Sales' sheet name to combine data from that specific sheet across all workbooks, which is the only approach that directly handles multiple workbooks with multiple sheets.
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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