The answer is to select the 'Sales' sheet in the Navigator dialog and click 'Transform Data'. This is correct because the Navigator dialog in Power Query Editor acts as a filter for your data source, allowing you to preview and choose only the specific tables or sheets you need before any data is loaded into the query editor. By selecting a single sheet and clicking 'Transform Data', you bypass loading the entire workbook, which is the efficient and intended method for importing only one sheet from a multi-sheet Excel workbook. On the Microsoft Power BI Data Analyst PL-300 exam, this scenario tests your understanding of data source navigation and the critical difference between 'Load' and 'Transform Data'—a common trap is clicking 'Load' directly, which imports the data without transformation options. Remember the memory tip: "Navigate, Select, Transform" to avoid loading unnecessary sheets.
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 importing data from an Excel workbook that contains multiple sheets. You only need data from the 'Sales' sheet. In Power Query Editor, what should you do to load only that sheet?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
In the Navigator dialog, select the 'Sales' sheet and click 'Transform Data'.
In Power Query Editor, the Navigator dialog allows you to preview and select specific tables or sheets from a data source before loading. By selecting the 'Sales' sheet and clicking 'Transform Data', you load only that sheet into Power Query Editor for transformation, avoiding unnecessary data. This is the correct and efficient method to import a single sheet from a multi-sheet Excel workbook.
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.
✗
Load all sheets, then delete the queries for sheets you don't need.
Why it's wrong here
This loads unnecessary data and is inefficient.
✓
In the Navigator dialog, select the 'Sales' sheet and click 'Transform Data'.
Why this is correct
Navigator allows you to choose specific sheets or tables to load.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use a filter transform to exclude rows from other sheets.
Why it's wrong here
Filtering rows is for row-level filtering, not sheet selection.
✗
Select the entire workbook and then filter out other sheets in Power Query.
Why it's wrong here
Filtering sheets is not a standard operation; you must select the sheet at import.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may think they can use a filter or query folding to exclude entire sheets after loading, but Power Query treats each sheet as a separate table, not as rows within a single table, so filtering cannot remove sheets.
Detailed technical explanation
How to think about this question
When connecting to an Excel workbook, Power Query uses the Excel Data Access Engine to enumerate all sheets and named ranges. The Navigator dialog displays these as distinct data sources, each with its own schema. Selecting a single sheet and clicking 'Transform Data' creates a query bound only to that sheet's data range, preventing any cross-sheet dependencies and reducing the metadata footprint. This approach also avoids the need to handle potential data type conflicts or column mismatches that can arise when combining multiple sheets.
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.
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: In the Navigator dialog, select the 'Sales' sheet and click 'Transform Data'. — In Power Query Editor, the Navigator dialog allows you to preview and select specific tables or sheets from a data source before loading. By selecting the 'Sales' sheet and clicking 'Transform Data', you load only that sheet into Power Query Editor for transformation, avoiding unnecessary data. This is the correct and efficient method to import a single sheet from a multi-sheet Excel workbook.
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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