PL-300: Microsoft Power BI Data Analyst
Which of the following sources can Power BI connect to?
SQL Database
Google Analytics
R scripts
All of the above
Answer is All of the above
Power BI can connect to virtually any type of data source, including (but not limited to) SQL databases, R scripts, and Google Analytics.
What is the Query Editor used for?
As a cloud-based storage option for your organization's data
To shape & transform data, then load it into Power BI
To create relationships between data and lookup tables
To create measures & calculated columns using DAX
Answer is To shape & transform data, then load it into Power BI
Once you connect to data, the Query Editor lets you shape & transform the data to meet your needs, then load that model into Power BI Desktop
In which storage mode are tables solely stored in-memory and queries fulfilled by cached data?
Import
DirectQuery
Dual
Native
Answer is Import
In import storage mode, tables are stored in-memory, whereas in DirectQuery tables are connected directly to the source. Dual storage mode allows tables to come from in-memory data or by an on-demand query to the data source.
When should you use DirectQuery?
The source data never changes
Company policy states no data source restrictions
Dataset is too large to be stored in-memory
All of the above
Answer is Dataset is too large to be stored in-memory
Use DirectQuery when the dataset is too large to be stored in-memory, when the source data changes frequently & reports must show the most recent data, and when the company policy states data can only be accessed from the original source.
When would you need to access the Data Source Settings?
If you need to connect to a new data source
If you need to edit and existing query
If the file name or location changes
All of the above
Answer is If the file name or location changes
Connections to local files reference the exact path, so if the file name or location changes, you will need to change the source via the Data Source Settings
How can you use parameters when connecting to data?
To connect to a JSON file
To change data source values dynamically
To create "What-If" scenarios
To shape and transform data in the Query Editor
Answer is To change data source values dynamically
Parameters are a useful way to change data source values dynamically in Power Query. These parameters are different from the "What-If" parameters created in the Power BI Desktip front-end.
Which of the following sources lets you connect your data to other business applications?
Microsoft Dataverse
Microsoft Dataplatform
Microsoft Dataflows
Microsoft Excel
Answer is Microsoft Dataverse
The Dataverse is a cloud-based storage options for your organization's data that you can connect to business applications like Power Apps, Power Automate, and Power Virtual Agents
You have a Microsoft Excel spreadsheet that contains a table named Sales.
You need to add the Sales table to a Power BI dashboard as a tile.
How should you configure the tile?
From the Power BI service, import the data from the Excel workbook.
From Excel, publish the workbook to the Power BI service.
From the Power BI tab in Excel, pin the table.
From the Power BI service, upload the Excel workbook.
Answer is From the Power BI tab in Excel, pin the table.
References:
https://docs.microsoft.com/en-us/power-bi/publisher-for-excel
You have two Microsoft SQL Server database servers named SQLProd and SQLDev. SQLDev contains the same tables as SQLProd, but only a subset of the data in SQLProd.
You create a new Power BI Desktop model that uses 120 tables from SQLDev.
You plan to publish the Power BI file to the Power BI service.
You need to connect the model to the tables in SQLProd. The solution must minimize administrative effort.
What should you do from Query Editor before you publish the model?
Create a new connection to SQLProd, and then import the tables from SQLProd.
Delete the existing queries, and then add new data sources.
Configure the Data source settings.
Edit the source of each table query.
Answer is Configure the Data source settings.
Query Editor >>Data Source setting as well as through Query editor >> Query Setting >> Source.
So both option C and D are justified. But its required least amount of administrative effort so will go for option C.
Reference:
https://www.c-sharpcorner.com/article/how-to-change-data-source-of-existing-report-in-power-bi/
You plan to create several datasets by using the Power BI service.
You have the files configured as shown in the following table.
You need to identify which files can be used as datasets.
Which two files should you identify?
Data 1
Data 2
Data 3
Data 4
Data 5
Answer is 2 and 4
a) TSV is not supported via Power BI Service, and in question it clearly says "by using Power BI Service".
b) XLSX 3 gb will not work for Pro licence, but it will work for Premium licence. In question there is no mention about licence type so this option will work for some customers, for some not. Partially correct.
c) XML is not supported via Power BI Service, and in question it clearly says "by using Power BI Service".
d) CSV, same as xlsx 3gb, it will work for Premium licence. Partially correct.
e) JPG is not suported via Power BI Service.
For XML Table (.xml) or text (.txt) files, you must load that data into an Excel or Power BI Desktop file first. You can then import the Excel or Power BI Desktop file into Power BI Service.
There's a 1-GB limit for datasets stored in Shared capacities in the Power BI service. If you need larger datasets, you can use Power BI Premium.
References:
https://docs.microsoft.com/en-us/power-bi/service-get-data