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NEW QUESTION # 37
You have a Power Bl dataset that has the query dependencies shown in the following exhibit.
Use the drop-down menus to select the answer choice that completes each statement based on the information presented in the graphic.
NOTE: Each correct selection is worth one point.
Answer:
Explanation:
Explanation
Box 1: 3
Power Query doesn't start at the first query and work down, it starts at the bottom (last) query and works backwards, so 3 tables from 1 will cause it to process that first source table 3 times.
Box 2: Using Table.Buffer in the Orders query
Table.Buffer buffers a table in memory, isolating it from external changes during evaluation. Buffering is shallow. It forces the evaluation of any scalar cell values, but leaves non-scalar values (records, lists, tables, and so on) as-is.
Note that using this function might or might not make your queries run faster. In some cases, it can make your queries run more slowly due to the added cost of reading all the data and storing it in memory, as well as the fact that buffering prevents downstream folding.
Example 1
Load all the rows of a SQL table into memory, so that any downstream operations will no longer be able to query the SQL server.
Usage
let
Source = Sql.Database("SomeSQLServer", "MyDb"),
MyTable = Source{[Item="MyTable"]}[Data],
BufferMyTable = Table.Buffer(dbo_MyTable)
in
BufferMyTable
Output
table
Reference: https://radacad.com/performance-tip-for-power-bi-enable-load-sucks-memory-up
https://docs.microsoft.com/en-us/powerquery-m/table-buffer
NEW QUESTION # 38
Note: This question is part of a series of questions that present the same scenario. Each question in the series
contains a unique solution that might meet the stated goals. Some question sets might have more than one
correct solution, while others might not have a correct solution.
After you answer a question in this section, you will NOT be able to return to it. As a result, these questions
will not appear in the review screen.
You have a Power Bl dataset named Datasetl.
In Datasetl, you currently have 50 measures that use the same time intelligence logic.
You need to reduce the number of measures, while maintaining the current functionality.
Solution: From Power Bl Desktop, you group the measures in a display folder.
Does this meet the goal?
- A. Yes
- B. No
Answer: A
NEW QUESTION # 39
You have a file named File1.txt that has the following characteristics:
* A header row
* Tab delimited values
* UNIX-style line endings
You need to read File1.txt by using an Azure Synapse Analytics serverless SQL pool.
Which query should you execute?
- A. Option D
- B. Option A
- C. Option B
- D. Option C
Answer: B
Explanation:
Explanation
Use FIELDTERMINATOR ='\t' for tab.
Use ROWTERMINATOR ='\0x0A ' for UNIX-style line endings
Use FIRSTROW= 2 for a header row
Note: Using Row Terminators
The row terminator can be the same character as the terminator for the last field. Generally, however, a distinct row terminator is useful. For example, to produce tabular output, terminate the last field in each row with the newline character (\n) and all other fields with the tab character (\t).
If you want to output a line feed character only (LF) as the row terminator - as is typical on Unix and Linux computers - use hexadecimal notation to specify the LF row terminator. For example:
bcp -r '0x0A'
FIRSTROW
FIRSTROW =first_row Specifies the number of the first row to load. The default is 1. This indicates the first row in the specified data file. The row numbers are determined by counting the row terminators. FIRSTROW is 1-based.
Reference:
https://docs.microsoft.com/en-us/sql/relational-databases/import-export/specify-field-and-row-terminators-sql-se
https://docs.microsoft.com/en-us/sql/t-sql/functions/openrowset-transact-sql
NEW QUESTION # 40
Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution that might meet the stated goals. Some question sets might have more than one correct solution, while others might not have a correct solution.
After you answer a question in this section, you will NOT be able to return to it. As a result, these questions will not appear in the review screen.
From Power Query Editor, you profile the data shown in the following exhibit.
From Power Query Editor, you profile the data shown in the following exhibit The loT GUIO and loT ID columns are unique to each row in the query.
You need to analyze loT events by the hour and day of the year. The solution must improve dataset performance.
Solution: You remove the loT GUID column and retain the loT ID column.
Does this meet the goal?
- A. No
- B. Yes
Answer: A
NEW QUESTION # 41
You have an Azure Synapse Analytics serverless SQL pool and an Azure Data Lake Storage Gen2 account.
You need to query all the files in the 'csv/taxi/' folder and all its subfolders. All the files are in CSV format and have a header row.
How should you complete the query? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.
Answer:
Explanation:
NEW QUESTION # 42
You have a dataset that is populated from a list of business categories in a source database. The list of categories changes over time.
You use Power Bl Report Builder to create a paginated report. The report has a report parameter named BusinessCategory.
You need to modify BusinessCategory to ensure that when the report opens, a drop-down list displays all the business categories, and all the business categories are selected.
How should you configure BusinessCategory? To answer, drag the appropriate options to the correct settings.
Each option may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.
NOTE: Each correct selection is worth one point.
Answer:
Explanation:
Explanation
NEW QUESTION # 43
After you answer a question in this section, you will NOT be able to return to it. As a result, these questions will not appear in the review screen.
You are using an Azure Synapse Analytics serverless SQL pool to query a collection of Apache Parquet files by using automatic schema inference. The files contain more than 40 million rows of UTF-8-encoded business names, survey names, and participant counts. The database is configured to use the default collation.
The queries use open row set and infer the schema shown in the following table.
You need to recommend changes to the queries to reduce I/O reads and tempdb usage.
Solution: You recommend defining a data source and view for the Parquet files. You recommend updating the query to use the view.
Does this meet the goal?
- A. No
- B. Yes
Answer: A
Explanation:
Explanation
Solution: You recommend using OPENROWSET WITH to explicitly specify the maximum length for businessName and surveyName.
The size of the varchar(8000) columns are too big. Better reduce their size.
A SELECT...FROM OPENROWSET(BULK...) statement queries the data in a file directly, without importing the data into a table. SELECT...FROM OPENROWSET(BULK...) statements can also list bulk-column aliases by using a format file to specify column names, and also data types.
Reference: https://docs.microsoft.com/en-us/sql/t-sql/functions/openrowset-transact-sql
NEW QUESTION # 44
You have a Power Bl data model that contains two tables named Products and Sales.
A one-to-many relationship exists between the tables.
You have a report that contains a report-level filter for Products.
You need to create a DAX measure that will return the percent of total sales for each product. The measure must respect the report-level filter when calculating the total.
How should you complete the measure? To answer, drag the appropriate DAX functions to the correct targets. Each function may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.
NOTE: Each correct selection is worth one point.
Answer:
Explanation:
NEW QUESTION # 45
You have a Power Bl report that contains one visual.
You need to provide users with the ability to change the visual type without affecting the view for other users.
What should you do?
- A. From Visual options in Report settings, select Use the modern visual header with updated styling options.
- B. From Report setting, select Personalize visuals.
- C. From Tabular Editor, create a new perspective.
- D. From the Bookmarks pane, select Focus mode, and then select Add.
Answer: B
NEW QUESTION # 46
You are running a diagnostic against a query as shown in the following exhibit.
What can you identify from the diagnostics query?
- A. Some query steps are folding.
- B. All the query steps are folding.
- C. Elevated permissions are being used to query records.
- D. The query is timing out.
Answer: B
Explanation:
Understanding folding with Query Diagnostics
One of the most common reasons to use Query Diagnostics is to have a better understanding of what operations were 'pushed down' by Power Query to be performed by the back-end data source, which is also known as 'folding'. If we want to see what folded, we can look at what is the 'most specific' query, or queries, that get sent to the back-end data source. We can look at this for both ODATA and SQL.
NEW QUESTION # 47
Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution that might meet the stated goals. Some question sets might have more than one correct solution, while others might not have a correct solution.
After you answer a question in this section, you will NOT be able to return to it. As a result, these questions will not appear in the review screen.
You have the Power BI data model shown in the exhibit (Click the Exhibit tab.)
Users indicate that when they build reports from the data model, the reports take a long time to load.
You need to recommend a solution to reduce the load times of the reports.
Solution: You recommend denormalizing the data model.
Does this meet the goal?
- A. Yes
- B. No
Answer: A
Explanation:
Explanation
Denormalize For Performance.
Even though it might mean storing a bit of redundant data, schema denormalization can sometimes provide better query performance. The only question then becomes is the extra space used worth the performance benefit.
Reference: https://www.mssqltips.com/sqlservertutorial/3211/denormalize-for-performance/
NEW QUESTION # 48
What should you configure in the deployment pipeline?
- A. a data source rule
- B. a backward deployment
- C. auto-binding
- D. a selective deployment
Answer: C
NEW QUESTION # 49
You have a Power Bl tenant that contains 10 workspaces.
You need to create dataflows in three of the workspaces. The solution must ensure that data engineers can access the resulting data by using Azure Data Factory.
Which two actions should you perform? Each correct answer presents part of the solution.
NOTE: Each correct selection is worth one point
- A. Create and save the dataflows to the internal storage of Power BI
- B. Associate the Power Bl tenant to an Azure Data Lake Storage account.
- C. Create and save the dataflows to an Azure Data Lake Storage account.
- D. Add the managed identity for Data Factory as a member of the workspaces.
Answer: B,C
Explanation:
Explanation
Data used with Power BI is stored in internal storage provided by Power BI by default. With the integration of dataflows and Azure Data Lake Storage Gen 2 (ADLS Gen2), you can store your dataflows in your organization's Azure Data Lake Storage Gen2 account. This essentially allows you to "bring your own storage" to Power BI dataflows, and establish a connection at the tenant or workspace level.
Reference:
https://docs.microsoft.com/en-us/power-bi/transform-model/dataflows/dataflows-azure-data-lake-storage-integra
NEW QUESTION # 50
You use the Vertipaq Analyzer to analyze tables in a dataset as shown in the Tables exhibit. (Click the Tables tab.)
The table relationships for the dataset are shown in the Relationships exhibit. (Click the Relationships tab.)
You need to reduce the model size by eliminating invalid relationships.
Which column should you remove?
- A. Sales[Sales Amount]
- B. Sales[Sales ID]
- C. Plan[RowlD]
- D. Sales[RowlD]
Answer: B
Explanation:
Explanation
Sales[Row ID] has 858,786 missing keys and 858,789 Max From Cardinality.
Note: The Max From Cardinality column defines the cost of the relationship which is the amount of time DAX needs to transfer the filters from the dimensions table to the fact table.
Reference: https://blog.enterprisedna.co/vertipaq-analyzer-tutorial-relationships-referential-integrity/
NEW QUESTION # 51
Note: This question is part of a series of questions that present the same scenario. Each question in the series
contains a unique solution that might meet the stated goals. Some question sets might have more than one
correct solution, while others might not have a correct solution.
After you answer a question in this section, you will NOT be able to return to it. As a result, these questions
will not appear in the review screen.
You have a Power Bl dataset named Datasetl.
In Dataset1, you currently have 50 measures that use the same time intelligence logic.
You need to reduce the number of measures, while maintaining the current functionality.
Solution: From DAX Studio, you write a query that uses grouping sets.
Does this meet the goal?
- A. No
- B. Yes
Answer: A
NEW QUESTION # 52
You are building a Power Bl dataset that will use two data sources.
The dataset has a query that uses a web data source. The web data source uses anonymous authentication.
You need to ensure that the query can be used by all the other queries in the dataset.
Which privacy level should you select for the data source?
- A. None
- B. Organizational
- C. Private
- D. Public
Answer: D
Explanation:
A Public data source gives everyone visibility to the data contained in the data source. Only files, internet data sources, or workbook data can be marked Public. Data from a Public data source may be freely folded to other sources.
NEW QUESTION # 53
Note: This question is part of a series of questions that present the same scenario. Each question in the series
contains a unique solution that might meet the stated goals. Some question sets might have more than one
correct solution, while others might not have a correct solution.
After you answer a question in this section, you will NOT be able to return to it. As a result, these questions
will not appear in the review screen.
You have the Power Bl data model shown in the exhibit. (Click the Exhibit tab.)
Users indicate that when they build reports from the data model, the reports take a long time to load.
You need to recommend a solution to reduce the load times of the reports.
Solution: You recommend normalizing the data model.
Does this meet the goal?
- A. Yes
- B. No
Answer: A
NEW QUESTION # 54
You have an Azure Synapse notebook.
You need to create the visual shown in the following exhibit.
How should you complete the code? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.
Answer:
Explanation:
Explanation
Box 1: fill_between
atplotlib.pyplot.fill_between fills the area between two horizontal curves.
The curves are defined by the points (x, y1) and (x, y2). This creates one or multiple polygons describing the filled area.
Box 2: suptitle
Set the title of the visual.
suptitle adds a centred title to the figure.
Reference:
https://matplotlib.org/3.1.1/api/_as_gen/matplotlib.pyplot.fill_between.html#matplotlib.pyplot.fill_between
https://matplotlib.org/3.1.1/api/_as_gen/matplotlib.pyplot.suptitle.html#matplotlib.pyplot.suptitle
NEW QUESTION # 55
You need to recommend a solution to resolve the query issue of the serverless SQL pool. The solution must minimize impact on the users.
What should you in the recommendation?
- A. Move the data from the serverless SQL pool to a dedicated SQL pool.
- B. Update the statistics for the serverless SQL pool.
- C. Execute the sp_sec_process_daca_limic stored procedure for the serverless SQL pool.
- D. Move the data from the serverless SQL pool to a dedicated Apache Spark pool.
Answer: A
Explanation:
Users indicate that queries against the serverless SQL pool fail occasionally because the size of tempdb has been exceeded.
In the dedicated SQL pool resource, temporary tables offer a performance benefit because their results are written to local rather than remote storage.
Temporary tables in serverless SQL pool.
Temporary tables in serverless SQL pool are supported but their usage is limited. They can't be used in queries which target files.
For example, you can't join a temporary table with data from files in storage. The number of temporary tables is limited to 100, and their total size is limited to 100 MB.
NEW QUESTION # 56
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Certification Topics of Microsoft DP-500 Exam
Explore and visualize data (20-25%)
Implement and manage data models (25 -30%)
Query and transform data (20-25%)
Implement and manage a data analytics environment (25-30%)
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