Knowledge Based Questions Flashcards
To connect to multiple tables in a single data source at one time, what must be specified?
A join
Tableau can create worksheet-specific filters
True
What does the box in a box plot represent
The range of the middle half of the data points
The interquartile range is the difference between the 2nd and 3rd quantiles
False
The median is the number separating the lower half of the data from the higher half. It is the same as the 50th percentile or the 2nd quartile.
True
The calculation [ship date] - [order date] will return
Number of days between them
What is wrong with this if statement:
IF Sales > 100 AND “Delivery Truck” THEN 0 END
There should be a clause for “Delivery Truck” e.g.
[shipping mode] = “Delivery Truck”
What will the function LEFT(3, “Tableau”) return?
Error
All rows from both tables are returned in an INNER JOIN
False
LEFT JOIN returns all rows from the left table, with the matching rows in the right table
True
A LEFT JOIN or INNER JOIN creates a row each time the join criteria is satisfied, which can result in duplicate rows. One way to avoid this is to use data blending instead.
True
The term “addressing” refers to the direction of a calculation
True
SUM is a table calculation
False
The benefits of creating a Tableau data extract include improving performance and allowing offline access to the data
True
The metadata grid displays the fields in your data source in columns
False
______ is a technique in Tableau which will identify marks with similar characteristics
Clustering
Which of the following is used to assess trend line significance
p-value
If you would like your Top N or Bottom N set to change depending on what filter choices are changed, what type of filter should use?
Context filters
Sorts can break the dimension hierarchy. In other words, Tableau will rearrange any the headers of the fields that appear to the left of the sorted field.
False
Which of the following are generated fields in Tableau?
Number of Records, Measure Names, Measure Values, Longitude & Latitude
Pareto charts combine the following element
…
Bullet graphs combine bar charts and reference lines
True
You want to email a packaged workbook containing a Tableau dashboard to a coworker who does not have a license for Tableau Desktop. Which application will allow her to view the dashboard you send via email?
Tableau reader
A visual best practice is that if you are using a colour gradient to represent a continuous variable which can be negative or positive, you could use a single colour range
False
The AVG function does nit treat null values as zeros. Rather, the AVG function ignores null values.
TRUE
An aggregated calculation can be multiplied by a non-aggregated constant
True
When using a ____ join the result is a table that contains all values from the LEFT table and corresponding matches from the right table.
LEFT JOIN
If you see duplicate data after doing a join you may be able to eliminate the duplication by which of the following?
Change the join condition
______ is a tendency to increase or decrease over time
Trend
Which of the following graph types provide information on the distribution of a continuous measure?
Box Plot
Positive Skewness means the extreme values are to the right, while negative skewness means the extreme values are to the left.
True
When you sort data in a hierarchy, Tableau rearranges headers that appear before the sorted field.
False
Context filters are executed after data source filters
True
Tableau displays an axis when you drop this onto the Rows or Columns shelf.
Continuous field, Measure values
Gantt charts are useful for
Displaying duration of events or activities over time
Bins acts as a containers that summarise data for a specific range of values. Without using a calculated field, Tableau’s bin feature allows you to create variable sized bins.
False