Tableau Data Connections and Preparation 2

Question 1

When connecting to a PDF file in Tableau Desktop, which of the following is a key limitation?

Accepted Answer

Only text content is extracted; charts and images are ignored

Answer

When Tableau connects to a PDF, it extracts tabular text data only; graphical charts and images within the PDF are not parsed into usable data.

Question 2

Which Tableau feature allows you to combine rows from two data sources that share the same fields and structure?

Accepted Answer

Union

Answer

Union stacks rows from tables with matching column structures into a single combined table, unlike joins which combine columns.

Question 3

In Tableau, what is the purpose of the 'Input' step in Tableau Prep Builder when building a flow?

Accepted Answer

To specify the data source and initial connection settings

Answer

The Input step in Tableau Prep Builder is where you connect to your data source and configure initial connection settings such as filters and sampling.

Question 4

What happens to NULL values when you create a wildcard union in Tableau?

Accepted Answer

Columns that don't exist in a particular sheet are filled with NULL

Answer

In a wildcard union, when sheets have differing columns, Tableau fills the missing column values with NULL for rows sourced from sheets that lack those columns.

Question 5

Which connection type should you choose if you want Tableau to store a copy of the data locally for faster performance?

Accepted Answer

Extract connection

Answer

An Extract connection saves a snapshot of the data in Tableau's .hyper format locally, enabling faster query performance independent of the original data source.

Tableau Practice Test

Tableau Practice Test

Tableau Data Connections and Preparation 2