Updated July 1, 2023
Introduction to Tableau Interview Questions and Answers
The following article provides an outline for Tableau Interview Questions. Tableau is a business intelligence tool for reporting or online analytical processing and analytics. It is a visualization tool that data analysts use to get insights into the data from the business perspective and report.
If you are looking for a job related to Tableau, you must prepare for the 2023 Tableau Interview Questions. Though every interview is different and the scope of a job is also different, we can help you out with the top Tableau Interview Questions and answers, which will help you take the leap and get your success in your interview.
Tableau Interview Questions
Here, we will cover the list of frequently asked interview questions and their corresponding answers.
Q1. Explain Tableau and its products.
Tableau majorly focuses on providing business intelligence through its interactive data visualization product. It connects to the data, visualizes it, and creates interactive dashboards for further analysis.
Below is the list of different Tableau products:
- Tableau Desktop: A self-service data visualization and business analytics tool which is easily accessible. This optimizes the translation of data images into queries, allowing direct connection with live data from the data warehouse until the completion of data analysis. Users can execute queries without the need to write a single line of code. Tableau’s data engine imports data from various sources and integrates it by combining all the views into an interactive dashboard.
- Tableau Server: This enterprise-level Tableau software can publish Tableau desktop-based dashboards and share them using a web-based Tableau server throughout the organization. It is used to leverage a fast database by using live connections.
- Tableau online: The Tableau server’s hosted version makes business intelligence easier and faster than before. Tableau dashboards can be shared with colleagues by using the Tableau desktop.
- Tableau Reader: Free desktop application which enables you to view visualizations primarily built on Tableau Desktop. Filtering and drilling down data is possible, but editing or interaction is impossible in this case.
- Tableau Public: As the name suggests, this is the accessible version of Tableau software which can be used to make visualizations once the workbooks are saved on the Tableau server, which anyone can then view.
Q2. What are the measures and dimensions?
Measures are the numeric quantities or measurable data metrics analyzed easily by the dimension table. They are stored in the table containing foreign keys, which refers uniquely to the associated dimension tables. The data stored in the table is in atomic form, allowing more records to be inserted at a particular time. A sales table, for instance, can contain a product key, customer key, items sold, promotion key, etc., details referring to a particular event.
Dimensions are descriptive attribute values used for multiple attribute dimensions that define different characteristics. A dimension table can contain a product name, type, size, description, color, etc.
Q3. Define Aggregation and disaggregation in a tableau.
They both are ways to develop a scatterplot to measure and compare data values. As the name suggests, Aggregation is the calculated form of a specific set of values that return a single numeral value. For instance, values 1, 3, 5, and 7 will return the value.
The default aggregation, like sum, median, average, count, etc., is not user-defined. Disaggregating data is used to refer to viewing every data source row and analyzing data both dependently as well as independently.
Q4. What is a context filter, and what are its limitations?
It makes the filtering process smooth and straightforward. You can establish a filtering hierarchy by dragging the field into the filters tab, right-clicking on the field, and selecting ‘Add to context.’ This allows you to create multiple context filters to improve performance, as it avoids creating extra filters and maintains the query execution time. All the present filters refer to context filters, while other filters process the data that the context filter has already passed.
Limitations of context filter: The default behavior is that placing a filter in context takes time. When setting a filter to context, the system creates a temporary file specifically for that context filter. The table will reload every time, and it will contain the values not filtered by either context filter or by custom SQL filter.
Q5. What are Schedules and Extracts in a Tableau Server?
Data extracts are the first subdivisions or copies of actual data from original data sources. The workbook using data extracts instead of living connections is faster. After the extraction of data, users can publish their workbooks. Scheduled refresh is the designed task set used to refresh the data extract. It eliminates the need to republish the workbook every time the data is updated, saving effort and time.
Q6. Name the components of the dashboard.
The components are:
- Image Extract
- Web[URL ACTION]
Q7. What is the page shelf?
It is a unique and consequential tool for controlling the output display. It fragments the view into the line of pages, giving a different perspective on every page. This minimizes the scrolling and makes it more user-friendly. You can flip the pages through specific controls and compare them at the common axle.
Q8. What is the maximum number of tables that can be joined?
You can join a maximum of 32 tables.
Q9. What are shelves and sets?
The left and top areas of the view contain named shelves. Users build views by placing fields onto shelves, utilizing them to define a data subset primarily based on conditions through custom fields called sets. A set can be based upon a specific computed condition. For example, a set contains customers with sales more than a particular threshold. Your data changes and updates these sets.
Q10. Display the top 5 and last five records in a single view.
You need to create two sets. The first one contains the top 5 records while the other one with bottom 5. Then join these two sets by displaying a total collection of 10 records.
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