Most Frequently Asked Tableau Interview Questions

Yet another common Tableau interview question, The dashboard is made up of five parts.

• Web: It is a web page embedded in the dashboard.

• Horizontal component: A horizontal layout container into which we may insert things.

• Vertical component: A vertical layout container into which we may insert things.

• Image Extract: This feature allows you to upload an image from your PC to the dashboard.

• Text: It is a little Wordpad in which we may format and modify text.

Tableau cannot display null values on the axis. As a result, an indicator will appear in the lower right corner of the screen. When you click on that indication, you will be given alternatives for dealing with null values. The alternatives for dealing with null values are listed below.

• Filter Data – If you select this option, all null values will be filtered or removed from the display.

• Show Data at Default Location – Replaces the null value with the default value and displays the data on the axis at the default position. The data type of the field determines these default values. The defaults of a certain data type are listed below.

Numbers →0
Dates → 12-31-1899
Geographic Location → (0,0)
Negative Values → 1

• Tableau is simple and easy to use.

• Tableau assists in data analysis and may be used to convert raw data into an understandable manner.

• Users may combine the data with other data to build their views on it, which they can then share with clients and colleagues.

• Users have the ability to manage a significant amount of data.

• It is simple to integrate with various data sources.

• Tableau can generate complicated graphs that resemble pivot table graphs in Excel.

• It performs fast computations on datasets.

• Users may quickly generate graphics and switch between types to get the model that best represents the user conversations.

Tableau’s filters are the simplest and most easy tool. It is immediately applicable to dimensions or measurements. For example, we may use the filter to show only Gujarat or Karnataka in a State dimension. There are several UI possibilities for filters in Tableau, including radio buttons, drop-down lists, checkboxes, sliders, and more. Tableau has sheet-based filters too.

Parameters are similar to variables. They are more complicated and stronger. A parameter, like a variable, may be used in calculations. That indicates it can only accept a single value. Except for checkboxes, which don’t have a single value, all parameters have the same UI choices. For example, we may define an interest rate and a period and then use these parameters to compute interest and principal payments.

• Reduce the number of fields.

• Reduce the number of records.

• Reduce the marks in your view

• Limit the number of filters.

• Make use of an include filter.

• Make use of a continuous data filter.

• Use action filters and parameters to your advantage.

• Cut down on the number of nested computations.

• Custom SQL should be removed.

• Organize and clean up the workbooks.

A few Tableau extensions are listed below:

• Tableau Workbook (.twb)

• Tableau Data Extraction (.tde)

• Tableau Datasource (.tds)

• Tableau Packaged Datasource (.tdsx)

• Tableau Bookmark (.tbm)

• Tableau Map Source (.tms)

• Tableau Packaged Workbook (.twbx) Is a zip file containing. twb and external files.

• Tableau Preferences (.tps)

Covering this one of the common Tableau Interview Questions, Traditional BI systems are solid and capable of scaling and dependability, and several well-known software companies have endorsed them. These systems provide adequate data security; nevertheless, they require excellent BI technical knowledge and expertise to operate. Traditional BI tools include Oracle BI and QlikView.

Tableau is one of the most popular BI tools today, providing simple operation and understanding without requiring extensive knowledge of BI capabilities. It has simple drag-and-drop capabilities and a clever approach to organizing data fields. However, data security is unavailable in Tableau Public, whereas security is enabled in the professional edition.

To embed views and modify the default look, do the following:

• Obtain the embed code provided with the view: The Share button at the top of each view has an embed code that may be copied and pasted onto a web page. (If the showShareOptions option is set to false in the code, the Share button does not appear in embedded views.)

• Customize the embed code: The embed code may be customized with parameters that regulate the toolbar, tabs, and more.

• Use the Tableau JavaScript API: Tableau JavaScript objects may be used in web apps. Visit the Tableau Developer Portal to get access to the API, code samples, documentation, and Tableau developer community.

A calculated field is used to create newly updated and modified fields from existing data in a data source. It may be used to make more robust visualizations without affecting the original dataset.

for example, Calculate the “average delay to ship,”

The data set under consideration here contains order date and ship date information for four distinct regions. To make a calculated field, follow these steps:

• Step 1: Go to Analysis > Choose to Create Calculated Field.
• Step 2: A computation editor appears on the screen. Give the computed field a name, like Shipping Delay.
• Step 3: Enter the formula: DATEDIFF (‘day,’ [Order Date], [Ship Date])
• Step 4: Click the OK button.
• Step 5: Bring Shipping Delay into view.
• Step 6: Repeat steps 1–5 to create a new calculated field called ‘Average Shipping Delay’ using the formula: AVG (DATEDIFF (‘day,’ [Order Date], [Ship Date])).
• Step 7: Drag the Region field to the Rows shelf and SUM (Average Shipping Delay) to the Marks card to see the average shipping delay for each region.