150 Tableau Interview Questions and Answers 2022 Update : Current School News

150 Tableau Interview Questions and Answers 2022 Update

Filed in Articles, Interviews by on March 24, 2022

APPLY NOW 👉 WORK IN CANADA WITH FREE SPONSORSHIP!


 

– Tableau Interview Questions –

Are you preparing for a Tableau interview and in need of help in obtaining Tableau interview questions? You’ve arrived at the right place. Here are some of the most frequently asked questions in a Tableau interview.

Tableau Interview Questions

About Tableau

Data is the currency of business, allowing for more informed decision-making based on granular data. Tableau, which enables interactive, data-based visualizations, is one of the leading tools for making sense of data in a business setting.

As data-centric business processes gain traction, so will the demand for Tableau professionals. And answering those tough tableau interview questions is critical if you want to work in one of these demanding fields!

Some Advantages of Using Tableau

Data Visualization

Tableau provides beautiful insights, data blending, and dashboarding derived from data rather than complex computations on an Excel sheet.

Create Interactive Visualizations

Tableau includes a drag-and-drop feature that allows users to quickly interact with data. In the tableau gallery, you can see some templates that have been created using tableau.

You can select and customize your option from Tableau’s template gallery. You can easily embed tons of information as infographics that appeal to the audience using data visualization features.

Ease of Implementation

Tableau is said to be easier to use with drag-and-drop options. This is one such tool that you can learn without any prior coding experience or knowledge of Python, Business Objects, or DOMO.

Handle Massive Amounts of Data

Tableau is capable of handling millions of rows without affecting dashboard performance.

Integration of Scripting Languages

By importing some visuals or packages, you can use Tableau to perform complex data computations in scripting languages such as Python and R.

With so much hype surrounding data analytics and visualization, it is critical to becoming familiar with the tools that help to simplify the data journey. We’ve compiled a list of interview questions ranging from beginner to expert level to help you land a job in your field of expertise.

In this article, you will learn a series of Tableau interview questions (and answers) you may encounter if you’re interviewing for a job using Tableau. Reviewing these Tableau interview questions will help you ace your Tableau interview in one go!

Basic Tableau Interview Questions and Answers

Reviewing these Tableau interview questions will help you ace your Tableau interview in one go!

1. What is Tableau?

Tableau is the powerful and fastest visualizing tool that is used in the Business Intelligence(BI) Industry. It simplifies the raw data into an understandable format.

Analysis of the data becomes faster with Tableau. They can create the visualizations as dashboards.

The employees of the organizations who are at different levels can easily understand the visualizations or diagrammatic representation of data.

2. What is Data Visualization?

Data visualization means the graphical representation of data or information.

We can use visual objects like graphs, charts, bars, and a lot more. Data visualization tools provide an accessible way to see and understand the data easily.

3. List out Tableau File Extensions.

Below are a few extensions in Tableau:

Tableau Workbook (. twb)

Tableau Data extract (. tde)

Tableau Datasource (. tds)

Tableau Packaged Data source (. tdsx)

Tableau Bookmark (. tbm)

Tableau Map Source (. tms)

‣ Tableau Packaged Workbook (.twbx)–a zip file containing. twb and external files.

‣ Tableau Preferences (.tps)

4. What is the Latest Version of Tableau Desktop?

Tableau Desktop’s latest version is 2021.3 (as of, 7thSep 2021).

5. Define LOD Expression?

LOD Expression stands for Level of Detail Expression, and it is used to run complex queries involving many dimensions at the data sourcing level.

Intermediate Tableau Interview Questions and Answers

6. Define Heat Map?

A heat map is a graphical representation of data that uses the colour-coding technique to represent different values of data. As the marks heat up due to their higher value, dark colours will be shown on the map.

7. Define TreeMap?

TreeMap is a visualization that organizes data hierarchically and shows them as a set of nested rectangles.

The size and colours of rectangles are respective to the values of the data points they project. Parent rectangles will be tiled with their child elements.

Tableau Interview Questions

8. What is the Difference Between a Heat map and Treemap?

TreeMap Heat MapIt represents the data hierarchically and shows them as a set of nested rectangles. It represents the data graphically which uses multiple colours to represent different values.

They use it for comparing the categories with colours, size, and they can also use it for illustrating the hierarchical data and part to whole relationships.

It is used for comparing the categories based on colour and size. And also it is great in spotting the patterns based on the density of the information.

The colours and size of rectangles are respective to the values of the data points When their values are higher or the density of records, the data will represent in dark colour.

9. What is a Parameter Tableau? And how does it work?

Parameters are dynamic values, we can replace the constant values in calculations.

10. Give a Brief About the Tableau Dashboard?

Tableau dashboard is a group of various views which allows you to compare different data simultaneously.

Datasheets and dashboards are connected if any modification happens to the data that directly reflects in dashboards. It is the most efficient approach to visualize the data and analyze it.

READ ALSO!!!

Real-Time Tableau Interview Questions and Answers

11. Define Page Shelf in Tableau?

Page shelf breaks the views into a series of pages. It displays an alternate view on each page. Due to this feature, you can analyze the effect of each field on the rest of the data in the view.

12. Define the Story in Tableau?

We can define the story as a sheet which is a collection of a series of worksheets and dashboards used to convey the insights of data.

A story can show the connection between facts and outcomes that impacts the decision-making process. A story can be published on the web or can be presented to the audience.

13. Summarize the Fact and Dimensions of the Table?

Facts are numeric measures of data. They store it in fact tables. Fact tables store that type of data that dimension tables will analyze. Fact tables have foreign keys associated with dimension tables.

Dimensions are descriptive attributes of data. Those will be stored in the dimensions table.

For example, customers’ information like name, number, and email will be stored in the dimension table.

14. What is Data Modelling?

Data modelling is the analysis of data objects that are used in a business or other context and also used as identification of the relationships among these data objects. It is the first step of doing object-oriented programming.

15. Define Dual-axis?

Dual-axis is used to show 2 measures in a single graph. It allows you to compare 2 measures at once.

Many websites like indeed use this Dual-axis to show the comparisons and growth rate.

Top Tableau Interview Questions and Answers

16. Define the Blended Axis?

Multiple measures can share in a single axis so that all the marks will be shown in a single pane. We can blend measures by dragging the 1st measure on one axis and the 2nd on the existing axis.

17. Define Shelves and Sets?

Shelves: Every worksheet in Tableau will have shelves such as columns, rows, marks, filters, pages, and more.

By placing filters on shelves we can build our own visualization structure. We can control the marks by including or excluding data.

Sets: The sets are used to compute a condition on which the dataset will be prepared. Data will be grouped together based on a condition. Fields which is responsible for grouping are known assets. For example–students have grades of over 70%.

18. Explain the Limitation of Context Filters in Tableau?

Whenever we set a context filter, Tableau generates a temp table that needs to refresh every time, whenever the view is triggered.

So, if the context filter is changed in the database, it needs to recompute the temp table, so the performance will be decreased.

19. What is Mark Card in Tableau?

Mark card is a card to the left of the view where we can drag fields and control mark properties like colour, size, type, shape, detail, label, and tooltip.

20. Define Published Data Source?

When you are ready to make a data source available to other tableau desktop users. You can publish it to the tableau server or online.

Or else you can make it available by saving the same like embedded excel or text file.

21. Define Dual-axis?

Dual-axis is used to show 2 measures in a single graph. It allows you to compare 2 measures at once. Many websites like indeed use this dual-axis to show the comparisons and growth rate.

Mind-blowing Tableau Interview Questions

22. Define Bullet Graph?

A bullet graph is a variant of a Bar graph. It compares the performance of one measure with other measures.

23. Define Gantt chart?

Gantt Chart displays the progress of value over the period. It comprises bars along with the time axis. It is a project management tool. Here, each bar is a measure of a task in the project framework.

24. Define a Histogram Chart?

A histogram chart shows the distribution of continuous information over a certain period of time. This chart helps us to find extreme points, gaps, unusual values, and more concentrated values.

25. What are the File Size Limitations with Tableau?

In Tableau, there are no limitations with the file sizes. And there is no row or column limit to import the data.

26. What is Tableau Reader?

Tableau Reader is a free desktop application, where you can read and interact with the Tableau packaged workbooks.

It can only open the files but cannot create new connections to the workbook.

Tableau Interview Questions

27. What is the difference between Published Data and Embedded Data Sources?

The published data source contains connection information that is independent of workbooks and can be used by multiple workbooks.

The embedded data source contains connection information, but they associate it with the workbooks.

28. What is the Hierarchy in Tableau?

When we are working with large volumes of data, incredibly data may be messed up.

With Tableau, you can easily create hierarchies to keep your data neat.

Even if you don’t need it, it is built into your data, which you can easily manage or organize the data and you can track the data easily.

READ ALSO!!!      

Tableau Interview Questions

29. What is a Column Chart?

A column chat visualizes the data as a set of rectangle columns, as their lengths are proportional to values when they represent the data. The horizontal axis shows the category to which they belong, and the vertical axis shows the values.

30. What is the Bar Chart in Tableau?

The bar chart visualizes the data as a set of rectangle bars, as their values are proportional to lengths when they represent the data. The vertical axis shows the category to which they belong and the horizontal axis shows the values. So, the bar chart is a vertical version of the Column chart.

31. What is the Line Chart?

The line chart is a popular type of diagrammatic way for visualizing the data, it connects the individual data points to view the data. We can easily visualize the series of values, we can see trends over time or predict future values. The horizontal axis holds the category to which it belongs and the vertical axis holds the values.

32. What is a Stacked Bar chart?

Stacked Bar Chart, composed of multiple bars stacked horizontally, one below the other. The length of the bar depends on the value in the data point. A stacked bar chart makes the work easier, they will help us know the changes in all variables presented, side by side. We can watch the changes in their total and forecast future values.

Tableau Developer Interview Questions and Answers

33. What is a Stacked Column Chart?

Stacked Column Chart, composed of multiple bars stacked vertically, one on another. The length of the bar depends on the value in the data point. A stacked column chart is the best one to know the changes in all variables. This type of chart should be checked when the number of series is higher than two.

34. What is an Area Chart?

An area chart is nothing but line chat, the area between the x-axis and lines will be colour or patterns. These charts are typically used to represent accumulated totals over time and are the conventional way to display stacked lines.

35. What are the Products Offered by Tableau? Explain a Few things about them.

Tableau has 4 main products.

Tableau Prep: Tableau Prep prepares data for analysis. This tool provides 3 coordinated views which provide us with a complete picture of data.

Tableau Desktop: Tableau Desktop is the place where the analysis happens. It has a powerful drag and drops analytics which is very easy to use. Through the desktop, you get your data insights quickly.

Tableau Online: Tableau Online is a secure and scalable self-service analytics could tool. You can use it anywhere, anytime and it has eliminated the complexities of IT.

Tableau Server: From small to large enterprises, Tableau server is used for fulfilling their BI requirements. This is an on-premise solution. This tool can take data from anywhere and shared it across the organization through desktop or mobile browsers.

Tableau Interview Questions

Tableau Visualization Examples

36. Differentiate Parameters and Filters in Tableau

Filters are the simpler and more straightforward feature in Tableau. It applies to dimensions or measures directly.

For example, to only show Gujarat or Karnataka in a State dimension, we can apply the filter on that.

In Tableau, there are multiple UI options available for filters like radio buttons, drop-down lists, checkboxes, sliders, and more. Filters on sheets are also available in Tableau.

Parameters are like variables. They are complex and more powerful. Like a variable, they can use a parameter in calculations. So, that means, it only allows a single value.

Parameters have the same UI options except for checkboxes because checkboxes don’t have a single value.

For example, we can create a parameter for interest rate and period, and then we can use these parameters to calculate interest and principal payments.

READ ALSO!!!

Tableau Architecture Questions 

37. Explain How Many Types of Filters are available in Tableau?

Filters are used to provide the correct information to viewers after removing unnecessary data. There are various types of filters available in Tableau.

Extract Filters–Extract filters are used to apply filters on extracted data from the data source. For this filter, data is extracted from the data source and placed into the Tableau data repository.

Data source Filters–Datasource filters are the same as extract filters. They also work on the extracted dataset. But, the only difference is it works with both live and extract connections.

Context Filters–Context Filters are applied on the data rows before any other filters. They are limited to views, but we can apply them on selected sheets. They define Aggregation and Disaggregation of data in Tableau.

Dimension Filters–Dimension filters are used to apply filters on dimensions in worksheets. Dimension filters are applied through the top or bottom conditions, formula, and wildcard match.

Measure Filters–Measure filters are applied to the values present in the measures.

38. Differentiate between Tiled and Floating in Dashboards?

In a tiled layout, items don’t overlap. The layout will be adjusted according to dashboard size. In the floating layout, items can be placed on some other layers. Floating items can have fixed positions and sizes.

39. What is VIZQL in Tableau?

VIZQL is Visual Inquiry Language. It is a combination of VIZ and SQL. It is similar to SQL language. But instead of SQL commands, the VIZQL language converts data queries into visual images.

Expert Level Tableau Questions

40. Explain the Disaggregation and Aggregation of Data in Tableau?

Aggregation → summarizing the data and viewing a single numeric value is called aggregation. Example–sum/avg of salary for each employee.

Disaggregation → viewing each transaction for analyzing all the measures both dependently and independently. Example–individual salary transactions for each employee.

41. State the Components of the Dashboard?

The dashboard comprises 5 components.

Web: It comprises a web page embedded in the dashboard.

Horizontal Component: It is a horizontal layout container in which we can add objects.

Vertical Component: It is a vertical layout container in which we can add objects.

Image Extract: It allows you to upload an image to the dashboard from a computer.

Text: It is a small WordPad where we can format and edit the text. “Tableau Interview Questions”

42. Differentiate Discrete and Continuous Data Roles in Tableau

Discrete data roles comprise values that are separate and distinct. Discrete data roles can take individual values within a range.

For Example–cancer patients in the hospital, no. of threads in a sheet, state. Discrete values are displayed as blue icons in the data window and blue pills on shelves. Discrete fields can be sorted.

Continuous data roles consist of any value within the finite or infinite intervals. For Example–age, unit price, order quantity. Continuous values are displayed as green icons in the data window and green pills on shelves. Continuous fields cannot be sorted.

READ ALSO:

Intellectual Tableau Questions

43. What is the Difference between Traditional BI Tools and Tableau?

Traditional BI has hardware limitations. Tableau does not have dependencies.

It does not support in-memory, multi-thread, and multi-core computing. Tableau supports memory when using advanced technologies.

Also, it has a pre-defined view of data that uses predictive analysis for various business operations. We should need a good knowledge of BI and skills.

Has easy working and they do not provide understanding without the knowledge of BI and the skills data security is provided data security for the public, whereas in the professional version.

44. Are there any Limitations of Parameters in Tableau? If yes, give details.

Tableau dashboard allows the representation of parameters in four ways only. They don’t allow any multiple values like a filter can do. They only allow a single value.

45. State Some Reasons for the Low Performance of Tableau? Explain.

The following are the reasons for low performance:

Filters – filters need to create an extra query and if it is used in large numbers and inefficiently, then they can reduce the performance. So, it is advised to use filters whenever it is mandatory.

Live Connection – Tableau extract works much better in comparison with a live connection.

Data Sources – a wrong query to a wrong data source can reduce performance. Also, the data source’s performance can also affect Tableau’s performance.

46. Which one is Better? Extract or Live Connection?

Extract connection is better than live connection because extract connection can be used from anywhere, anytime without connecting to the database. We can construct our own visualizations on it irrespective of the database connection.

Tableau

Tableau Scenario Based Questions

47. Tell me Something about the Workbook Version Controlled in Tableau.

Versioning of workbooks can be done in 2 ways in Tableau.

At the desktop level, you keep copies of your changes and files or use 3rd party system like Microsoft TFS.

At the server level, where you publish the data source and version will be saved in revision history on Tableau Server or Online. Reverting to a previous version is also possible here.

48. Where can we Apply Global Filters?

Global filters can be applied to sheets, stories, and dashboards.

49. How to Add Custom Colour to Tableau?

To add custom colour in Tableau, we need to follow 3 steps

Generate custom colour code and create it in “Preferences. tps”

Navigate to Documents→ My Table Repository→ Preferences. tps

Add a note for custom colour code

50. Can we Create Cascading filters without using Context Filters?

Cascading filters means filter2 values are dependent on filter1 values.

For Example, filter1 is country and if we select “India” for filter1, filter2 values should show all Indian states. This feature we can achieve by using the option “Only Relevant Values”.

51. How can we Display the top and bottom 5 of records in a Single Tableau View?

To achieve this, we need to create 2 views

View1 which contains the top 5 records

View2 which contains the bottom 5 records

View3 which is a join of View1 and View2

52. Do we have any Data Limitations in Tableau Public?

Yes, Tableau Public can only allow 10 million rows to users for data visualization.

53. What is the Benefit of the Tableau Extract file over the live connection?

Extract files can be used without any connections and you can build your own visualization without connecting to the database.

READ ALSO!!!

Logical Tableau Questions

54. How many Tables joined are Possible in Tableau?

We can join 32 tables in Tableau. “Tableau Interview Questions”

55. Can we place an excel file in a Shared Location and use it to develop a report and refresh it in regular intervals?

Yes, we can place an excel file in a shared location and we can use it to develop a report, but for better performance, we need to extract the file.

56. How Do we do Testing in Tableau?

Yes, we can do testing in Tableau by using tools and the easiest way is using the desktop application. We need to check it before we publish it on the Tableau server.

57. Can you Get Values from two Different Sources as a Single Input into a Parameter?

Tableau, currently not supporting the multi-valued parameters. As Tableau parameters are not dynamic, we cannot filter the list of values at runtime.

58. How Can you set Permissions or Protect the Data in Tableau Public?

Tableau does not have any security permissions or to protect the data in Tableau public. Whatever we shared in Tableau public those files, workbooks can be viewed by all users. There is no security option in Tableau public.

Tactical Tableau Questions

59. If I Delete a workbook from tableau public and there are links to other blogs and other web locations. What happens to them?

Tableau public is like a repository, if you delete anything in the Tableau public the data will be lost, even if links are in other locations and blogs. We cannot access those links.

60. Mention Whether you Can Create Relational Joins in Tableau Without Creating a New Table?

Yes, we can create relational joins in Tableau without creating a new table

61. When Publishing Workbooks on Tableau online, sometimes an error about needing to extract appears. Why does it happen Occasionally?

It happens when the user is trying to publish the workbook which is connected to the internal or local server which means the company’s network.

62. Can Parameters have a Drop-down List?

Yes, Parameters have their own drop-down list, which enables the users to view the data entries which are available in the parameter during the creation.

63. Can Tableau be Installed on macOS?

Yes, Tableau can be installed on both the Windows Operating system and macOS.

64. How to Automate Reports in Tableau?

When we are publishing the reports to Tableau Server, there we will find an option to schedule the report, just select the time when you want to refresh the data.

Tableau Questions

Theoretical Tableau Questions

65. Which Databases give the Best Performance when Connected Live?

Native Database gives the best performance when connected live. “Tableau Interview Questions

66. State Limitation of Context Filters in Tableau

Whenever we set a context filter, Tableau generates a temp table that needs to refresh each and every time the view is triggered. So, if the context filter will be changed, the database needs to recompute and rewrite the temp table, which in turn slows down the performance.

67. What is a Marks Card in Tableau?

There is a card to the left of the view where we can drag fields and control mark properties like color, size, type, shape, detail, label, and tooltip.

68. Define a Published Data Source

The published data source has connection information in it. It is independent of any workbook and can be accessed by multiple workbooks.

69. Define Blended Axis

Multiple measures can share a single axis so that all the marks will be shown in a single pane. We can blend measures by dragging the 1st measure on one axis and the 2nd on the existing axis.

70. Can we Remove the “All” option from the auto-filter in Tableau?

Yes, we can. Navigate to filter→ Right-click on it→ select customize→ uncheck the option “Show All”

71. Define Bullet Graph

A bullet graph is a variant of a Bar graph. It is responsible for comparing the performance of one measure with other measures.

72. Define Gantt Chart

Gantt Chart displays the progress of value over the period. It consists of bars along with the time axis. It is a project management tool. Here, each bar is a measure of a task in the project framework.

READ ALSO:

Creative Questions

73. Define Histogram Chart

A histogram chart shows the distribution of continuous information over a certain period of time. This chart helps us to find extreme points, gaps, unusual values, and more concentrated values.

74. What is the Difference Between Joining and Blending?

Combining the data from two or more different sources is data blending, such as Oracle, Excel, and SQL Server. In data blending, each data source contains its own set of dimensions and measures.

Combining the data between two or more tables or sheets within the same data source is data joining. All the combined tables or sheets contain a common set of dimensions and measures.

75. What is the Difference Between. twbx And. twb?

This is one of the most frequently asked Tableau interview questions, and you must answer this one in detail.

. twbx

The. twbx contains all the information to build the visualization along with the data source. This is called a packaged workbook, and it compresses the package of files altogether. “Tableau Interview Questions”

. twb

The. twb contains instructions about how to interact with the data source. When it’s building a visualization, Tableau will look at the data source and then build the visualization with an extract. It can’t be shared alone as it contains only instructions, and the data source needs to be attached separately.

Impressive Questions

76. How Do You Handle Null and Other Special Values?

If the field contains null values or if there are zeros or negative values on a logarithmic axis, Tableau cannot plot them. Tableau displays an indicator in the lower right corner of the view, and you can click the indicator and choose from the following options:

Filter Data

Excludes the null values from the visualization using a filter. In that case, the null values are also excluded from any calculations used in the view.

Show Data at Default Position

Shows the data at a default location on the axis.

77. How Many Maximum Tables can you Join in Tableau?

You can join a maximum of 32 tables in Tableau.

78. What are Shelves?

They are Named areas to the left and top of the view. You build views by placing fields onto the shelves. Some shelves are available only when you select certain mark types.

79. What is a Hierarchical Field?

A hierarchical field in tableau is used for drilling down data. It means viewing your data in a more granular level.

80. Mention whether you can create relational joins in Tableau without creating a new table?

Yes, one can create relational joins in tableau without creating a new table.

81. How to Automate Reports?

You need to publish reports to the tableau server while publishing you will find one option to schedule reports. You just need to select the time when you want to refresh data.

82. What is Assume Referential Integrity?

Sometimes, you can improve query performance by selecting the option to Assume Referential Integrity from the Data menu.

When you use this option, Tableau will include the joined table in the query only if it is specifically referenced by fields in the view.

Tableau questions

Tableau Desktop Questions

83. Explain when would you use Joins vs. Blending in Tableau?

If data resides in a single source, it is always desirable to use Joins. When your data is not in one place blending is the most viable way to create a left join like the connection between your primary and secondary data sources.

84. What is default Data Blending Join?

Data blending is the ability to bring data from multiple data sources into one Tableau view, without the need for any special coding.

A default blend is equivalent to a left outer join. However, by switching which data source is primary, or by filtering nulls, it is possible to emulate left, right and inner joins.

85. What is the DRIVE Program Methodology?

Tableau Drive is a methodology for scaling out self-service analytics. Drive is based on best practices from successful enterprise deployments.

The methodology relies on iterative, agile methods that are faster and more effective than traditional long-cycle deployment.

A cornerstone of this approach is a new model of partnership between business and IT.

86. Is Tableau Software Good for Strategic Acquisition?

Yes! For sure. It gives you data insight if other tools can’t. Moreover, it also helps you to plan and point the anomalies and improvise your process for the betterment of your company.

87. Can we place an excel file in a shared location and use it to develop a report and refresh it in regular intervals?

Yes, we can do it. But for better performance, we should use Extract.

88. Can Tableau be Installed on MacOS?

Yes, Tableau Desktop can be installed on both Mac and Windows Operating systems.

Tableau Data Analytics

89. What is the Difference Between the Quick filter and the Normal Filter in Tableau?

Quick filter is used to view the filtering options and can be used to select options. Whereas, the Normal filer is something with which we can limit the options from the list or use some conditions to limit the data by field or value.

90. What is Tableau Desktop?

Tableau Desktop is based on breakthrough technology from Stanford University that lets us drag and drop to analyze data.

It is a great data visualization tool, with which we can connect to data in a few clicks, then visualize and create interactive dashboards with a few more clicks.

91. How to Automate Reports in Tableau?

We will see the option to schedule reports when uploading a report on Tableau Server. We can click on this button to set the time to refresh the data.

92. What is the Difference Between INDEX and RANK in Tableau?

RANK and INDEX come under table calculations in Tableau. INDEX mainly deals with a record’s physical position. Incremental numbers are assigned according to the record’s physical order.

Index

Whereas, RANK deals with a record’s value. The highest value gets the highest rank and the lowest value gets the lowest rank.

93. Does a Parameter have its own drop-down List?

Yes, it may have its own drop-down list. The entries we make in the Parameter while creating it can be viewed as items in the drop-down list.

94. What is a Page Shelf?

Page shelf is a powerful part of Tableau that we can use to control the display of the output and the printed results of the output. “Tableau Interview Questions”

READ ALSO:

Tableau Demo Questions

95. How does Tableau Work with Huge Datasets?

Tableau’s performance is based on the performance of the data source. If the data source takes more time to execute a query, then Tableau must wait up to that time.

96. What is Data Modelling?

This question is present in any of the Tableau interview questions blogs. Get an idea on this.

Data modelling is the analysis of data objects that are used in a business or other context and the identification of the relationships among these data objects.

Data modelling is the first step in performing object-oriented programming.

97. How can we combine a Database and the flat file data in Tableau Desktop?

Connect data twice, once for database tables and then for the flat file. The Data->Edit Relationships.

Give a Join condition on the common column from DB tables to the flat file

98. How to Display the Top Five and the Last Five Sales in the Same View?

Using filters or calculated fields, we can display the top five and the last 5 sales in the same view.

99. Is Tableau Good for a Strategic Acquisition?

Yes, for sure! It gives us data insights much more than the others. It helps us plan and point out the anomalies and improvise our process for betterment.

100. How Do we do Testing in Tableau?

We can’t perform testing in Tableau. It is a data visualization software. “Tableau Interview Questions”

101. What are Dimensions and Facts?

Dimensions are nothing but descriptive text columns. Example: product name, city, etc.

Facts are the measures (numerical values). Example: sales, profit, etc.

Tableau

Tableau Business Intelligence

102. How to Create a .tde File in Tableau?

To create a Tableau Data Extract (.tde) file we have to,

Go to the Data tab present on the top left of the Tableau toolbar.

Select a data source.

Click on the Extract Data option.

Then, either select fields from the data source or just click on Extract to create a data extract file (.tde) of the entire data set from the data source.

103. What do you Understand by Data Extracts in Tableau?

The data extracts are also called the subsets of data that we extract from the main data source.

Using data extracts optimizes Tableau’s performance, speed and offers flexibility to handle large sets of data easily.

A local copy of that portion of data gets saved in Tableau’s memory when we create a data extract.

Working and managing data in the form of such extracts is much easier than having to manage the entire data from a live connection as extracts are saved offline in Tableau’s memory.

104. What is Tableau Public?

Tableau Public is a free service that allows anyone to publish interactive data to the web.

Once it is on the web, anyone can interact with the data, download it, or create their own data visualization.

105. What is the Basic Difference between Published Data Sources and Embedded Data Sources in Tableau?

The basic difference between a published data source and an embedded data source is:

The public data source contains connection information that is independent of any workbook. On the other hand, embedded data source connection information is associated with a workbook.

106. Explain Tableau Data Extract

A Tableau data extract is a compressed snapshot of data stored on a disk. It is loaded into memory to render a Tableau.

Additional Tricky Tableau Questions

107. What are the Different Data Types in Tableau?

Tableau identifies and categorizes the incoming data in various categories of data.

The different data types available in Tableau are:

String values (Text): This data type comprises zero or more characters.

The string values have the characters enclosed in a single or double quote (as known as single or double inverted commas).

Integer values (Numbers): The values of this data type can be an integer type or floating type numbers. It is a numeric data type.

Date & Time Values: This data type comprises date and time values in different formats such as mm-dd-yyyy, etc. for date and hr:min:sec for time.

Tableau also has a separate Date data type which contains only the data values of different types like a year, month, quarter, week, day, etc.

Boolean values (True or False; relational): The values of this data type are as True and False is a result of relational calculations.

Therefore, boolean values are also known as logical values.

Geographic values (Region, Postal code, etc): The data values of this data type are those which are used in a map.

It consists of values related to the country name, state name, city, region, postal codes, etc that belong to the geography of a region.

A globe icon denotes this data type.

Cluster group or mixed values: This data type is assigned to the fields having values of more than one data type.

108. Explain Connect Live

Connect live creates a direct connection to the data source and speeds up access.

READ ALSO:

Tableau Assessment Questions

109. Define the term Analytics Pane Concerning Tableau

The analytics pane offers quick and easy access to everyday analytic objects in Tableau. It allows you to drag forecasts, reference and trend lines, and other objects into your view from the Analytics pane.

110. Explain the Term Filter Actions

Filter actions show related information between a source sheet and one or more target sheets. This type of activities best suited when a developer is building a guided logical path using a workbook or in a dashboard.

111. Where can a Developer Use Global Filter?

A developer can use global filters in sheets, dashboards, and stories.

112. How to Get the Current Date and Time in Tableau?

A developer can get the current date and time in Tableau using the NOW() function.

113. What is Forecasting in Tableau?

Forecasting means predicting the future value of a measure. There are various methods for forecasting. However, in Tableau, the user can only use exponential smoothing.

114. What is the Calculated Field in Tableau?

A calculated field is a new field that you can create using a formula to modify the existing filed in your data source.

115. How can you Perform Load Testing in Tableau?

Users can do load testing with the help of Tableau Server performance testing solution called TabJolt.

However, this is third-party software that is not supported by tableau directly. Therefore, it may be installed using other open-source products.

116. Explain Longitude and Latitude in Tableau

Longitude and Latitude (generated) fields are associated with the geographical detail present in the data. The dataset should consist of geographic information like City, Country, or State.

The longitude and latitude values are auto-generated in Tableau. These fields can be used to build maps in Tableau.

Practical Interview Questions

117. What are Joins?

Tableau can “join” tables. It can join up to 32 tablets in a data source. Two or more tables can be specified while joining the relationship.

The tables present in the data source can be related to each other using the joins such as inner join, left join, right join, and outer join.

118. Can you Convert a String type column into a number type column?

No, it is not possible to convert a string type column into a number type column. When you do this, all the values would change to null.

119. How Can You Sort a Particular Column in a Table?

Every column has these three lines. When you click on that, you can either sort that in ascending order or descending order.

120. How Can you Get More Information about a Particular Column?

Every column gives you the description option. When you click on the described button, you will get more information about that column.

121. How Can you Hide a Column from a Table?

When you hover the mouse over the name of a column, you will get a triangle symbol.

When you click the triangle symbol, you will have a lot of options over there. One of those options is ‘hide’. When you click on this, the column can be hidden.

122. How Can you Rename a Column in a Table?

You can just double click the name of the column and give in the new name over there.

Tableau Calculation Questions

123. What Do you Understand by Pivoting in Tableau?

There would be a lot of issues with raw data. Sometimes, we might have data in a wide format instead of a long format. If we would want to convert this wide form data into long-form data, we can use pivot.

124. What Do you Understand by Full join in Tableau?

With the help of the left join, we can combine two tables, where we will get all the records from the right table and also all the records from the left table.

125. What is a Box plot?

With the help of a box plot, you can understand the relationship between a categorical variable and a numerical variable.

126. How can you Load a PDF file in Tableau?

On the main page, you would have the “connect to” pane on the left side. From there, you can select “PDF File”

127. How can you Load an Excel File in Tableau?

On the main page, you would have the “connect to” pane on the left side. From there, you can select “Microsoft Excel”

128. What is a Scatterplot?

A scatter plot is a visual representation with the help of which we can understand the relation between two continuous variables.

129. What is Bar-plot?

A bar-plot is a pictorial representation with the help of which we can understand the distribution of categorical variables.

130. How to Show Axis in Tableau?

You can show and hide the axis based on your requirements.

Right-click on the axis and deselect the show header to hide the axis. To show the axis right-click on the fields in row or column and select show header to bring back the hidden axis.

READ ALSO:

Tableau Admin Interview Questions

131. What is the Minimum Version of Android OS required to Run Tableau Mobile?

Tableau mobile can be run on devices with android 7 or higher versions. Tableau mobile is used to view visualizations created on tableau desktop, tableau server, tableau online.

132. What is an Embedded Data Source? How is it different from a Published Data Source?

An embedded data source contains information that is connected to a workbook. A published data source works independently.

133. What are the Different Types of Authentication in Tableau?

There are two ways that authentication may be carried out in Tableau. These are local authentication and active directory.

134. What are Groups in Tableau?

Groups are created to visualize larger memberships using dimensions. Groups can create their own fields to categorize values in that specific dimension.

135. What are Dual Axes?

Dual axes are used to analyze two different measures at two different scales in the same graph. This lets you compare multiple attributes on one graph with two independent axes layered one above the other.

To add a measure as a dual-axis, drag the field to the right side of the view and drop it when you see a black dashed line appear.

You can also right-click (control-click on Mac) the measure on the Columns or Rows shelf and select Dual Axis.

136. What is Assume Referential Integrity?

In some cases, you can improve query performance by selecting the option to Assume Referential Integrity from the Data menu.

When you use this option, Tableau will include the joined table in the query only if it is specifically referenced by fields in the view.

Interview Questions for Experienced Professionals

137. What is a TDE File?

TDE is Tableau Desktop Extension with extension .tde. This file points to a file that contains data from external sources like MS Excel, MS Access, or CSV files. It makes it easier to analyze and discover data.

138. What Do you Understand by Inner Join in Tableau?

With the help of inner join, we can combine two tables where the resultant table is a combination of common records of both the tables

139. What is the User Filter?

User filter secures the row-level data present in a dataset. They can use it when publishing the workbook on a server. Different filter conditions can be applied to different users.

140. What are the User Functions in Tableau?

The user functions in Tableau are unique functions that Tableau developers can use to perform operations on the registered users on Tableau Online or Tableau Server. 

141. Explain Paged Workbook

A paged workbook in Tableau comprises different pages based on specific criteria.

142. Explain Bin

Bin is a user-defined set of data that are of the equal interval that stores data values according to or which fits in bin size.

143. Explain Bubble Chart

A bubble chart visualizes the measures and dimensions in the form of bubbles. The sizes of the bubbles determine the size of the measured value for effective visualization. The colour of bubbles can be set to differentiate the members present in a dimension.

Tricky Questions

144. Define Hyper

Hyper is a high-performance in-memory information engine innovation. It allows clients to analyze complex or large informational sets more speedier. This can be done by proficiently assessing analytically questions that are in the value-based database.

145. What are the Combined Sets?

The combined Sets in Tableau are handy to compare two existing sets for further analysis. “Tableau Interview Questions”

146. What is Backgrounder?

The backgrounder refreshes planned extracts, conveys notifications, and handles other assignments run in the background. The backgrounder expands as much as the processor is accessible to finish the background action as fast as possible.

147. Explain Data Visualization

Data visualization is one form of visual communication. It includes producing images that communicate relationships among the data. This process can be achieved using a systematic mapping between data values and graphic marks.

148. What is Aggregation?

Aggregation is viewing measures or numeric values at higher and more summarized data.

149. Why use Disaggregation in Tableau?

Disaggregation is a Tableau used to view every row of the data source. It is useful while analyzing measures for both independent and dependent data in the view.

150. What is the Tableau Data Engine?

Tableau data engine opens, refreshes, creates, and queries extracts of the user.

We could fail despite our extensive preparation and hard work for the Tableau interview.

It’s simply the truth. It is possible that it has nothing to do with our skills or how we performed in the interview, but that other external factors over which we have no control may influence the decision.

Don’t be too concerned about the outcome; instead, put forth your best efforts and work hard. Don’t forget to share this content with your friends!

CSN Team.

APPLY NOW 👉 WORK IN CANADA WITH FREE SPONSORSHIP!


 

    Hey You!

    Don't Miss These Opportunity! Enter Your Details Below!


    => FOLLOW US ON INSTAGRAM | FACEBOOK & TWITTER FOR LATEST UPDATE

    Tags: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,

    Comments are closed.

    %d bloggers like this: