Table of contents
1.
Introduction
2.
Tableau Interview Questions for Freshers
2.1.
1. What is TABLEAU?
2.2.
2. What is data visualization?
2.3.
3. Define LOD Expression?
2.4.
4. Define Heat Map?
2.5.
5. Define TreeMap?
2.6.
6. What is the distinction between a Heat map and Treemap?
2.7.
7. What is a boundary Tableau and how does it work?
2.8.
8. Give a concise about the scene dashboard?
2.9.
9. Define Page Shelf in Tableau.
2.10.
10.  How is the Context Filter not quite the same as different Filters?
2.11.
11. What is a Tableau Dashboard?
2.12.
12. How can you create a trend line in Tableau?
2.13.
13. What are the different types of data connections available in Tableau?
2.14.
14. What are the main products offered by Tableau?
2.15.
15. What are Filters in Tableau?
2.16.
16. What is a worksheet in Tableau?
2.17.
17. What is a calculated field in Tableau?
2.18.
18. How do you create a calculated field in Tableau?
2.19.
19. What is the difference between dimensions and measures in Tableau?
2.20.
20. What is a Story in Tableau?
2.21.
21. What is a parameter in Tableau?
2.22.
22. What is a Dual Axis in Tableau?
2.23.
23. What are the different types of joins in Tableau?
2.24.
24. How do you use a Join in Tableau?
2.25.
25. What is the purpose of the Marks card in Tableau?
2.26.
26. What is Aggregation in Tableau?
2.27.
27. How do you create groups in Tableau?
2.28.
28. What is a Bins in Tableau?
2.29.
29. What is the difference between discrete and continuous fields in Tableau?
2.30.
30. How do you create a hierarchy in Tableau?
3.
Tableau Interview Questions for Intermediates
3.1.
31. What impedes Context Filters?
3.2.
32. What are the five primary items presented by Tableau?
3.3.
33. Why should we use Tableau?
3.4.
34. What are the different types of charts available in Tableau?
3.5.
35. How can you perform data aggregation in Tableau?
3.6.
36. What is the Rank Function in Tableau?
3.7.
37. State some ways to improve the performance of Tableau.
3.8.
38. What is Tableau Public?
3.9.
39.  Express the distinction between .twbx and .twb augmentations.
3.10.
40. Characterize Tableau Products.
3.11.
41. What are Sets in Tableau, and how do you create them?
3.12.
42. What is the difference between FIXED, INCLUDE, and EXCLUDE in LOD expressions?
3.13.
43. What is the difference between a Live Connection and an Extract in Tableau?
3.14.
44. How do you perform a drill-down in Tableau?
3.15.
45. How do you create a box plot in Tableau?
3.16.
46. How do you optimize Tableau performance?
3.17.
47. What is the difference between context filters and normal filters in Tableau?
3.18.
48. What is the difference between Join and Data Blending in Tableau?
3.19.
49. How can you create a cascading filter in Tableau?
3.20.
50. How do you handle outliers in Tableau?
3.21.
51. How do you handle null values in Tableau?
3.22.
52. What is the difference between a Data Extract (.hyper) and a Tableau Workbook (.twbx)?
3.23.
53. What is the difference between primary and secondary axes in a dual-axis chart?
3.24.
54. What are Reference Lines in Tableau?
3.25.
55. What is the purpose of the Data Source page in Tableau?
3.26.
56. What is the difference between blue and green pills in Tableau?
3.27.
57. How do you create a custom date format in Tableau?
3.28.
58. What is the difference between ATTR and MIN/MAX functions in Tableau?
3.29.
59. How do you create a combined axis chart in Tableau?
3.30.
60. What is the purpose of the Analytics pane in Tableau?
4.
Tableau Interview Questions for Experienced
4.1.
61. Express the contrast between Tableau Reader and Tableau online by characterizing them in a word.
4.2.
62. What precisely is implied by the term 'Aspects'?
4.3.
63. What are the limitations in Tableau?
4.4.
64. What number of max tables could we at any point participate in Tableau?
4.5.
65. How to plan for a Tableau interview?
4.6.
66. What is Lod in Tableau?
4.7.
67. What number of channels are there in Tableau?
4.8.
68. Explain the concept of data blending in Tableau. When and why would we use it?
4.9.
69. Explain the concept of data scaffolding in Tableau and how it can benefit your analysis.
4.10.
70. Describe the process of creating a parameter-driven advanced analytics model in Tableau. 
4.11.
71. How do you implement Row Level Security (RLS) in Tableau?
4.12.
72. How can you optimize query performance in Tableau when working with large datasets?
4.13.
73. How do you implement Conditional Formatting in Tableau?
4.14.
74. Explain the concept of query fusion in Tableau and how it impacts performance.
4.15.
75. How do you optimize Tableau Extracts?
4.16.
76. Describe the process of creating a custom SQL query in Tableau.
4.17.
77. What is a Tableau Data Source Certification, and why is it important?
4.18.
78. Explain the concept of data densification in Tableau and provide an example of when you might use it.
4.19.
79. What is a Hyper File in Tableau, and how does it differ from TDE?
4.20.
80. How would you approach creating a complex dashboard with multiple levels of interactivity and drill-down capabilities?
4.21.
81. How do you handle multi-tenancy in Tableau?
4.22.
82. How can you use Level of Detail (LOD) expressions to solve the parallel period comparison problem?
4.23.
83. What is the importance of Tableau Metadata API, and how can you use it?
4.24.
84. How would you implement a dynamic axis in Tableau that changes based on user selection?
4.25.
85. How do you handle real-time streaming data in Tableau?
4.26.
86. How can you use set actions to create advanced interactivity in Tableau dashboards?
4.27.
87. How would you use Tableau with a NoSQL database?
4.28.
88. Describe the process of creating a custom map projection in Tableau.
4.29.
89. How do you set up a Tableau Server cluster for high availability?
4.30.
90. Describe the process of creating a custom polygon map in Tableau using spatial files.
5.
Tableau MCQ Questions
5.1.
1. Which of the following is a file extension for a Tableau packaged workbook?
5.2.
2. What is the purpose of the Pages shelf in Tableau?
5.3.
3. Which function in Tableau is used to calculate the cumulative sum?
5.4.
4. In Tableau, which of the following is used to limit the number of data points displayed?
5.5.
5. What type of join returns all the records from both tables and fills in NULLs where there are no matches?
5.6.
6. Which Tableau feature allows you to highlight a subset of your data while still displaying the whole data set?
5.7.
7. What is the primary use of Tableau Extract files (.hyper)?
5.8.
8. Which of the following features in Tableau allows users to click on an item in a view to filter the dashboard?
5.9.
9. What does the Tableau function DATETRUNC() do?
5.10.
10. Which of the following best describes a Dimension in Tableau?
6.
Frequently Asked Questions
6.1.
How do I prepare for a Tableau interview? 
6.2.
What are the three types of Tableau? 
6.3.
How do you explain a dashboard in a Tableau interview? 
6.4.
How is Tableau used? 
7.
Conclusion
Last Updated: Sep 8, 2024
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Top 100 Tableau Interview Questions

Author Adya Tiwari
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Introduction

Tableau is the primary data visualization instrument for data examination and business insight. Gartner's Magic Quadrant grouped Tableau as an investigation and business knowledge pioneer. Tableau is one more term for a data table, especially: Cryptographic tableau, or tabula recta, utilized in manual code frameworks: division tableau, a table used to do long division. 

This article includes the top Tableau Interview Questions in three levels to help you ace your following interview. Here is a comprehensive set of Tableau interview questions and answers, categorized into freshers, intermediate, experienced, and scenario-based levels.

  • Tableau Interview Questions for Freshers
  • Tableau Interview Questions for Intermediates
  • Tableau Interview Questions for Experienced
  • Tableau MCQ Questions

Tableau Interview Questions for Freshers

1. What is TABLEAU?

Tableau is the strongest and quickest picturing apparatus utilized in the Business Intelligence(BI) Industry. It works on the crude data into a suitable configuration. Investigation of the data turns out to be quicker with Tableau. The visualizations can be made as dashboards. The visualizations or diagrammatic portrayal of data can, without much of a stretch, be perceived by the representatives of the associations at various levels.

2. What is data visualization?

Data visualization implies the graphical portrayal of data or data. We can utilize visual items like diagrams, outlines, bars, etc. Data visualization devices give an open method for seeing and comprehending the data without any problem.

3. Define LOD Expression?

LOD Expression represents Level of Detail Expression and is utilized to run complex inquiries, including many aspects at the data obtaining level.

4. Define Heat Map?

An intensity map is a graphical portrayal of data that utilizes a variety of coding strategies to address various upsides of data. Dim types will be displayed on the guide as the imprints heat up because of their higher worth.

5. Define TreeMap?

TreeMap is a perception that sorts out information progressively and shows them as a bunch of settled square shapes. The size and shades of square shapes are separate from the upsides of the report focuses they project. Parent square shapes will be tiled with their youngster components.

6. What is the distinction between a Heat map and Treemap?

TreeMap addresses the information progressively and shows them as a bunch of settled square shapes. It handles the data graphically, utilizing numerous varieties to address various qualities. It is best suited for large, highly structured to show data contrasting the classifications, types, and sizes and can likewise be used to show the progressive information and part to real connections. 

On the other hand, a Heat map is a two-dimensional(2D) representation of simple and complex data with the help of colors. We primarily use heat maps to analyze consumer purchases pattern and behavior. We can also use heat maps for understanding the intensity of storms in a region, election results in an area, etc  

7. What is a boundary Tableau and how does it work?

Boundaries are dynamic qualities; we can supplant the steady rates in computations.

8. Give a concise about the scene dashboard?

A scene dashboard is a gathering of different perspectives which permits you to, at the same time, look at changed kinds of information. Datasheets and dashboards are associated, assuming any change happens to the information that is straightforwardly reflected in dashboards. It is the most productive way to deal with imagining the report and investigating it.

9. Define Page Shelf in Tableau.

Page rack breaks the perspectives into a progression of pages. It shows a substitute view on each page. Because of this element, you can dissect the impact of each field on the other information in the picture.

10.  How is the Context Filter not quite the same as different Filters?

Whenever we make a Context Filter, Tableau will make a transitory table for this specific Filter set. Different Filters will be applied to the Context Filter data, like outpouring boundaries.

Assume we have made a Context Filter on nations, USA and India. Tableau will create a temporary table for these two nations' data, and if we have some other Filters, others will be applied to these two nations' data on the off chance that we have no Context Filter; each record will check for all Filters.

11. What is a Tableau Dashboard?

A Tableau Dashboard is a collection of multiple views, allowing you to compare different data simultaneously. It helps create a consolidated and interactive presentation of data through visualizations, charts, and graphs.

12. How can you create a trend line in Tableau?

Right-click on the view and select "Trend Lines," then choose the type of trend line you want to add.

13. What are the different types of data connections available in Tableau?

Tableau offers two types of data connections:

  • Live Connection: Connects directly to the data source and fetches data in real-time.
  • Extract Connection: Pulls data from the data source and stores it locally in a static form for performance improvements.

14. What are the main products offered by Tableau?

Tableau offers several products, including Tableau Desktop, Tableau Server, Tableau Online, Tableau Public, and Tableau Prep.

15. What are Filters in Tableau?

Filters in Tableau allow users to view a subset of the entire dataset. By applying filters, users can exclude or include specific data points, focus on relevant data, and improve the visualization's clarity.

16. What is a worksheet in Tableau?

A worksheet in Tableau is a single sheet where you create a specific view of your data using drag and drop gestures.

17. What is a calculated field in Tableau?

A calculated field is a new field you create using existing fields and functions in your data source.

18. How do you create a calculated field in Tableau?

To create a calculated field in Tableau:

  • Click on the drop-down arrow in the data pane.
  • Select “Create Calculated Field.”
  • Define the calculation using the available functions and expressions.
  • Click “OK” to apply it.

19. What is the difference between dimensions and measures in Tableau?

Dimensions are qualitative data (like categories), while measures are quantitative data that can be measured and aggregated.

20. What is a Story in Tableau?

A Story in Tableau is a sequence of dashboards or sheets that work together to convey information. It helps to guide users through the data step-by-step, presenting a cohesive narrative.

21. What is a parameter in Tableau?

A parameter is a dynamic value that can replace a constant value in a calculation, filter, or reference line.

22. What is a Dual Axis in Tableau?

A Dual Axis in Tableau allows you to compare two measures on the same graph, using two axes (primary and secondary). It is used to plot two different types of data, such as sales and profit, on the same chart.

23. What are the different types of joins in Tableau?

Tableau supports Inner Join, Left Join, Right Join, and Full Outer Join.

24. How do you use a Join in Tableau?

In Tableau, a join is used to combine data from two or more tables based on a related column. The different types of joins available are Inner, Left, Right, and Full Outer Join.

25. What is the purpose of the Marks card in Tableau?

The Marks card controls the visual properties of your data points, such as color, size, shape, and labels.

26. What is Aggregation in Tableau?

Aggregation is the process of summarizing multiple values into a single value. In Tableau, it automatically aggregates measures such as sum, average, minimum, or maximum for better data analysis.

27. How do you create groups in Tableau?

Select the items you want to group, right-click, and select "Group."

28. What is a Bins in Tableau?

Bins in Tableau are used to create ranges or groups for continuous fields. Binning is useful for grouping data into intervals and analyzing the frequency of occurrences within each bin.

29. What is the difference between discrete and continuous fields in Tableau?

Discrete fields are shown as blue pills and create headers in the view. Continuous fields are shown as green pills and create axes in the view.

30. How do you create a hierarchy in Tableau?

To create a hierarchy in Tableau:

  • Drag and drop a field on top of another field in the data pane.
  • Tableau will automatically create a hierarchy that allows drill-down analysis in the visualization.

Tableau Interview Questions for Intermediates

31. What impedes Context Filters?

The client doesn't as often change the Context Filter as possible—if the Filter is changed, the database should be recomputed, and the transitory table must be revamped, easing back execution.

When we set an aspect to setting, Tableau makes a brief table that will require a reload each time the view is started. For Excel, Access, and text data sources, the impermanent table made is in an Access table arrangement. We should have consented to make a transitory table on our waiter for SQL Server, MySQL, and Oracle data sources. For a multi-faceted data source, or blocks, transitory tables are not made, and Context Filters characterize which Filters are free and which are reliant.

32. What are the five primary items presented by Tableau?

Tableau offers five essential items:

  • Tableau Desktop
  • Tableau Server
  • Tableau Online
  • Tableau Reader
  • Tableau Public

33. Why should we use Tableau?

There are many motivations to utilize Tableau. Whether our data is in an on-premise database, a database, a data distribution center, a cloud application, or an Excel record, we can break it down with Tableau. We can make perspectives on our data and offer them to associates, clients, and accomplices. We can utilize Tableau to mix it with different data and stay up-to-date.

34. What are the different types of charts available in Tableau?

Tableau provides different types of charts. These charts include:

  • Bar Chart
  • Line Chart
  • Pie Chart
  • Scatter Plot
  • Area Chart
  • Histogram
  • Gantt Chart
  • Bullet Chart
  • Box Plot
  • Packed Bubble Chart
  • Dual-Axis Chart
  • Map Chart
  • Heat Map
  • Tree Map
  • Radar Chart 

35. How can you perform data aggregation in Tableau?

To perform data aggregation in Tableau are:

  • Connect to the data source.
  • Drag dimensions and measures to Columns and Rows.
  • Choose a mark type like bar or line.
  • Group the data using categories or hierarchies.
  • Apply filters for specific data selection.
  • Sort data by measure or dimension.
  • Utilize aggregation functions such as SUM, AVG, etc.
  • Show grand totals or subtotals.
  • Consider Level of Detail (LOD) expressions for advanced aggregation.
  • Create calculated fields for custom aggregations.
  • Use pivot or split for data transformation.
  • Enable drill-down/up for interactive exploration.

36. What is the Rank Function in Tableau?

In Tableau, The Rank function assigns a rank to each data point based on a specified measure. It helps to understand the relative position of data points regarding their values and allows us to identify top performers, lowest values, and gaps in between. This function can help create leaderboards, analyze competitiveness, and spot outliers within your data set.

Learn more, Kotlin Interview Questions

37. State some ways to improve the performance of Tableau.

Some ways to improve Tableau's performance are: 

  • Use Data Extracts
  • Optimize Data Source
  • Filter Data
  • Upgrade Hardware
  • Scheduled Extract Refresh
  • Limit Rows and Columns
  • Use Parameters
  • Optimize Calculations
  • Dashboard Efficiency
  • Avoid Live Connections
  • Tableau Server Configuration

38. What is Tableau Public?

Scene Public is an open-source and free help that permits anybody to distribute the information source and representations to the web. These representations can then be installed into web journals or pages. They can likewise be conveyed through email or virtual entertainment. Additionally, they can be made downloadable by opposite-end clients. For Tableau Public, no programming abilities are required. It tends to be gotten to by anybody liberated from cost.

39.  Express the distinction between .twbx and .twb augmentations.

.twbx is a compressed chronicle that contains a .twb and any outer documents like the concentrates or the foundation pictures.

Then again, a .twb is an XML record containing all determinations and designs made to have the Tableau exercise manual. No different data is given here.

40. Characterize Tableau Products.

The Tableau Product family comprises a great many items. Underneath the reference is a finished rundown of it. Expressing the definition in a word, the rundown is as per the following:

  • Tableau Desktop: It is a data visualization self-administration business examination. Anybody can utilize it. It is fit for moving data pictures into a streamlined structure.
     
  • Tableau Server: It is a sort of Tableau programming in light of the endeavor level. With the Tableau Desktop, you will be equipped for distributing dashboards and could share them all through the specific organization(s) with a particular web-situated Tableau Server.
     
  • Tableau Online: The facilitated form of the Tableau Server is known as Tableau Online. It helps in upgrading business knowledge more quickly and consistently. It makes work faster and less complicated than you at any point thought.
     
  • Tableau Reader: Tableau Reader is an application liberated from cost in any work area. It helps clients in opening and reviewing the visualizations worked in Tableau Desktop.
     
  • Tableau Public: Tableau Public comes liberated from cost and is like Tableau Reader. The main contrast is you should save your exercise manual or the worksheets in the Tableau Server that can be seen by everybody.

41. What are Sets in Tableau, and how do you create them?

Sets in Tableau are custom fields that define a subset of data based on conditions. There are two ways to create sets:

  • Manual Set: Select members from a list.
  • Dynamic Set: Define rules for membership based on a condition.

42. What is the difference between FIXED, INCLUDE, and EXCLUDE in LOD expressions?

FIXED calculates the expression at the specified dimension level, ignoring view-level dimensions. INCLUDE adds dimensions to the view level of detail. EXCLUDE removes dimensions from the view level of detail.

43. What is the difference between a Live Connection and an Extract in Tableau?

A Live Connection directly connects to the data source and reflects real-time data. An Extract takes a snapshot of the data, which is stored locally, enhancing performance but not updating in real time.

44. How do you perform a drill-down in Tableau?

Drill-down in Tableau is done by creating hierarchies. When you click on a higher-level field in the hierarchy, you can drill down into the lower levels for more detailed data.

45. How do you create a box plot in Tableau?

Create a box plot by placing a dimension on the Columns shelf, a measure on the Rows shelf, then clicking on the measure pill and selecting "Box Plot" from the "Show Me" menu.

46. How do you optimize Tableau performance?

To optimize Tableau performance:

  • Use extracts instead of live connections.
  • Reduce data size with filters.
  • Limit the use of complex calculations.
  • Optimize joins and relationships.
  • Use indexing on the database side.

47. What is the difference between context filters and normal filters in Tableau?

Context filters are applied first and create a temporary table for other filters to work with, improving performance for complex views. Normal filters are applied simultaneously and can interact with each other.

48. What is the difference between Join and Data Blending in Tableau?

A Join combines data from the same source by merging tables based on a key field. Data Blending is used when the data comes from different sources and cannot be joined directly, blending the data based on a common field.

49. How can you create a cascading filter in Tableau?

Create cascading filters by setting up multiple filters and establishing a hierarchical relationship between them using the "Only Relevant Values" option in the filter dialog.

50. How do you handle outliers in Tableau?

To handle outliers in Tableau:

  • Use box plots to identify outliers.
  • Apply filters to exclude them.
  • Create calculated fields to flag or exclude outliers from the analysis.

51. How do you handle null values in Tableau?

Handle null values by using the IFNULL, ZN, or ISNULL functions, or by adjusting the table calculation settings to ignore null values.

52. What is the difference between a Data Extract (.hyper) and a Tableau Workbook (.twbx)?

A Data Extract (.hyper) is a compressed snapshot of the data for performance improvement, while a Tableau Workbook (.twbx) is a packaged file that includes the workbook and data, making it easy to share with others.

53. What is the difference between primary and secondary axes in a dual-axis chart?

The primary axis is on the left side of the chart, while the secondary axis is on the right. They allow you to plot measures with different scales on the same chart.

54. What are Reference Lines in Tableau?

Reference Lines are static or dynamic lines added to a visualization to indicate a particular value across the axis, helping users compare data against a specific benchmark, such as average, maximum, or constant values.

55. What is the purpose of the Data Source page in Tableau?

The Data Source page lets you connect to and prepare your data before analysis. You can join tables, create calculated fields, and adjust data type settings.

56. What is the difference between blue and green pills in Tableau?

Blue pills represent discrete fields (dimensions), while green pills represent continuous fields (measures). Discrete fields create headers, while continuous fields create axes.

57. How do you create a custom date format in Tableau?

To create a custom date format in Tableau:

  • Right-click on the date field.
  • Select “Format.”
  • Choose “Custom” in the date formatting options and define your format using date format symbols (e.g., yyyy-MM-dd).

58. What is the difference between ATTR and MIN/MAX functions in Tableau?

ATTR returns a single value if all values are the same or an asterisk (*) if there are multiple values. MIN and MAX always return a single value (the minimum or maximum).

59. How do you create a combined axis chart in Tableau?

Create a combined axis chart by placing multiple measures on the Rows shelf and selecting "Dual Axis" from the context menu of one of the measures.

60. What is the purpose of the Analytics pane in Tableau?

The Analytics pane allows you to add advanced analytical elements to your visualization, such as trend lines, forecasts, and reference lines.

Tableau Interview Questions for Experienced

61. Express the contrast between Tableau Reader and Tableau online by characterizing them in a word.

Tableau peruser is only an application for the work area, which comes liberated from cost. It empowers clients to see the visualizations worked in the Tableau Desktop by opening it flawlessly. Clients could, in fact, channel and drill down the data. Be that as it may, you can't perform or alter any kind of communication.

Running against the norm, Tableau online is only the facilitated variant of the Tableau waiter. Discussing the Tableau waiter, it is undertaking focused Tableau Software. You will want to distribute the dashboards with the Tableau Desktop and store them here. Tableau online is only the facilitated form of it.

62. What precisely is implied by the term 'Aspects'?

Discussing the term 'Aspects,' these are only the apparent quality qualities for the different components of every property. Aspects are fit for characterizing a large number of markers. Having reference to a particular item's essential structure, an aspect table can be comprised of item type, size, name, portrayal, and varieties, aside from different properties.

63. What are the limitations in Tableau?

The Known issues in a tableau are: 

Handling an Unlicensed Server, Handling an Unlicensed VizQL Server Process and Cookie Restriction Error.

64. What number of max tables could we at any point participate in Tableau?

In Tableau, we can join a limit of 32 tables.

 

65. How to plan for a Tableau interview?

Center around the basics and ultimately have some familiarity with Dimensions and Measures since that is one of the significant ideas in Tableau.

66. What is Lod in Tableau?

Level of Detail articulations (LOD articulations) permits you to figure values at the data source and visualization levels.

67. What number of channels are there in Tableau?

There are incomplete six kinds of channels in Tableau, which are,

  • Remove Filters
  • Data Source Filters
  • Setting Filters
  • Aspect Filters
  • Measure Filters
  • Table Filters

68. Explain the concept of data blending in Tableau. When and why would we use it?

Data blending in Tableau is a technique used to combine data from different data sources into a single visualization. This is helpful when your data resides in separate spreadsheets, databases, or files. Data blending is generally used when a single data source cannot provide all the required information for analysis or when we want to maintain a certain level of separation between data sources.

69. Explain the concept of data scaffolding in Tableau and how it can benefit your analysis.

Data scaffolding in Tableau is the ability to create and generate data directly within Tableau using calculations without external data sources. It is a way to "build" data from scratch to fill in gaps or create reference lines. 

70. Describe the process of creating a parameter-driven advanced analytics model in Tableau. 

In Tableau, Creating a parameter-driven advanced analytics model involves utilizing parameters to adjust and drive complex calculations dynamically—an interactive exploration of data scenarios.

71. How do you implement Row Level Security (RLS) in Tableau?

Answer:
Row Level Security (RLS) restricts data access for specific users based on their roles. To implement RLS in Tableau:

  • Create a calculated field for filtering the data.
  • Use user functions like USERNAME() or ISMEMBEROF() to match the current user.
  • Apply this field as a filter to restrict data visibility.

72. How can you optimize query performance in Tableau when working with large datasets?

To optimize query performance:

  1. Use extracts instead of live connections
  2. Implement incremental extracts
  3. Use context filters
  4. Leverage data source filters
  5. Aggregate data before analysis
  6. Use efficient calculations (e.g., LOD expressions instead of table calculations when possible)
  7. Implement query fusion
  8. Use the Tableau Performance Recorder to identify bottlenecks

73. How do you implement Conditional Formatting in Tableau?

To implement Conditional Formatting:

  • Create calculated fields with IF/THEN logic.
  • Apply colors or shapes based on the field values.
  • Format the cells using the calculated field in your visualization to highlight specific data conditions.

74. Explain the concept of query fusion in Tableau and how it impacts performance.

Query fusion is Tableau's ability to combine multiple queries into a single query, reducing the number of queries sent to the data source. This improves performance by minimizing database load and network traffic. Tableau automatically attempts to fuse queries when possible, but understanding this concept helps in designing more efficient workbooks.

75. How do you optimize Tableau Extracts?

To optimize Tableau extracts:

  • Reduce data using filters.
  • Aggregate data to the appropriate level.
  • Use selective fields instead of all fields.
  • Split large datasets into smaller, manageable parts.

76. Describe the process of creating a custom SQL query in Tableau.

To create a custom SQL query:

  1. Connect to your data source
  2. Select "New Custom SQL" in the connection dialog
  3. Write your SQL query
  4. Click "OK" to use the query as your data source

77. What is a Tableau Data Source Certification, and why is it important?

Tableau Data Source Certification is a feature that allows organizations to identify trusted data sources. Certified data sources are marked to indicate reliability and ensure users are using vetted, accurate data for analysis.

78. Explain the concept of data densification in Tableau and provide an example of when you might use it.

Data densification is the process of adding missing rows or columns to a visualization to show a complete set of data points, even when the underlying data has gaps. It's useful for:

  • Showing all dates in a time series, even if some dates have no data
  • Creating jitter plots or beeswarm plots
  • Generating Gantt charts with precise start and end times

79. What is a Hyper File in Tableau, and how does it differ from TDE?

A Hyper File is a high-performance data engine format used in Tableau for storing extracts. It supports faster data loading and querying, handles large datasets better, and is optimized for parallel processing. TDE (Tableau Data Extract) is the older format, which has been largely replaced by Hyper.

80. How would you approach creating a complex dashboard with multiple levels of interactivity and drill-down capabilities?

To create a complex interactive dashboard:

  1. Plan the dashboard layout and user flow
  2. Create individual worksheets for each view
  3. Implement hierarchies for drill-down functionality
  4. Use parameters for user-controlled inputs
  5. Leverage action filters for cross-filtering between views
  6. Implement set actions for dynamic selections
  7. Use sheet swapping for showing/hiding detailed views
  8. Optimize performance using efficient calculations and filters
  9. Test thoroughly to ensure smooth user experience

81. How do you handle multi-tenancy in Tableau?

To handle multi-tenancy:

  • Use Row Level Security (RLS) to restrict data access based on user identity.
  • Create separate Tableau projects and permissions for each tenant.
  • Deploy a combination of data sources and workbooks specific to each tenant.

82. How can you use Level of Detail (LOD) expressions to solve the parallel period comparison problem?

To compare parallel periods:

1. Create a date comparison calculated field:

(SUM([Sales]) - [Previous Year Sales]) / [Previous Year Sales]

 

2.Create an LOD expression for the previous year's sales:

{FIXED [Customer ID], DATETRUNC('month', [Date Comparison]): SUM([Sales])}

 

3. Create a final calculated field for year-over-year growth:

DATEADD('year', -1, [Order Date])


This approach allows for accurate parallel period comparisons while maintaining the current level of detail in the view.

83. What is the importance of Tableau Metadata API, and how can you use it?

The Tableau Metadata API allows users to query the metadata of Tableau content such as data sources, workbooks, and dashboards. It helps in:

  • Identifying data lineage.
  • Managing and monitoring Tableau assets.
  • Understanding data relationships and usage.

84. How would you implement a dynamic axis in Tableau that changes based on user selection?

To create a dynamic axis:

1. Create a parameter with the desired axis options

2. Create calculated fields for each potential axis measure

3. Create a final calculated field that switches between measures based on the parameter:

CASE [Axis Parameter]
 WHEN 'Sales' THEN [Sales]
 WHEN 'Profit' THEN [Profit]
 WHEN 'Quantity' THEN [Quantity]
END

 

4. Use this calculated field in your visualization

5. Add the parameter control to the dashboard for user interaction

85. How do you handle real-time streaming data in Tableau?

To handle real-time data:

  • Use Tableau Data Streams or connect to live data sources like Kafka or Amazon Kinesis.
  • Connect Tableau to a database that stores real-time data, and refresh data at shorter intervals (e.g., every minute).
  • Use Tableau’s live connections for on-the-fly queries.

86. How can you use set actions to create advanced interactivity in Tableau dashboards?

Set actions allow for dynamic updates to set membership based on user interactions. To implement:

  1. Create a set based on the desired field
  2. Add worksheets to a dashboard
  3. Create a set action:
    • Source Sheet: The sheet users will interact with
    • Target Set: The set to be modified
    • Run Action On: Select the appropriate user action (select, hover, or menu)
  4. Use the set in calculated fields or filters in other worksheets

87. How would you use Tableau with a NoSQL database?

To connect Tableau to a NoSQL database:

  • Use a driver or connector like Simba for databases like MongoDB or Google BigQuery.
  • Alternatively, create a middleware layer that converts NoSQL data into a format Tableau supports, like SQL.
  • Work with JSON data in Tableau if supported directly.

88. Describe the process of creating a custom map projection in Tableau.

To create a custom map projection:

  1. Prepare a background image of your desired map projection
  2. Add the background image to your worksheet
  3. Create calculated fields for X and Y coordinates based on your projection's formula
  4. Plot your data points using these calculated X and Y fields
  5. Adjust the background image to align with your plotted points
  6. Fine-tune the alignment using map layers and annotations as needed

89. How do you set up a Tableau Server cluster for high availability?

To set up a Tableau Server cluster for high availability:

  • Install Tableau Server on multiple nodes.
  • Configure a Gateway node for load balancing.
  • Enable replication of Tableau Server’s internal services (e.g., repository, backgrounder).
  • Ensure the failover mechanism is in place for critical components.

90. Describe the process of creating a custom polygon map in Tableau using spatial files.

To create a custom polygon map:

  1. Prepare your spatial data (e.g., Shapefile, GeoJSON, KML)
  2. Connect to the spatial file in Tableau
  3. Double-click the Geometry field to create the map
  4. Add measures and dimensions to color, size, or label the polygons
  5. Customize the map appearance using map layers and map options
  6. Join or blend additional data sources if needed
  7. Add interactivity with filters, tooltips, and actions
  8. Optimize performance by using extracts and simplifying geometries if necessary

Tableau MCQ Questions

1. Which of the following is a file extension for a Tableau packaged workbook?

A) .tbw

B) .twbx

C) .tde

D) .hyper

Answer: B) .twbx

2. What is the purpose of the Pages shelf in Tableau?

A) To filter data

B) To create sets

C) To create animations over time

D) To create groups

Answer: C) To create animations over time

3. Which function in Tableau is used to calculate the cumulative sum?

A) RUNNING_SUM()

B) TOTAL()

C) WINDOW_SUM()

D) PREVIOUS_VALUE()

Answer: A) RUNNING_SUM()

4. In Tableau, which of the following is used to limit the number of data points displayed?

A) Filters

B) Context Filters

C) Parameters

D) Calculated Fields

Answer: A) Filters

5. What type of join returns all the records from both tables and fills in NULLs where there are no matches?

A) Inner Join

B) Left Join

C) Right Join

D) Full Outer Join

Answer: D) Full Outer Join

6. Which Tableau feature allows you to highlight a subset of your data while still displaying the whole data set?

A) Tooltip

B) Highlighter

C) Filter

D) Action Filter

Answer: B) Highlighter

7. What is the primary use of Tableau Extract files (.hyper)?

A) To store the workbook structure

B) To compress data for improved performance

C) To store custom calculations

D) To maintain a live connection

Answer: B) To compress data for improved performance

8. Which of the following features in Tableau allows users to click on an item in a view to filter the dashboard?

A) Data blending

B) Cross-join

C) Action Filter

D) Data source filter

Answer: C) Action Filter

9. What does the Tableau function DATETRUNC() do?

A) Truncates a string

B) Truncates a number

C) Truncates a date to the specified date part

D) Adds days to a date

Answer: C) Truncates a date to the specified date part

10. Which of the following best describes a Dimension in Tableau?

A) Quantitative data

B) Qualitative data

C) Measures that are aggregated

D) A calculated field

Answer: B) Qualitative data

Also read, Bank interview questions

Frequently Asked Questions

How do I prepare for a Tableau interview? 

To prepare for a Tableau interview, Review core concepts like calculations, visualizations, and data connections, practice creating complex dashboards using LOD expressions, and optimize performance. 

What are the three types of Tableau? 

The three types of Tableau are Tableau Desktop for individual use, a Server for collaborative sharing, and an Online for cloud-based accessibility. Each type has different needs, from personal analysis to enterprise-level data distribution and visualization.

How do you explain a dashboard in a Tableau interview? 

In a Tableau interview, a dashboard is a dynamic and interactive visual display of data insights. It combines multiple visualizations and actions to present a comprehensive view. It enables users to explore and derive meaningful conclusions from complex datasets.

How is Tableau used? 

Tableau is used for data visualization and analysis. It transforms raw data into interactive visual insights. Businesses utilize Tableau to uncover trends and patterns, enhancing their understanding of their data and facilitating informed strategies.

Conclusion

In this article, through the multiple Tableau interview questions, we have learned that the act of data visualization is becoming urgent to overcome any barrier between the human and a machine to intervene in scientific understanding helpfully. This instrument has made the whole course of investigating data and scrutinizing your item market fit simpler. It has different in-fabricated highlights for data investigation without getting overpowered by the product components.

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