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Tableau Interview Questions in Kolkata

36 practice questions with answers for Tableau interviews in Kolkata.

Tableau jobs in Kolkata

Kolkata has a steady IT-services and BFSI technology job market around Salt Lake Sector V and New Town. Many openings are with service companies and their delivery centres, with a focus on strong fundamentals.

Below are 36 questions that match the mix of service, product and domain employers hiring tableau developers in Kolkata.

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01

Calculate month-over-month percentage growth.

Table CalculationsMedium
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MoM Growth: (SUM([Sales]) - LOOKUP(SUM([Sales]), -1)) / ABS(LOOKUP(SUM([Sales]), -1)) Compute along month. The first month returns null because there is no previous value. Format as percentage and colour positive and negative values differently for quick reading.
02

What is a context filter?

Filters, Parameters and ActionsEasy
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A context filter is an independent filter that runs before other dimension filters, Top N filters and FIXED LODs. Tableau creates a temporary result set from it, and other filters work on that subset. Use it when Top N should apply within a selection, such as top 10 products within a chosen region. Context filter pills turn grey in the Filters shelf.
03

What is a dashboard and a story in Tableau?

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A dashboard is a collection of sheets, filters, legends, text, images and objects arranged on one canvas so users can see related views together and interact through actions. A story is a sequence of story points, each showing a sheet or dashboard in a particular state, used to present a narrative such as how sales changed and why. Stories suit presentations, dashboards suit monitoring.
04

What are the main table calculation functions?

Table CalculationsMedium
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Key functions are RUNNING_SUM, RUNNING_AVG, WINDOW_SUM, WINDOW_AVG, WINDOW_MAX, LOOKUP, PREVIOUS_VALUE, INDEX, FIRST, LAST, SIZE, RANK, RANK_DENSE, RANK_PERCENTILE and TOTAL. They operate on aggregates, so arguments must be aggregated, such as RUNNING_SUM(SUM([Sales])). WINDOW functions accept start and end offsets for moving calculations.
05

How do you create a hierarchy and a group from the Data pane?

Tableau FundamentalsMedium
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For a hierarchy, drag Sub-Category onto Category in the Data pane and name it, then drag Product below Sub-Category. For a group, right-click a dimension, choose Create, then Group, select members with Ctrl, and click Group, renaming it. Optionally tick Include Other to bucket remaining members. Both appear as new fields and can be used on any sheet.
06

How do you gather requirements before building a dashboard?

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Situation: a supply chain team asked for an inventory dashboard without clear details. Task: understand what they needed. Action: I met users to ask which decisions they make, which KPIs and filters matter, refresh frequency and who will use it, then sketched a wireframe and confirmed it. Result: the first version was accepted with only minor changes, saving rework time.
07

What are quick table calculations?

Table CalculationsEasy
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Quick table calculations are ready-made table calcs available from a measure pill's dropdown: running total, difference, percent difference, percent of total, rank, percentile, moving average, YTD total, compound growth rate, year over year growth and YTD growth. They are fast to apply and can be edited later to change addressing or turned into a calculated field by dragging the pill to the Data pane.
08

How do you choose the right chart type for data?

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Choose by the question: comparison of categories uses bar charts, trends over time use line charts, part to whole uses stacked bars or treemaps with few categories, relationships between two measures use scatter plots, distributions use histograms or box plots, and geography uses maps. Keep charts simple and avoid pie charts with many slices, 3D effects or dual axes that confuse readers.
09

Your manager says the dashboard total does not match the Excel total. How do you investigate?

Tableau FundamentalsMedium
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First compare filters, date ranges and data refresh time between both sources. Check the aggregation used, for example SUM versus AVG, and whether joins have duplicated rows, which inflates totals. Use View Data to inspect underlying rows and COUNT the records. Check null handling and whether Excel has hidden rows or manual adjustments. Document the cause and fix it at the data source level.
10

What are show and hide buttons in dashboards?

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Show and hide buttons let users collapse or expand a floating container, such as a filter panel or help text, by clicking a button. They save space on crowded dashboards and keep the main view clean. You enable it from the container menu with Add Show/Hide Button, and style it with images or text. They also work well for mobile layouts.
11

What is a URL action and give an example?

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A URL action opens a web page, a file or an email link using field values from the selected mark. For example, clicking an order can open the order details page in an internal system with the Order ID passed in the URL, or clicking a company can open a search. URL actions can open in a new tab or inside a web page object in the dashboard.
12

How do you create a navigation menu between multiple dashboards?

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Add Navigation objects or buttons from the Objects pane, set each to go to a target dashboard, and style them with text or images. Place them in a horizontal container at the top of each dashboard for consistency. Use Go to Sheet actions for drill-through from charts. Hide sheets and use Show Sheets as Tabs off when publishing, so users rely on the custom menu.
13

A manager wants to download dashboard data into Excel but you must protect sensitive fields. What do you do?

Dashboards and Tableau ServerMedium
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Control capabilities through permissions: allow Download Summary Data but deny Download Full Data, or deny downloads entirely for some groups. Remove sensitive fields from the data source or hide them, and apply row-level security so downloaded data is limited to the user's scope. Provide a dedicated crosstab sheet with approved fields for export and document what is allowed.
14

How do you ensure your dashboards are actually used after launch?

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Situation: an earlier dashboard I built had low usage after launch. Task: improve adoption on the next project. Action: I involved users in design, ran a short training session, added a how-to-use panel, set subscriptions for managers, and checked usage statistics monthly to remove unused views. Result: weekly active users doubled compared with the earlier dashboard, and feedback guided the next release.
15

What is a parameter in Tableau?

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A parameter is a user-controlled variable, such as a number, date or string, that is not tied to the data. It does nothing alone; you reference it in calculations, filters, reference lines, Top N or bins. Examples are a measure switcher, a what-if discount rate, or a dynamic Top N. Parameters can be shown as dropdowns, sliders or type-in fields.
16

How do you calculate the number of days taken to ship an order?

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Days to Ship: DATEDIFF('day', [Order Date], [Ship Date]) Late Flag: IF DATEDIFF('day', [Order Date], [Ship Date]) > 4 THEN 'Late' ELSE 'On time' END Use AVG(Days to Ship) per region to compare delivery performance.
17

What is the difference between a filter and a parameter?

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A filter directly restricts data in the view based on field values and can show multiple selections. A parameter is a single value variable that users change, and it affects the view only through calculations or features that reference it. Filters are tied to data fields; parameters are global and can be used across data sources, making them useful for switching measures or dimensions.
18

Top 10 products do not change when the user selects a region. Why?

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Top N filters run before normal dimension filters, so Top 10 is computed on all regions, and then the region filter removes some of those products. Add the Region filter to context, so it runs first and Top 10 is calculated within the selected region. The Region pill turns grey to show it is a context filter.
19

What is the difference between joining, blending and relationships?

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Joins merge tables at row level before analysis and can duplicate values. Blending queries each source separately, aggregates the secondary to the linking fields, and combines results per sheet, so it works across sources but has limitations such as no COUNTD from secondary in some cases. Relationships define flexible links and let Tableau choose joins per view while keeping each table's grain.
20

What are site roles in Tableau Server or Cloud?

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Site roles define the maximum capabilities a user can have. Creator users can connect to data, build in Desktop and Prep and publish. Explorer users can explore and web edit existing data sources, with Explorer (can publish) allowing publishing. Viewer users can view and interact with dashboards. Site Administrator roles manage users and content. Permissions on content further restrict what each user can do.
21

A stakeholder asks for a pie chart with 15 categories. What do you suggest?

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Explain that a pie with 15 slices is hard to read because people compare angles poorly. Suggest a sorted horizontal bar chart showing values and percentages, which makes ranking clear, or group the smallest categories into Others and show the top five. If they still want a pie, limit it to a few slices. Offer both and let them choose based on readability.
22

What is the difference between RANK, RANK_DENSE, RANK_MODIFIED and RANK_UNIQUE?

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For values 100, 90, 90, 80: RANK gives 1, 2, 2, 4 (competition ranking). RANK_DENSE gives 1, 2, 2, 3 without gaps. RANK_MODIFIED gives 1, 3, 3, 4. RANK_UNIQUE gives 1, 2, 3, 4, breaking ties by order. Choose based on business rules, for example dense ranking for leaderboards where ties should share a position without skipping.
23

Extract the first name from a full name field.

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Using SPLIT: SPLIT([Customer Name], ' ', 1) Using FIND and LEFT: LEFT([Customer Name], FIND([Customer Name], ' ') - 1) Trim spaces first if data is messy: SPLIT(TRIM([Customer Name]), ' ', 1) SPLIT is simpler, while the second method shows string function skills.
24

What is the difference between row-level and aggregate calculations?

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A row-level calculation is computed for each record, for example [Sales] - [Cost]. An aggregate calculation works on groups at the view level, for example SUM([Profit]) / SUM([Sales]). Mixing them in one expression causes the error cannot mix aggregate and non-aggregate arguments. Ratios should usually be aggregate so they are correct at any level, instead of averaging row-level ratios.
25

How do you create a basic bar chart of sales by region?

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Connect to the data source, drag Region to Columns and Sales to Rows. Tableau aggregates Sales with SUM and chooses bars. Sort descending using the toolbar sort icon, drag Region to Color for distinct colours if needed, and drag SUM(Sales) to Label to show values. Rename the sheet and add a meaningful title such as Sales by Region, current year.
26

What are dynamic parameters?

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Since version 2020.1, parameters can refresh their list of values or current value from a field when the workbook opens. For example, a date parameter can default to the latest date in the data using a calculation like MAX([Order Date]), and a list can pull current region names. This removes manual maintenance when new values appear in data.
27

What is meant by granularity or level of detail of a view?

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The level of detail of a view is the combination of dimensions placed on Rows, Columns and the Marks card. Each unique combination produces one mark. If only Region is in the view, Sales is summed per region; adding Category on Detail splits each region into category marks. Understanding view granularity is the foundation for LOD expressions and for explaining why numbers change when fields are added.
28

An Employee ID field is being summed in your view. What do you do?

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Employee ID is numeric, so Tableau classified it as a measure. Right-click it in the Data pane and choose Convert to Dimension, and optionally Convert to Discrete. Now it acts as a label rather than an aggregated number. If you need the number of employees, use COUNTD(Employee ID) instead of SUM. Fixing default properties early avoids wrong numbers across all sheets.
29

What other Tableau file types should an analyst know?

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Common types are .tds (data source definition with connection and metadata), .tdsx (packaged data source with extract), .hyper (extract file), .tfl and .tflx (Tableau Prep flows), .tbm (bookmark of a single sheet) and .tps (preferences for custom colour palettes). Knowing them helps when publishing reusable data sources, sharing flows, or troubleshooting why a colleague cannot open a workbook.
30

What types of filters are available in Tableau?

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Tableau has extract filters, data source filters, context filters, dimension filters, measure filters, table calculation filters and date filters such as relative date, range and individual dates. Filters can be shown as quick filter controls like dropdown, single value list, multiple values list, slider or wildcard match. Each type applies at a different stage in the order of operations.
31

Business wants financial year April to March in reports. How do you handle it?

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Right-click the date field, choose Default Properties, then Fiscal Year Start, and select April. Tableau then shows FY quarters and years based on April. For a label such as FY 2025-26, create a calculation: IF MONTH([Order Date]) >= 4 THEN STR(YEAR([Order Date])) + '-' + RIGHT(STR(YEAR([Order Date]) + 1), 2) ELSE STR(YEAR([Order Date]) - 1) + '-' + RIGHT(STR(YEAR([Order Date])), 2) END.
32

What is data blending and when would you use it?

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Data blending combines data from two separate data sources on a sheet using linking fields, with one primary and one or more secondary sources. Secondary data is aggregated to the linking level and then joined like a left join. Use it when data lives in different systems and cannot be joined, such as sales in a database and targets in Excel. Relationships have replaced many blending use cases.
33

What is the difference between Only Relevant Values and All Values in Database?

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For quick filters, All Values in Database shows every value of the field regardless of other filters. Only Relevant Values shows only values that remain after other filters, creating cascading filters such as states within the selected region. Relevant values need extra queries and can slow dashboards, so use them carefully on large data. All Values in Context is another option.
34

Describe a time you had to learn a new Tableau feature quickly for a project.

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Situation: a client needed a what-if pricing dashboard in one week. Task: I had not used parameter actions before. Action: I studied official help pages, built a small prototype on sample data, and asked a senior to review it before applying it to real data. Result: the dashboard launched on time and the client used it in a pricing review meeting.
35

A stakeholder says the dashboard is too crowded. How do you redesign it?

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Ask which questions they need answered first. Follow a top-down layout: KPIs at the top, main trend and comparison charts in the middle, details at the bottom or on drill-through. Remove decorative elements, reduce colours, align objects in containers, use white space and consistent fonts, and move secondary filters into a collapsible panel using show and hide buttons.
36

Build a Pareto chart showing what share of customers drive 80 percent of sales.

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Sort customers by sales descending on Columns. Running share of sales: RUNNING_SUM(SUM([Sales])) / TOTAL(SUM([Sales])) Running share of customers: INDEX() / SIZE() Use a dual axis with bars for sales and a line for running percent, and add a reference line at 0.8.

Companies with offices in Kolkata (5)

IT services

Wipro

Tableau interview questions

  • 30 questions
  • 4 rounds

Bengaluru, Hyderabad, Pune +2

View questions
IT services

Cognizant

Tableau interview questions

  • 30 questions
  • 4 rounds

Chennai, Bengaluru, Pune +2

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Consulting

EY

Tableau interview questions

  • 30 questions
  • 4 rounds

Bengaluru, Kolkata, Gurugram +2

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Consulting

PwC

Tableau interview questions

  • 30 questions
  • 4 rounds

Kolkata, Bengaluru, Mumbai +2

View questions
IT services

Genpact

Tableau interview questions

  • 30 questions
  • 4 rounds

Gurugram, Hyderabad, Bengaluru +2

View questions

Frequently asked questions

Which companies hire Tableau professionals in Kolkata?

Companies with large offices in Kolkata include Wipro, Cognizant, EY, PwC, Genpact. Use their company pages below to practise employer-specific sets.

Are Tableau interviews in Kolkata different from other cities?

The questions depend more on the company than the city. Kolkata's mix of employers decides the style: Many openings are with service companies and their delivery centres, with a focus on strong fundamentals

How do I find Tableau jobs in Kolkata?

Shortlist companies with Kolkata offices, keep your CV focused on Tableau projects, apply on company career pages and job portals with the Kolkata filter, and practise the questions on this page before each interview.

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