Top 30 Tableau Interview Questions and Answers – Most Asked

1. Tableau Interview Questions and Answers

In this article, “Tableau Interview Questions and Answers”, we are going to check & explore the knowledge of Tableau. In this Tableau Interview Questions and Answers, we are providing a list of most commonly asked Tableau interview questions, which are asked in an interview for Tableau developers and Tableau Programmers. Before we proceed with Tableau Interview Questions and Answers, let’s revise the Tableau Tutorial.

Tableau Interview Questions and Answers

2. Frequently Asked Tableau Interview Questions and Answers

Here, we are going to study about mostly asked Tableau Interview Questions with Answers. Let’s solve them one by one:

Q.1 What’s the distinction between context filter to alternative filters?

Whenever we tend to create context filter

• Tableau can produce a brief table for this specific filter set and alternative filters are apply on context filter knowledge like cascade parameters. Suppose we’ve created context filter on countries >> we’ve chosen the country as USA and Bharat.
• Tableau can produce a brief table for this 2 countries knowledge and if you have got the other filers >>other are apply to this 2 countries knowledge if, we don’t have any context filter.
• Each and an individual record can check for all filters.

Let’s Explore Different Types of Filters in Tableau in Detail

Q.2 What’s the disadvantage of context filters?

• The context filter isn’t oft-times modified by the user – if the filter is modified the info should recompute and rewrite the temporary table, deceleration performance.
• When you set a dimension to context, Tableau crates a brief table which will need a reload when the read is initiated. For Excel, Access, and text knowledge sources, the temporary table created is in associate Access table format. For SQL Server, My SQL and Oracle knowledge sources, you want to have permission to form a brief table on your server. While for flat knowledge supply, or cubes, temporary tables aren’t created, and context filters solely outlined that filters are freelance and dependent.

Q.3 What are the 5 main product offered by Tableau company?

Tableau offers 5 main products: Tableau Desktop, Tableau Server, Tableau on-line, Tableau reader and Tableau Public.

Q.4 What’s the present latest version of Tableau Desktop(as of Sept, twenty-fifth 2017)?

Current version: Tableau Desktop Version ten.4

Q.5 Why Tableau?

Whether your knowledge is in associate on-premise info, a database, an information warehouse, a cloud application or associate stand out file, you’ll analyze it with Tableau. You’ll produce views of your knowledge and share it with colleagues, customers, and partners. You’ll use Tableau to mix it with alternative knowledge. And you’ll keep your knowledge up to this point mechanically.

Read About Tableau Tutorial – Learn Tableau Data Visualization

Q.6 What are Filters? what are number sorts of filters there in Tableau?

A filter is nothing, however, it’s restricted to redundant, it’s showing actual knowledge. Primarily filters are three sorts.

1. Fast filter
2. Context filter
3. Datasource filter

Tableau Interview Questions and Answers For Freshers. Q- 3,4

Tableau Interview Questions and Answers For Experience. Q- 1,2,5,6

Q.7 What’s disaggregation and aggregation of data?

Suppose I actually have knowledge like

Eid Ename earnings Dept

1.abc 2000 java

2.bbc 3000 .net

3.Krishna 2500 java

Madhu 300

5.Vamshi 3000 mainframes

1.abc one thousand testing

2.bbc 3000 tableau

3.krishna 5000.net

4.Madhu 7000 testing

vanshi 9000 tableau

1 first rudiment one000 Mainframes

2 bbc 13000testing

3 Krishna 15000 java

4 Madhu 17000 .nte

5 vamshi 19000.net

Aggregation: To show mixture knowledge

Sum/avg earnings by every individual worker

Drag ename on columna and earnings on rows we are going to get total (salary) of every and individual worker

Now modification live sort as Avg

Choose earnings choice – select live sorts as “Avg”

Disaggregation: To show every and each group action
When you consider the collective knowledge within the views on top of, every bar represents all transactions for a particular worker summed up or averaged into one price. Currently, say that you simply wish to check the individual earnings transactions for every worker. You’ll produce a read like that by choosing Analysis>Aggregate Measures.

Q.8 The way to take away the All choices from a Tableau automotive vehicle – filter?

Right-click filter>>customize>>uncheck show all choice

Q.9 Will we tend to use non – used columns (Columns that aren’t employed in reports however knowledge supply has columns) in Tableau Filters?

Yes!

Ex. In knowledge supply, I actually have a column like
empID, EmpName, EmpDept,EmpDsignation, EmpSalary
In reports, I’m victimization empname on columns and empsalry on rows.

I will use empDesignation on Filters

Read More About Tableau Filter Operations

Q.10 What’s an advantage of Tableau extract file over the live connection?

An extract is used anyplace with none affiliation and you’ll build your own visualizations while not connecting to info.

Q.11 The way to mix 2 stand out files with same fields however totally different knowledge (different years)?

I have five totally different stands out files (2007.xls, 2008.xls..2011.xls) with same fields (film name, genre, budge, rating, profitability) however, with knowledge from a totally different year (2007 to 2011). Will somebody tell Maine, however, am I able to mix the film name, genre, and profit in order that I will see the image of 2007 to 2011 in an exceedingly single chart?

Q.12 Gamma hydroxybutyrate no of tables we are able to take part Tableau?
We can be part of gamma-hydroxybutyrate thirty-two table, it’s unacceptable to mix over thirty-two tables.

Tableau Interview Questions and Answers For Freshers. Q- 8,9,10,11,12

Tableau Interview Questions and Answers For Experience. Q- 7

Q.13 What’s the distinction between connection and mixing in Tableau?
Joins in Tableau:

For Eg: Your shopper is in care domain and victimization SQL Server as their info. In SQL server there is also several Tableau like Claims Tables, Rejected Claims Table, client Table. Now, the shopper needs to grasp client wise claims and client wise rejected claims table victimization the joins. Be part of could be a question that mixes the information kind a pair of or a lot of tables by creating use of being part of the condition.

We can be part of gamma-hydroxybutyrate thirty-two table, it’s unacceptable to mix a lot of then thirty-two tables.
In Tableau the joins will perform in a pair of ways in which.

1. By creating use of common columns.
2. By creating use of common knowledge sorts.

If we tend to produce joins on the fields in Tableau all the table names ar suffixing with $. Whereas playacting the joins on multiple tables, invariably escort the less quantity of information tables, in order that we are able to improve the performance.
In Tableau the joins are divided into a pair of sorts.

1. Equi Join,
2. Non-Equi be part of

A. Equi Join: Within to be part of a condition if we tend to ar victimization Equality”=”operator then such a sort of be part of referred to as Equi be part of.

B. Non-Equi Join: Within the be part of condition with the exception of the Equality”=”if we tend to use the other operator like <,>,<=,>= and=! Then such a sort of joins are referred to as Non-Equi be part of
Equi be part of is split into three sorts

1. Inner Join,
2. Outer Join,
3. Self – be part of.

a. Inner Join: Inner be part of can hundreds the sole matching records from each table. Inner be part of condition:
Tableaa.id = Tableb.id
b.Outer Join: Once more the outer be part of divided into three sorts.

• Left Outer
• Right Outer
• Full Outer

i. Left outer Join: Displays the entire knowledge from the left + matching records from the proper table.
Condition: tablea.id(+)

ii. Right Outer Join: Displays the entire knowledge from the proper + matching records from the left.
Condition: tablea.id(+)=tableb.id

iii. Full outer: Full outer join load the entire knowledge from the left table and right table.
Condition: Table A full outer be part of Table B ON tablea.id= tableb.id

Let’s learn more about Tableau Joins – Types of Joins in Tableau

c. Self-Join: If we tend to ar playacting be part of to identical table itself such a sort of be part of referred to as self-join
Non-Equi Join:

In the be part of a condition if we tend to ar victimization the operators with the exception of the equality “=” then such a sort of be part of are referred to as Non-Equi join.

Data mixing in Tableau:

For Ex: Your shopper is same care shopper. They’re operational their services in Asia, Europe, sodium so on & the maintaining Asia knowledge in SQL, Europe knowledge in SQL Server and sodium knowledge in MY SQL.

Now, your shopper needs to research their business across the planet in an exceedingly single worksheet. Thus you can’t perform be part of here.

Now you have got build use of information mixing construct.

Normally within the Tableau, we are able to perform the analysis on the one knowledge server. If we would like to perform the analysis from the multiple knowledge sources in an exceedingly single sheet then we’ve to form use of a replacement construct referred to as knowledge mixing.

Data mixing combines {the knowledge|the info|the information} from the various data sources and permit the users to perform the analysis in an exceedingly single sheet. Mixing suggests that combining. If we tend to ar combining {the knowledge|the info|the information} sources then it’s referred to as data mixing.
Rules to perform the information mixing

In order to perform knowledge mixing, there are few rules.

1. If we tend to ar playacting {the knowledge|the info|the information} mixing on a pair of knowledge supply these a pair of data sources ought to have a minimum of one common dimension.
2. In this common dimension, a minimum of one price ought to match.

In Tableau, we are able to perform the information mixing in a pair of ways in which.

1. Automatic method
2. Custom way

Automatic method: Within the automatic way Tableau mechanically defines the link between the two knowledge sources supported the common dimensions and supported the matching values and also the relationship is indicated by orange color.

Custom or Manual method: Within the manual or custom way the user has to compel to outline the link manually.
Data mixing functionality

1. All the first knowledge sources and also the secondary knowledge sources are coupled with a specific relationship.
2. Whereas playacting the information mixing every worksheet encompasses a primary affiliation and optionally it would contain many secondary connections.
3. All the first connections are indicated within the blue within the worksheet and every one the secondary knowledge sources indicated with the orange color tick mark.
4. Within the knowledge mixing one sheet contains one primary knowledge supply and one sheet will contain finish variety of secondary knowledge sources.

Q.14 What are Dimensions and Facts?

Dimensions are nothing, however, the descriptive text columns and facts are measures (numerical values) dimension ex: product name town.facts: sales, profit.

Q.15 The way to rectify SQL Performance for developed Dashboards

After creation of Dashboards if we tend to get drawback from sql aspect which means Custom Sql ….How to Rectify the sql performance from custom sql.

Q.16 Suppose my license expires these days, will users ready to read the dashboards or book that i revealed in server earlier.

If your server license expires these days, your username on the server can have the role ‘unlicensed’ which implies you can’t access, however, others will. the positioning Admin will ‘Change Ownership’ to a different person, thus extracts if enabled don’t fail.

Q.17 Assume that I’m victimization Tableau desktop and have a live affiliation with Cloud era Hadoop knowledge. I would like to press F5 to refresh the image. Is there any way to mechanically refresh the image each x minutes rather than pressing F5 every-time?

Here is that the example of a refreshing dashboard in every three seconds, Replace API src and server computer address with yours. The interval below is for three seconds.
Tableau JavaScript API

Q.18 What Tableau Desktop is?
Tableau Desktop is predicated on breakthrough technology from Stanford University that allows you to drag & drop to research knowledge. It’s nice knowledge image tool, you’ll connect with knowledge in an exceedingly few clicks, then visualize and create interactive dashboards with a couple of a lot of.

Tableau Interview Questions and Answers For Freshers. Q- 14,15,16,17

Tableau Interview Questions and Answers For Experience. Q- 13

Q.19 What are the variations between Tableau code, GoodData and Ancient bismuth (Business Objects, etc.)?

You could speak feature – practicality for days, however at a high level there are four major variations.

1. Speed: How briskly are you able to arise and running with the system, answer queries, style, and share dashboards and so modification them? This is often wherever systems like Tableau and GoodData are much better than previous – college business intelligence like Business Objects or Cognos. Ancient systems took months or years to intelligence like Business Objects or Cognos. Ancient systems took months or years to implement, with prices running to millions. Tableau encompasses a free path that installs in minutes and GoodData is cloud – primarily based so that they are quicker to implement by orders of magnitude. they’re additionally quicker to results: Ancient bismuth needs IT and developers to form any changes to reports, thus business users affect in an exceedingly queue waiting to induce something done. Tableau and GoodData give a lot of a self – service expertise.
2. Analysis layer: This is often wherever Tableau excels. it’s a strong and versatile drag & drop image engine supported some technology from Stanford. GoodData and ancient bismuth generally give some canned reports however ever-changing them needs vital time and cash.
3. Knowledge layer: This is often wherever the 3 choices are most different:

GoodData needs you to maneuver your knowledge to its cloud. ancient bismuth generally needs you to maneuver your knowledge to its knowledge warehouse system. Tableau connects to a range of existing knowledge supply and additionally provides a quick in – memory knowledge engine, primarily an area info. Since most enterprises have their knowledge keep everywhere the place, this provides the foremost alternative and lets firms use the investment they’ve already created.

1. Enterprise readiness: ancient bismuth and Tableau move here, with enterprise-level security and high quantifiability.

Q.20 What’s Tableau Software?

Tableau is business intelligence code that permits anyone to simply connect with knowledge, then visualize and build interactive, shareable dashboards. It’s simple enough that any stand out user will learn it, however powerful enough to satisfy even the foremost advanced analytical issues. Firmly sharing your findings with others solely takes seconds.

Q.21 What’s Tableau Server?

Tableau Server is browser- and mobile-based insight anyone will use. Publish dashboards with Tableau Desktop and share them throughout your organization. It’s simple to line up and even easier to run.

Q. 22 Make a case for the mixing of Tableau with R?

R could be a common ASCII text file setting for applied mathematics analysis. Tableau Desktop will currently connect with R through calculated fields and make the most of R functions, libraries, and packages and even saved models. These calculations dynamically invoke the R engine and pass values to R via the Rserve package, and are come back to Tableau.

1. Tableau Server may also design to attach to associate an instance of Rserve through the tabadmin utility, permitting anyone to look at a dashboard containing R practicality.
2. Combining R with Tableau provides you the flexibility to bring deep applied mathematics analysis into a drag-and-drop visual analytics setting.

Let’s Study More About R Programming Langauge

Q.23 What’s the distinction between a fast filter and traditional filter in tableau?

A quick filter is employed to look at the filtering choices and might wont to choose the choice. traditional filer are a few things you’ll limit the choices from the list or use some conditions to limit the information by field or price.

Read More About Types of Filters in Tableau

Q.24 However do I automatize reports victimization Tableau software?

You need to publish report back to tableau server, whereas publication you may realize one choice to schedule reports. You just have to compel to choose the time once you wish to refresh knowledge.

Tableau Interview Questions and Answers For Freshers. Q- 20,22,24

Tableau Interview Questions and Answers For Experience. Q- 19,21,23

Q.25 However is Tableau thus quick once operating with databases?

Tableau compiles the weather of your visual canvas into a SQL or MDX question for the remote info to a method. Since a info generally runs on a lot of powerful hardware than the laptops/workstations utilized by analysts, you ought to typically expect the info to handle queries abundant quicker than most in memory bismuth applications restricted by an end user hardware. Tableau’s ability to push computation (queries) near {the knowledge|the info|the information} is more and more vital for giant data sets, which can reside on a quick cluster and should be overlarge to usher in memory. Another consider performance relates to knowledge transfer, or in Tableau’s case result set transfer. Since Tableau visualizations design for human consumption, it tailored to the capabilities and limits of the human perception system.

This typically means the quantity {of knowledge|of knowledge|of information} in an exceedingly question result set is little relative to the scale of the underlying data, and visualizations target aggregation and filtering to spot trends and outliers. the tiny} result sets need little network information measure, thus Tableau is ready to fetch and render the result set terribly quickly. And, as Ross mentioned, Tableau can cache question results for quick reprocess.

The last issue involves Tableau’s ability to use in-memory acceleration as required (for example, once operating with terribly slow databases, text files, etc.). Tableau’s knowledge Engine uses memory mapped I/O, thus whereas it takes advantage of in-memory acceleration it will simply work with massive knowledge sets that cannot slot in memory. the information Engine can work solely with the subsets of information on disk that are required for a given question, and also the knowledge subsets are mapped into memory as required.

Q.26 What’s Tableau Desktop?

Tableau Desktop could be a knowledge image application that allows you to analyze nearly any kind of structured knowledge and turn out extremely interactive, stunning graphs, dashboards, and reports in precisely minutes. when a fast installation, you’ll connect with nearly any knowledge supply from spreadsheets to knowledge warehouses and show info in multiple graphics views. Designed to be simple to use, you’ll be operating quicker than ever before.

Q.27 However will Tableau Work?

While Tableau allows you to analyze databases and spreadsheets like ne’er before, you don’t have to compel to grasp something regarding databases to use Tableau. In fact, Tableau is meant to permit business folks with no technical coaching to research their knowledge with efficiency. Tableau predicate on 3 straightforward concepts:

• Connect: Connect Tableau to any info that you simply wish to research.

Note that Tableau doesn’t import the information. Instead, it queries the info directly.

• Analyze: Analyzing knowledge suggests that viewing it, filtering it, sorting it, playacting calculations thereon, reorganizing it, summarizing it, and so on. Using Tableau you’ll do all of those things by merely arrangement fields of your knowledge supply on a Tableau worksheet. once you drop a field on a worksheet, Tableau queries the information victimization normal drivers and question languages (like SQL and MDX) and presents a visible analysis of the information.
• Share: You’ll share results with alternatives either by sharing workbooks with other Tableau users, by pasting results into applications like Microsoft workplace, printing to PDF or by victimization Tableau Server to publish or engraft your views across your organization.

Q.28 What’s the distinction between tableau seven.0 and 8.0 versions.

1. New visualizations are introduced like treemap, bubble chart and box and whisker plot
2. We are able to copy worksheet directly from one book to a different book
3. Introduced R script.

Q.29 Make a case for the options of Tableau eight.3?

With Kerboros support, Tableau 8.3 advances enterprise-grade knowledge analysis with these enhancements:

1. Provides seamless, single sign-on expertise from Tableau shopper to back-end knowledge sources
2. Protects sensitive knowledge with delegated access and viewer papers management
3. Connects to measure knowledge sources through stable, automatic back-end authentication
4. Leverages existing IT investments in enterprise-grade authentication and knowledge security
5. Supports revolving credit authentication

Q. 30 What’s Metadata?

The Descriptive info regarding the data system and its contents is thought as information. It defines the sort of information we tend to are storing.

Read More About Tableau Metadata – Editing/Managing 

Tableau Interview Questions and Answers For Freshers. Q- 25,29,30

Tableau Interview Questions and Answers For Experience. Q- 26,27,28

3. Conclusion

As a result, we have seen top 30 Tableau Interview Questions and Answer. Thus, once you go through it, you will get an in-depth knowledge of questions which may frequently ask in Tableau interview. We hope all these questions will help you in preparing well for your Tableau interviews ahead. Also, if you want to ask any query regarding Tableau Interview Questions feel free to ask in the comment section. We will be happy to answer.