Tableau Interview Questions and Answers, Tableau Interview Questions and Answers Freshers, Tableau Interview Questions and Answers, Tableau Interview Questions
Before getting on to the Tableau interview questions, the student must know that the Tableau is a continuously varying field which needs the students as well as professionals to upgrade their skills with the new features and knowledge, to get fit for the jobs associated with Tableau. This post related to Tableau Interview Questions and Answers, Tableau Interview Questions and Answers Freshers, Tableau Interview Questions and Answers, Tableau Interview Questions will help you let out find all the solutions that are frequently asked in you upcoming Tableau interview.
Over thousands of vacancies available for the Tableau developers, experts must be acquaintance with all the component of Tableau technologies. This is necessary for the students in order to have in-depth knowledge of the subject so that they can have best employment opportunities in the future. Knowing every little detail about Tableau is the best approach to solve the problems linked with the problem.
APTRON has spent hours and hours in researching about the Tableau Interview Questions and Answers, Tableau Interview Questions and Answers Freshers, Tableau Interview Questions and Answers, Tableau Interview Questions that you might encounter in your upcoming interview. All these questions will alone help you to crack the interview and make you the best among all your competitors.
First of all, let us tell you about how the Tableau technology is evolving in today’s world and how demanding it is in the upcoming years. In fact, according to one study, most of the companies and businesses have moved to the Tableau. Now, you cannot predict how huge the future is going to be for the people experienced in the related technologies.
Hence, if you are looking for boosting up your profile and securing your future, Tableau will help you in reaching the zenith of your career. Apart from this, you would also have a lot of opportunities as a fresher.
These questions alone are omnipotent. Read and re-read the questions and their solutions to get accustomed to what you will be asked in the interview. These Tableau interview questions and answers will also help you on your way to mastering the skills and will take you to the giant world where worldwide and local businesses, huge or medium, are picking up the best and quality Tableau professionals.
This ultimate list of best Tableau interview questions will ride you through the quick knowledge of the subject and topics like data source concept, Analysis, Creating Views. This Tableau interview questions and answers can be your next gateway to your next job as a Tableau expert.
These are very Basic Tableau Interview Questions and Answers for freshers and experienced both.
Q1: Compare QlikView and Tableau
A1:
Criteria Tableau QlikView
Data integration Exceptional Good
Working with multidimensional data Very Good Good
Support for PowerPoint Available Not available
Visual Drilldown Good Very Good
Scalability Good Limited by RAM
Q2: What is Data Visualization?
A2: A much advanced, direct, precise and ordered way of viewing large volumes of data is called data visualization. It is the visual representation of data in the form of graphs and charts, especially when you can’t define it textually. You can show trends, patters and correlations through various data visualization software and tools; Tableau is one such data visualization software used by businesses and corporates.
Q3: What are the differences between Tableau desktop and Tableau Server?
A3: While Tableau desktop performs data visualization and workbook creation, Tableau server is used to distribute these interactive workbooks and/or reports to the right audience. Users can edit and update the workbooks and dashboards online or Server but cannot create new ones. However, there are limited editing options when compared to desktop.
Tableau Public is again a free tool consisting of Desktop and Server components accessible to anyone.
Q4: Define parameters in Tableau and their working.
A4: Tableau parameters are dynamic variables/values that replace the constant values in data calculations and filters. For instance, you can create a calculated field value returning true when the score is greater than 80, and otherwise false. Using parameters, one can replace the constant value of 80 and control it dynamically in the formula.
Q5: Differentiate between parameters and filters in Tableau.
A5: The difference actually lies in the application. Parameters allow users to insert their values, which can be integers, float, date, string that can be used in calculations. However, filters receive only values users choose to ‘filter by’ the list, which cannot be used to perform calculations.
Users can dynamically change measures and dimensions in parameter but filters do not approve of this feature.Most in-depth, industry-led curriculum in Tableau.
Q6: What are fact table and Dimension table in Tableau?
A6:
1. Facts are the numeric metrics or measurable quantities of the data, which can be analyzed by dimension table. Facts are stores in Fact table that contain foreign keys referring uniquely to the associated dimension tables. The fact table supports data storage at atomic level and thus, allows more number of records to be inserted at one time. For instance, a Sales Fact table can have product key, customer key, promotion key, items sold, referring to a specific event.
2. Dimensions are the descriptive attribute values for multiple dimensions of each attribute, defining multiple characteristics. A dimension table ,having reference of a product key form the fact table, can consist of product name, product type, size, color, description, etc.
Q7: What are Quick Filters in Tableau?
A7: Global quick filters are a way to filter each worksheet on a dashboard until each of them contains a dimension. They are very useful for worksheets using the same data source, which sometimes proves to a disadvantage and generate slow results. Thus, parameters are more useful.
Q8: State limitations of parameters in Tableau.
A8: Parameters facilitate only four ways to represent data on a dashboard (which are seven in quick filters). Further, parameters do not allow multiple selections in a filter.
Q9: What is the difference between context filter to other filters?
A9: Whenever we crate context filter
• Tableau will create a temporary table for this particular filter set and other filters will be apply on context filter data like cascade parameters… suppose we have crated context filter on countries >> we have chosen country as USA and India
• Tableau will create a temporary table for this two countries data and if you have any other filers >>other will be apply on this two countries data if we don’t have any context filter
• Each and individual record will check for all filters
Q10: What is disadvantage of context filters?
A10:
• The context filter is not frequently changed by the user – if the filter is changed the database must recomputed and rewrite the temporary table, slowing performance.
• When you set a dimension to context, Tableau crates a temporary table that will require a reload each time the view is initiated. For Excel, Access and text data sources, the temporary table created is in an Access table format. For SQL Server, My SQL and Oracle data sources, you must have permission to create a temporary table on your server. For multidimensional data source, or cubes, temporary tables are not crated, and context filters only defined which filters are independent and dependent.
Q11: What are the five main product offered by Tableau company?
A11: Tableau offers five main products: Tableau Desktop, Tableau Server, Tableau Online, Tableau reader and Tableau Public.
Q12: What is the current latest version of Tableau Desktop(as of Sep, 25th 2017)?
A12: Current version: Tableau Desktop Version 10.4
Q13: What is data visualization?
A13: Data visualization refers to the techniques used to communicate data or information by encoding it as visual objects (e.g. points, lines or bars) contained in graphics.
Q14: What are Filters? How many types of filters are there in Tableau?
A14: Filter is nothing but it is restricted to unnecessary, it is showing exact data. Basically filters are 3 types.
1. Quick filter
2. Context filter
3. Datasource filter
Q15: What is the difference between Tableau and Traditional BI Tools?
A15: Tableau provides easy to use, best in class, visual analytic capabilities but has nothing to do with the data foundation or plumbing. But with an integration with a SQL server it can be the complete package.
On the other hand traditional BI tools have the before mentioned capabilities but then you have to deal with significant amount of upfront costs. The cost of consulting, software and hardware is comparatively quite high.
Q16: How many maximum tables can you join in Tableau?
A16: You can join a maximum of 32 tables in Tableau.
Q17: What are the different connections you can make with your dataset?
A17: We can either connect live to our data set or extract data onto Tableau.
• Live: Connecting live to a data set leverages its computational processing and storage. New queries will go to the database and will be reflected as new or updated within the data.
• Extract: An extract will make a static snapshot of the data to be used by Tableau’s data engine. The snapshot of the data can be refreshed on a recurring schedule as a whole or incrementally append data. One way to set up these schedules is via the Tableau server.
The benefit of Tableau extract over live connection is that extract can be used anywhere without any connection and you can build your own visualization without connecting to database.
Q18: What are sets?
A18: Sets are custom fields that define a subset of data based on some conditions. A set can be based on a computed condition, for example, a set may contain customers with sales over a certain threshold. Computedsets update as your data changes. Alternatively, a set can be based on specific data point in your view.
Q19: What are groups?
A19: A group is a combination of dimension members that make higher level categories. For example, if you are working with a view that shows average test scores by major, you may want to group certain majors together to create major categories.
Q20: What is a hierarchical field?
A20: A hierarchical field in tableau is used for drilling down data. It means viewing your data in a more granular level.
Q21: What is Tableau Reader?
A21: Tableau Reader is a free viewing application that lets anyone read and interact with packaged workbooks created by Tableau Desktop.
Q22: Which join i sused in data blending?
A22: There won’t be any joins as such but we will just give the column references like primary and foreign key relation.
Q23: What is a Dimension?
A23: Tableau treats any field containing qualitative, categorical information as a dimension. This includes any field with text or dates values.
Q24: What is a Measure?
A24: A measure is a field that is a dependent on value of one or more dimensions. Tableau treats any field containing numeric (quantitative) information as a measure.
Q25: What are shelves in Tableau?
A25: 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.
Q26: What is a Tableau workbook?
A26: It is a file with a .twb extension that contains one or more worksheets (and possibly also dashboards and stories).
Q27: Mention whether you can create relational joins in Tableau without creating a new table?
A27: Yes, one can create relational joins in tableau without creating a new table.
Q28: Mention what are different Tableau files?
A28: Different Tableau files include
• Workbooks: Workbooks hold one or more worksheets and dashboards
• Bookmarks: It contains a single worksheet and its an easy way to quickly share your work
• Packaged Workbooks: It contains a workbook along with any supporting local file data and background images
• Data Extraction Files: Extract files are a local copy of a subset or entire data source
• Data Connection Files: It’s a small XML file with various connection information
Q29: Mention what is the difference between published data sources and embedded data sources in Tableau?
A29: The difference between published data source and embedded data source is that,
• Published data source: It contains connection information that is independent of any workbook and can be used by multiple workbooks.
• Embedded data source: It contains connection information and is associated with a workbook.
Q30: Mention what are the characteristics to distinguish data source?
A30: The data source are distinguished on the basis of following characteristics
• Icon/Name
• Connection Type
• Connects to
• Live or Last extract
Q31: Mention when to use Joins vs. Blending in Tableau?
A31: 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.
Q32: Explain what is Tableau Data Extract?
A32: A table data extract is a compressed snapshot of data stored on disk and loaded into memory as required to render a Tableau. A TDE is a columnar store and reduce the input/output required to access and aggregate the values.
Q33: Explain what is the difference between blending and joining in Tableau?
A33:
• Joining term is used when you are combining data from the same source, for example, worksheet in an Excel file or tables in Oracle database
• While blending requires two completely defined data sources in your report.
Q34: What is the difference between context filter to other filters?
A34: Whenever we crate context filter >> Tableau will create a temporary table for this particular filter set and other filters will be apply on context filter data like cascade parameters… suppose we have crated context filter on countries >> we have chosen country as USA and India >> Tableau will create a temporary table for this two countries data and if you have any other filers >>other will be apply on this two countries data if we don’t have any context filter >> each and individual record will check for all filters
Q35: What is disadvantage of context filters?
A35: The context filter is not frequently changed by the user – if the filter is changed the database must recomputed and rewrite the temporary table, slowing performance.
When you set a dimension to context, Tableau crates a temporary table that will require a reload each time the view is initiated. For Excel, Access and text data sources, the temporary table created is in an Access table format. For SQL Server, My SQL and Oracle data sources, you must have permission to create a temporary table on your server. For multidimensional data source, or cubes, temporary tables are not crated, and context filters only defined which filters are independent and dependent.
Tableau Conclusion Interview FAQs
We know the list of Tableau Interview Questions and Answers, Tableau Interview Questions and Answers Freshers, Tableau Interview Questions and Answers, Tableau Interview Questions is overwhelming but the advantages of reading all the questions will maximize your potential and help you crack the interview. The surprising fact is that this Tableau interview questions and answers post covers all the basic of the Tableau technology and you have to check out the FAQs of different components of Tableau too.
However, you will be asked with the questions in the interview related to the above mentioned questions. Preparing and understanding all the concept of Tableau technology will help you strengthen the other little information around the topic.
After preparing these interview questions, we recommend you to go for a mock interview before facing the real one. You can take the help of your friend or a Tableau expert to find the loop holes in your skills and knowledge. Moreover, this will also allow you in practicing and improving the communication skill which plays a vital role in getting placed and grabbing high salaries.
Remember, in the interview, the company or the business or you can say the examiner often checks your basic knowledge of the subject. If your basics is covered and strengthened, you can have the job of your dream. The industry experts understand that if the foundation of the student is already made up, it is easy for the company to educate the employ towards advance skills. If there are no basics, there is no meaning of having learnt the subject.
Therefore, it’s never too late to edge all the basics of any technology. If you think that you’ve not acquired the enough skills, you can join our upcoming batch of Tableau Training in Noida. We are one of the best institute for Tableau in noida which provide advance learning in the field of Tableau Course. We’ve highly qualified professionals working with us and promise top quality education to the students.
We hope that you enjoyed reading Tableau Interview Questions and Answers, Tableau Interview Questions and Answers Freshers, Tableau Interview Questions and Answers, Tableau Interview Questions and all the FAQs associated with the interview. Do not forget to revise all the Tableau interview questions and answers before going for the Tableau interview. In addition to this, if you’ve any doubt or query associated with Tableau, you can contact us anytime. We will be happy to help you out at our earliest convenience. At last, we wish you all the best for your upcoming interview on Tableau Technology.
