If you’re working with data but don’t have the tools to create great data visualizations – Tableau is the tool you are looking for. It is one of the most popular tools that individuals and companies alike use to visualize collected data. People need to constantly improve their knowledge while companies are looking for professional Tableau developers.
If you are passionate about working with data and looking to get a job at one of the highest paying companies, Tableau interview questions will help you get ready.
This guide will provide you with the most popular and important information that you can use during your interview training.
In terms of basic questions, these are the ones that you are likely to come across the most. Many companies have special “new employee training programs”. They are designed to help you get started with the company. This applies not only to your working conditions! Most likely the curriculum will consist of spreadsheet-related courses and lessons. This is why you are likely to be asked exactly these questions (if you are not aspiring to high positions).
Many people neglect basic questions. They think they already know all the intricacies of Tableau fundamentals and there is nothing new to learn or revisit. These people are hard to learn – they are asked a simple question during the interview, and since they have not revised it, they stutter and only make the situation worse for themselves. Even if you think you know everything there is to know about the basics of Tableau, it’s still a good idea to come freshly prepared – it can be harder to define a simple concept than you think!
In general, once you are done with these basic interview questions, you have a pretty clear picture of the types of questions you can expect during a real interview. So, without further ado, let’s get started.
Question 1: What is Tableau?
You probably won’t be surprised to see this as the very first question on the list. And in truth, you shouldn’t – of all the questions that can be asked first, this is the most likely one.
This question is important. This will set the mood for the rest of the interview – employers often use it to test how well you can define broad terms of your own. Many people see this question, go to Google, read the general answer, and then just repeat it during the interview. In such cases, employers are often asked to say the same only in their own words. It is important not only to know what it is, but also to explain it in simple terms.
A little advice
If you come in for an interview and tell your potential employers about Tableau in an original way they haven’t heard before, great! You probably just left a lasting impression on yourself, and from now on, the course of the interview will be different. Your interviewers will see that you are able to form your thoughts and then express them clearly and concisely. This will cause them to immediately begin to have a certain sense of respect for your knowledge, which can make a huge difference when you retain the position after interview questions on the Spreadsheet.
Let’s get back to the actual question – what is Tableau?
When people talk about Tableau, they often refer to the software and not the company. For this, “Tableau” will be considered a rendering program, unless otherwise stated.
Tableau is a data visualization program created by a company of the same name in Washington DC, USA. This software allows developers to visually represent the data and information they collect. Thus, it makes the process of exploring data metrics and making conclusions a much easier and smoother process.
Question 2: What is the definition of “data visualization”.
It can also be one of the very first Tableau interview questions your potential employers ask you. Since this is the core concept of Tableau, it is important that you know not only what it is, but what the purposes of using it are.
Data visualization refers to the way the collected data is presented in a visually appealing form. This usually includes rows, tables and whatever comes with it. It is widely known and recognized that information presented in this way is much more accessible and easy to understand when you try to analyze it. Data visualization avoids confusion and various uncertainties when analyzing large amounts of information.
Question 3: What are the main products of Tableau?
Although that doesn’t sound like one of the interview questions. If you don’t know the products that Tableau has to offer, it means that you are most likely only concerned with specific, niche topics and do not have a complete understanding of Tableau.
In total, Tableau offers five main products: Tableau Desktop, Server, Reader, Online, and Public. Each of these products targets different audiences (i.e. individuals versus companies) and performs different functions required to better visualize data.
- Tableau Desktop . It is business intelligence and data visualization. It is used to translate images into data-optimized queries. By importing data into the Tableau data engine, you can integrate various sources and view them in an interactive dashboard.
- Tableau Server . This allows multiple dashboards to be published and shared through the organization’s Tableau web server.
- Tableau Online . The hosted version of Tableau Server. It is used to speed up and simplify the use of business intelligence.
- Tableau Reader . Application that is used to view visualizations embedded in Tableau Desktop.
- Tableau Public . Free Tableau software that is used to create visualizations to be saved in worksheets on the Tableau server.
Question 4: What is a “page shelf”?
One of the most frequently asked Tableau interview questions across all platforms. The Page shelf is a tool that Tableau uses to control the visual output of your data. It is a widely used and valuable tool, mainly because of its handy and usefulness when it comes to data visualization.
Question 5: What are “hierarchies” used for?
Hierarchies offer a way to segment and organize your information into levels. Tableau does this by assigning different values to each data type. This allows you to have better control over what you see and improves the accuracy of your data visualization.
Since this is one of the interview questions that allows you to expand your answer a little, you can use an example of a hierarchy – just to make sure your interviewers know that you know what you are talking about. A perfect example would be Doberman Pinscher – Dog – Animal. In this example, segmentation is well defined.
Question 6: Can you automate reports in Tableau?
Yes. You do this by scheduling them before publishing. You only need a date for scheduling – once set, your reports will be automatically published on the set date.
Question 7: What is measurement?
Tableau: Dimension is a field that is assigned a separate value. These can be text fields, dates, etc.
Question 8: What is the advantage of using “check out file”?
Most of the time, developers use live connection when working on their Tableau projects. However, extracting the file allows you to work with it without the need for a stable internet connection.
Question 9: In what situations would you use ‘Join’ and ‘Blending’?
Both of these commands are used by the Tableau developers, so you will most likely receive this as one of the Tableau interview questions. Fortunately, however, it is quite easy to answer and explain correctly.
Both commands are used to connect a primary data source to a secondary one. In situations where your data is in the same place, you need Join. However, if the data is scattered across several different locations, you are more likely to use Blending.
Question 10: How many tables can you concatenate in Tableau?
The absolute maximum number of tables that can be joined in Tableau is 32.
Advanced interview questions
Now that you know what to expect from an interview, we can move away from basic questions and answers and move on to more complex ones.
Tough Tableau questions will help you know how well you know the software and all its components. Unless you’re trying to get a job as a Tableau expert, your employers likely won’t be bombarding you with many of the questions on this list.
They are very similar in nature to basic questions. The only difference is that in order to answer difficult questions, you must have a pretty good understanding of what Tableau visualization software is.
Below you will find 5 examples of the most frequently asked follow-up interview questions. Study them well and you should do well in your interview!
Question 1: Define “data modeling”.
Statistically speaking, data modeling is primarily used by businesses and not by individual developers. This is a process that is aimed at analyzing data and finding patterns (relationships) in them.
This is why it is so popular with businesses. Analyzing customer data and finding specific patterns can help a business create and target ads, modify their product design, and so on. This is an essential feature of any successful business, both individual and corporate level.
In addition, data modeling is the very first step that developers take when working with object-oriented programming.
Question 2: What is the largest number of rows Tableau can use?
If you are thinking about a specific number, you are already wrong!
When it comes to strings in Tableau interview questions, they can use an unlimited number of them. This is for several reasons. First of all, the rows do not take up much space – they are comparatively insignificant. Additionally, Tableau is configured to load and display only the rows that are needed at that particular time and situation. Thus, it further reduces the load on the platform.
Question 3: What is the use of a “secondary axis”?
Secondary axes almost exclusively serve one purpose – to help you analyze your data quickly.
The secondary axis is usually added next to the primary axis. It offers additional specificity when analyzing and comparing data.
Question 4: Can you test the performance with Tableau?
You can go and say that this is one of the trickiest questions in an interview with Tableau, as answering it wrong will likely show your employers that you are lacking in Tableau knowledge and experience.
Why is that, you might say? Well, mostly because performance testing is one of the most important features of Tableau. This can be done by downloading the Tableau plugin (TabJolt) and running the script with it.
Question 5: Why would you change the parameters in the table?
Tableau has specific sets of parameters that are used in every operation that it performs. Naturally, if you are a Tableau developer, there will be several scenarios in which the data you have to analyze will have some very conflicting variables. In these situations, you should change the default parameters to match the parameters required for successful data analysis.
Many companies are looking for Tableau developers who are good at teamwork, problem solving, and using Tableau itself. These companies are willing to pay excellent salaries and offer amazing career opportunities for such developers.
This is why you should remember to be yourself during your interview. If you show that you have motivation and work well as a team, your potential employers may turn a blind eye to some interview questions that you were unable to answer and ask you to join the company.
If you’re just getting started with Tableau and are just looking at these questions to understand what the future holds, great! It’s best to start learning as soon as possible. This way, you can not only make time for yourself, but also learn what is necessary for this work. Be sure to check out other tutorials and courses that may be helpful in your future career.