Tableau interview questions

Tableau interview questions Download Tableau interview questions PDF

Tableau interview questions

Application Server forms handle content perusing, server organization and permissions for the Tableau Server web and mobile interfaces.

The Gateway routes demand from the different parts. Requests that roll in from the customer first hit an outer load balancer if one is designed, or the portal and are routed to the proper procedure. Without an outside load balancer, if various procedures are arranged for any part, the Gateway will go about as a load balancer and disperse the requests to the procedures.

The backgrounder invigorates planned extracts, conveys notifications and manages other background assignments. The backgrounder is intended to expend as much as CPU is accessible to complete the background action as fast as could be possible.

Line charts interface singular information points in a view. They give a basic method to imagine an arrangement of qualities and are helpful when you need to see trends after some time, or to figure future qualities. A Line Chart is the quite popular kind of the data visualization. Generally speaking, it is utilized to emphasize trends in information over equivalent time interims, for example, quarters, months, financial years, and much more.

The Tableau parameters are dynamic variables or dynamic values that replace the constant values in data evaluation and filters.
The user can create an evaluated field value that returns true when the score pars the 80, and otherwise false.
The radical difference actually lies in the application.
The parameters allow users to insert the values, which can be integers, float, date, string that can be used in calculations.
The filters only receive values users choose to ‘filter by’ the list, which cannot be used to calculate.
The users can dynamically change the dimensions and measures in parameter but filters do not approve the feature.
Fact table:
They are the measurable quantities or the numeric metrics of the data which can be analyzed by dimension table.
Facts are stored in the fact table contain foreign keys that uniquely refers to the associated dimension tables.
The fact table is compatible to store the data at the atomic level and thus, it allows a large number of records to be inserted at once.
For instance, a sales category fact table can have a product key, customer key, promotion key referring to a specific event.
Dimension table:
They are the descriptive attribute values for various dimensions of each attribute which define multiple characteristics.
A dimension table referring a product key from the fact table can consist of a product name, product type, color, size, and description.
Context filter:
Tableau helps in making the filtering process straightforward and easy.
It does so by creating a hierarchy of filtering, where all the other remaining filters that are present refer to the context filter for all their subsequent operations.
Thus, the remaining filters will now process the data, that is already passed through the context filter.
Development of one or more context filters helps in improving the performance, as the users do not have to create extra filters on the large data source, which actually reduces the query-execution time.
Limitations of context filter:
Generally, Tableau takes a little time for placing a filter in context.
In case the filter is set as a context one then the software develops a temporary table for that specific context filter.
This table reloads each time and consists of all the variables and values that are not filtered by context or custom SQL filter.
First copies or subdivisions of the actual data from the original data source are called data extract.
The workbooks which use the data extracts instead of using live DB connections are faster and the extracted data is imported into Tableau engine.
Later after the extraction of data the users can publish the workbooks which publish the extracts in Tableau server.
And, the scheduled refreshers are the scheduling tasks which are already set for data extract refresh so that they get refreshed automatically while a workbook is published with data extraction.
Some of the dashboard components are:
  • Horizontal component: In the dashboard the horizontal component’s containers allow the designer to combine the worksheets and dashboards components from left to right across the user’s page and the height of the elements are edited at once.
  • Vertical component: In the dashboard Vertical component’s containers allows the user to combine the worksheets and dashboard components from left to right across the user’s page and the width of the elements are edited at once.
  • Text: It is an alphabetical order.
  • Image Extract: A Tableau is in XML format. In case of extracting images, the Tableau applies the codes to extract an image can be stored in XML.
  • Web [URL ACTION]: A Web URL action is a certain type of hyperlink that directs to a web page always or to any other web-based resource that is residing outside of Tableau. The user can hence use the URL actions for linking up of more information about the user’s data, which might be hosted outside of the user’s data source. In order make the link relevant to the user data, the user can substitute field values of a selection into the URL as parameters.

A dashboard is an information management device that visually tracks, analyzes and shows key performance indicators (KPI), measurements and main points which focus on the screen to monitor the health of a business, division or particular process. They are adaptable to meet the particular needs of a department and company. A dashboard is the most proficient approach to track numerous data sources since it gives a central area to organizations to screen and examine performance.

A Column chart is a realistic graphical representation of data. Column charts show vertical bars going over the chart on a horizontal plane, axis having values are displayed on the left-hand side of the graph. Column charts and a various number of different sorts of graphs are often created in spreadsheet programs, such as Microsoft Excel or Open Office Calc. Column charts can be utilized to show an extensive range of information, for example, sales patterns, stock value changes, and precipitation amounts by year.

Tableau gives an unmistakable and powerful tool to control down the output display, which is known as Page shelf. As the name recommends, the page shelf parts the view into a series of pages, displaying an alternate view on each page, making it easier to understand and minimizing scrolling to analyze and see information and data.

Bin is a user-defined gathering of measures in the information source. It is conceivable to make bins concerning measurement, or numeric bins. You could consider the State field as various sets of bins each profit value is arranged into a bin comparing to the state from which the value was recorded. But then also, if you want to look out values for Profit assigned to bins without reference to measurement, you can make a numeric bin, with every individual bin relating to the scope of values.

Tiled items are organized in a single layer grid that modifies in a measure, which is based on the total dashboard size and the objects around it. Floating items could be layered on top of other objects and can have a permanent size and position.

Floating Layout While most questions are tiled on this dashboard, the map view and its related color legend are floating. They are layered on top of the bar graph, which utilizes a tiled layout.