May 26, 2021 Tableau
Dear readers, these Tableau interview questions are specifically designed to understand the nature of the questions you may encounter during the interview about SAS programming topics. In my experience, good interviewers have little intention of asking any particular questions in your interview, usually starting with some basic concepts on the topic, after which they continue to build on further discussions and your answers:
What is Tableau?Tableau is a business intelligence software that allows anyone to connect to the appropriate data and then visualize and create interactive, shareable dashboards.
The page where the data source can be set. /b10> The Data Source page typically consists of four main areas: the left pane, the join area, the preview area, and the metadata area.
Saved subsets of data sources that can be used to improve performance and offline analysis.
Explain the functionality of Tableau?
Tableau has three main features, such as:
What is a set?
In Tableau, you use collections to create subsets of data based on specific user-defined conditions. The set is created only on the basis of dimension fields.
Tableau has two types of collections, such as:
A pane that contains the formatting that controls the entire worksheet, as well as the fields in the view.
The syntax that supports aggregation on dimensions other than the view level. /b10> Using the details expression level, you can attach one or more levels to any aggregation expression.
Normal filters are used to limit data in a database based on the selected dimension or measure. /b10> However, quick filters are used to give users the opportunity to dynamically change data members at runtime.
Tableau Reader is a free viewing app that lets anyone read and interact with packaged workbooks created by Tableau Desktop.
No
There won't be any connections, but we'll just refer to the column as a relationship between the primary and foreign keys.
There should be a common dimension to blend data sources into a single worksheet.
What are hierarchical fields?
In Tableau, hierarchical fields are used to drill down into data. This means that you can view the data more finely.
Tableau treats any field that contains qualitative, category information as a dimension. /b10> This includes any fields that have text or date values.
A measure is a field that depends on the value of one or more dimensions. /b10> Tableau treats any field that contains numeric (quantitative) information as a measure.
It is a file that represents tableau Packaged Workbook, where the .twb file is combined with the data source.
Custom filters, context filters, normal filters.
With the cards on the left side of the view, you can drag fields to control marker properties such as type, color, size, shape, labels, tool tips and details.
They are named areas on the left and top of the view. /b10> Build a view by putting fields on the shelf. /b11> Some shelves are only available when selecting certain tag types.
It is a file with a .twb extension that contains one or more worksheets (and possibly dashboards and stories).
Create a worksheet that creates a view of the data by dragging the field to the shelf.
An alternate name that can be assigned to a field or dimension member.
In context filters, filter conditions are applied first to the data source, and then some other filters are applied only to the result record.
You can compare multiple measures using two axes, which are two separate axes superimposed on top of each other.
Page racks are used to control the display of output by selecting the display order.
More extractions, filters, and dependency data sources.
These are the built-in calculations in the tables we typically use to calculate percentage changes.
Data blending is used to mix data from multiple data sources into a single sheet. /b10> The data is connected in a common dimension.
No
It creates a direct connection to the data source and accelerates access.
It imports the entire data source as an extract into the Tableau s Fast Data Engine and saves it in a workbook.
Arguments are dynamic values that can replace constant values in calculations.
It refers to a file that contains data extracted from an external source, such as MS Excel, MS Access, or CSV files.
A story is a worksheet that contains a series of worksheets or dashboards that work together to convey information.
It contains connection information that is independent of any workbook and can be used by multiple workbooks.
It contains connection information and is associated with the workbook.
If the data resides in a single source, we use a connection, but when your data is not in one place, we use blending.
You need to publish the report to the tableau server, and when you publish, you'll find an option to schedule the report. You only need to select when you want to refresh the data.
Displays the existing data used to apply the desired view to the worksheet. /b10> These views can be pie, scatter, or line charts.
The pane on the left side of the workbook shows the fields of the data source connected to Tableau.
Use formulas to modify new fields created by existing fields in the data source.
It is a text table view. /b10> Use a text table to display the numbers associated with the member.
In menu data - The new connection drags the table to the data pane to view its data.
Open the table metadata on the menu data - a new connection, and then click the column name to create an alias.
Use the NOW() function.
BY uses the ISDATE() function.
DATEADD(\'month\',3,#2014-03-12#)= 2004-07-15 12:00:00 AM
The REPLACE function searches for substrings in a given string and replaces it with a replacement string.
COUNT() function.
TOP filter.
The Gantt chart shows the progress of the value of a task or resource over time. /b10> So a time dimension of Gant chart is an essential area.
Forecasting is about the future value of predictive measures. /b10> There are many mathematical models for prediction. /b11> Tableau uses models that are known to be exponentially smooth.
Trend lines are used to predict the continuation of certain trends in a variable. /b10> It also helps to identify the correlation between two variables by observing the trend of two variables at the same time.