Friday, 17 March 2017

Alteryx Designer Interview Questions Answers

Explain what is Alteryx Designer?
Alteryx is a desktop application for data blending and advanced analytics, enabling users to gather data from any source, blend it, and provide sophisticated predictive and spatial analytics with an easy-to-use drag-and-drop interface.

What are the advantage and disadvantages of Alteryx Designer?
Advantage:
  • Alteryx has fantastic blending capabilities
  • Alteryx can interact with most popular databases and files available today
  • Alteryx is the only ETL tool in the market that can output a tableau data extract (TDE)
  • Alteryx is not just an ETL tool, it can be used to perform a whole lot of analytics on your data
  • Alteryx integrates with R seamlessly and can be used for predictive modelling.
  • Alteryx can also be used to build reports with prompt filters
Disadvantages:
  • While Alteryx outputs a tableau data extract seamlessly it cannot read a similar extract
  • Alteryx does not have good support for special characters
  • Alteryx is not stable and crashes frequently when multiple users access the same workflow on the server
  • Slight learning curve to understand all the tools and some of the Statistical R packages aren't always straightforward.
How do you turn annotations on and off?
Per Tool: You can turn them on/off per tool, meaning you want to keep some annotations while omitting others. To do this click on the individual tool. Go to Annotation from the Properties window and in the Display Mode, select the appropriate choice.
Per Module : There is a toggle switch on the Module Properties window where you can either turn all the annotations on or off for that particular module. Additionally you can have greater control leaving this feature on and controlling the annotations per tool as described above.
Through Global Settings: You can set up the global settings so that Annotations will appear the same way for each and every module and tool.

What is the difference between the Transpose tool and the CrossTab tool? 
The Transpose and CrossTab tools are alike in that they both transform the orientation of your data, but are opposite in their behavior.
The Transpose tool pivots horizontal data to a vertical axis. The CrossTab performs the reverse, pivoting vertical data to the horizontal axis, by summarizing the data on a grouping field.

How can you save an expression ? 
Expressions can be saved so that they can be used over and over again without having to create them from scratch.
Create your expression using a combination of selecting variables and inserting them into functions . Once you are happy with the formulated expression, click the Saved Expression tab. Hit the Save button and specify a name for your expression. Your expression is now saved for future use.

You received the following error, "No Values found before GetMean()" - What does this mean?
Check your configurations upstream. If there is an Allocate Append tool, be sure the spatial object specified in the drop down selection is a polygon object and NOT a point object. If the error is coming from a Reporting Map tool, ensure you are not choosing Smart Tiling on a String field as a Thematic mapping tile mode.

How can you change a word or a character or remove it? 
From the File menu, go to Open Sample --> Basic Samples --> Data Problem and Solution Flexibility

How can you change a field type? 
Primarily the best place to change a field's type is through the  Formula tool. There is more control for custom conversion through the formula tool.
The next best place to change a field's type is the Select tool or, there are a number of tools that have an embedded select within the tool. Therefore you can change a field's type there as well. Tools that contain an embedded select are: Join, Join Multiple, Append Fields, Spatial Match, and Find Nearest.

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