tableau interview questions and answers
1.
Best features of tableau
and limitations of tableau.
A.
Best visualizations with
less it cost,can connect to any database,no plugin required and powerful in
memory processing. Limitation : Only supports Windows and Mac.No support to
Linux based systems.
2.
what are the file size
limitations with tableau
A.
Offically no limit,but
we have observed best peformance with 4GB of data and 278 columns.
3.
what is the max file
size u used in tableau.
A.
4GB
4.
how many max columns we
can use in tableau.
A.
If you source is Access
then 255.
5.
what are the limitations
of tableau based on size, number of caluclations,
A.
No Limitation ,but
suggested to work with extracts with max 4 GB.
6.
have u ever used tableau
to perform etl or any complex calculations
A.
Tableau is a Ajax based
Java Scripting data Visualisation tool and it can not peform any ETL
actions.Complex calculation : Using Parameter in calculations.
7.
have u faced any
problems with file size and number of columns which we use in tableau
A.
So far no as i have been
working with limited data.
8.
what is tableau
achitecture.
A.
It is Client and Server
based N-Tier Achitecture. We build Tableau reports in using Tableau Desktop and
Deploy them to Tableau Server. Tableau Server runs on 3 diference services
Visual Server: This sends the queries to database and then coverts it to the
visuals/Images you see in tableau. Database/Repository Server: This manages the
connectivity and maintains the data extracts. Application Server: This handles
the Authentication and Authorization.
9.
what is tableau reader
A.
Tableau reader is used
to open the .twbx(Tableau packaged Workbook) files and it can only open the
files and it can not create new connections and workbooks.
10.
What are there any data
limitations with tableau public?
A.
Tableau Public can
connect to Microsoft Excel, Microsoft Access, and multiple text file formats.
It has a limit of 1,000,000 rows of data that is allowed in any single file.
Yes, your data on Tableau Public is now accessible on the world-wide web and is
downloadable by anyone. We strongly suggest you only publish data you are
willing to share with anyone.
11.
how can u set
permissions or protect the data in tableau public?
A.
We don't have any
options for applying permissions to user in Tableau public. World wide web
users will be able to access all files present in tableau public. No Security
in public,so don't share any company confidential data.
12.
if i delete a workbook
from tableau public and there are links to other blogs and other web
locations.. what happens to dem?
A.
Every thing will be
lost. Public is like a repository if you delete any thing in public the links
in blogs will show error " File does not exist".
13.
did u work on real time
reporting on tableau or u worked on back processing?
A.
I think question is
regarding executing the sql queries from back end or directly executing the
queries in tableau desktop.My answer will be: worked on writing the sql queries
in sql developer/todd and executing them in tableau desktop.
14.
what domain u worked on,
when u worked for tableau.
A. My answer will be Insurance domain and
currently working on Month end Process.
Hope it helped you..
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