Data Analyst Practice Questions – Connect to and Transform Data

Use the Data Analyst resource guide to find documentation related to this topic.

1. Which of the following would be a reason to use a live connection rather than an extract?

2. Which file type(s) are used for extracts?

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3. You have two tables with exam scores. Which operation should be used to combine the tables?

Name Gender Exam Score
Fabio Dethloff Female 60
Garret Crossby Male 56
Leela Hanaby Male 60
Markus Dacke Male 56

Name Gender Exam Score
Daryl Balding Female 55
Hewe Rawdales Female 59
Inge Gladdolph Female 56
Boycie Clows Female 59

4. Which Tableau function would be best for converting data in this format:

Name January February March
Daryl Balding 55 58 57
Hewe Rawdales 59 60 56
Inge Gladdolph 56 60 51
Boycie Clows 59 51 52

to this format
Name Month Score
Daryl Balding January 55
Hewe Rawdales January 59
Inge Gladdolph January 56
Boycie Clows January 59
Daryl Balding February 58
Hewe Rawdales February 60
Inge Gladdolph February 60
Boycie Clows February 51
Daryl Balding March 57
Hewe Rawdales March 56
Inge Gladdolph March 51
Boycie Clows March 52

5. What steps should you take to change "Customer Name" to "Customer Full Name"

3 thoughts on “Data Analyst Practice Questions – Connect to and Transform Data”

  1. 4. Which Tableau function would be best for converting data in this format

    The answers to this question are incorrect – the starting data is already pivoted, UNpivot would be the correct transformation, not pivot

    1. Hi,

      The question refers to the Tableau function, in Tableau there is no Unpivot function. The pivot function transforms multiple columns (in our case month names) into a single dimension (Month column in our case) with a single measure.

      Hope this makes it clear.

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