1. http://nitin-panwar.github.io/Top-100-Data-science-interview-questions/
  2. https://onlinecoursetutorials.com/data-science/data-science-interview-questions-and-answers/
  3. https://app.codesignal.com/ - Database section has SQL questions
  4. https://blog.uwgb.edu/bansalg/statistics-data-analytics/linear-regression/
  5. https://www.coriers.com/the-data-science-interview-study-guide/
  6. https://www.analyticsvidhya.com/blog/2017/01/46-questions-on-sql-to-test-a-data-science-professional-skilltest-solution/