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      Junior Data Scientist Interview

      18 Dec 2025
      Anonymous interview candidate
      Johannesburg
      No offer
      Negative experience
      Difficult interview

      Application

      I applied through a recruiter. I interviewed at Capita (Johannesburg) in Aug 2025

      Interview

      Initial call was a prescreening, basic questions about my expertise and if my experience aligns with the role. First interview was testing my fundamental knowledge of data science concepts and BI concepts. 24 hour assessment. Presenting the assessment in the 3rd round. I was told I'd present an executive slide deck based on the instructions, but when the interview came I was cut off mid presenting my findings and I asked to be given time to finish the presentation and then I'd answer questions at the end, but they kept interrupting me and that threw me off.

      Interview questions [1]

      Question 1

      My understanding of cardinality and data modelling in Power BI.
      Answer question