Boston Consulting Group Junior Data Analyst interview questions

Quick zoom call with HR: very casual, only question was why did I apply for the position, other questions were asking about citizenship, etc. From the call with HR he sent me a "project" and told me to finish it within 3-5 days. Was a case study essentially but with millions of rows of data to process on Python and later create visualizations with Tableau.... Turned in my project, scheduled interview with senior data analyst within a few hours. Interview came, half in Spanish, half in English. Casual conversation rather than structured interview. Presented my findings from the project, answered questions they had. I thought it went well, but one week later I received a rejection.

Basics were asked and the background of what done so far. Don't need to worry just go through basics. Go to LinkedIn and talked to people to know the insight of the job profile.