Jan  Wisozk

Jan Wisozk

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Coding Concepts in Data Science Interviews in 2021 (Facebook, Twitch, Postmates)

In this video, we’ll talk about the 5 coding concepts that companies will test you on in data science interviews in 2021. As you guys know, I’m always tracking and collecting interview questions from various companies to better understand what technical concepts you need to know to succeed in interviews and what skills you need to have to succeed on the job. So these are questions that I’ve collected in the first few months of 2021. So they’re as real-time as can be. The companies that I’m sourcing from are Facebook, Postmates, Credit Karma, Ring Central, and Twitch. I’ll introduce the coding concept to know and then show you a real interview question I collected from the company.

Link to the questions:

Timeline:

  • Intro: (0:00​)
  • Concept #1 - Categorization, Aggregations, Ratios: (1:10​)
  • Concept #2 - JOINs, Subqueries, CTEs: (4:22​)
  • Concept #3 - Subqueries in the WHERE clause: (6:05​)
  • Concept #4 - Window Functions: (7:15​)
  • Concept #5 - Date Manipulations: (8:12​)
  • Conclusion: (9:35​)

#data-science #interview-questions

Coding Concepts in Data Science Interviews in 2021 (Facebook, Twitch, Postmates)