First online situational multi choice exam - easy. Next a statistical face to face interview - difficult. Next a take home challenge - challenging but very engaging. Required machine learning and good presentation skills. Finally meeting other members.
Interview questions [1]
Question 1
calculate the sample size needed for a certain statistical significance.
I applied online. I interviewed at Barclays (Londres, Inglaterra)
Interview
Applied for a Data Scientist role completed a first round interview, Machine Learning modelling coding challenge and over 20 page powerpoint deck. and didn't hear back for over 1 month. Still haven't heard anything - the internal Barclays recruiter stopped replying to my e-mails. Very disappointing experience.
Interview questions [1]
Question 1
- Bias Variance Trade-off
- Mathematical explanations of CART (Classification and Regression Tree) Algorithms - different variations and preventing overfitting
- Which statistical metric can you use to determine overfitting for models fit using K-Fold Validation
I applied online. I interviewed at Barclays (New York, NY) in Aug 2018
Interview
phone interview with the recruiter, data challenge with the manager, onsite with 3 rounds. the process was very smooth, had a good experience with the interview process. Had a feeling that the candidate was chosen even before i interviewed onsite.
Interview questions [1]
Question 1
questions were focused on statistics and machine learning fundamentals