I applied through an employee referral. The process took 4 weeks. I interviewed at Walmart (Sunnyvale, CA) in Aug 2014
Interview
one phone screen, one onsite interview (4 technical + 1 lunch interview), 1 technical interview is coding : 4 sum, 1 technical interview is on probability and statistics : prisoners dilemma, one big data question, 1 technical interview is on machine learning : how to design product recommendation system based on taxonomy, basic questions about classification, precision recall etc. 1 technical interview is with hiring manager, implement queue with stack or the other way around, introduction to the team.
It was not that bad, 3 initial rounds overall okay, it would have been nice if they added some more depth in questions and asked good questions.
and it would have been great if they call or tell something before interview.
A former colleague referred me to the data scientist position, and I was excited to dive in. The interview process was intense, starting with a phone screen that led to a technical round focused on SQL and experiment design. I was asked to write a complex SQL query and design an experiment for a forecasting model. Lucky timing — I had reviewed similar questions on prachub.com during my prep, which really helped boost my confidence. After a final behavioral round, I received an offer and happily accepted.
Interview questions [2]
Question 1
Write a SQL query using window functions to find, for each product category, the item with the highest month-over-month sales growth
terrible Data Scientist role interview process, took 3 months and got rejected after final interview where the interviewer didn't have my resume and asked something else which the recruiter did not mention to prepare