I applied online. The process took 3 weeks. I interviewed at Unified (New York, NY) in Nov 2017
Interview
Two Phone Screenings, coding challenge, a third phone screening, then an on-site. The whole process took less than three weeks. They responded very quickly to my emails and accommodated my schedule well.
Interview questions [1]
Question 1
After the phone screenings and the technical interview, the questions seemed to be mostly cultural. The technical questions were pretty standard.
I applied online. The process took 3 months. I interviewed at Unified (New York, NY) in Jan 2018
Interview
Process was:
1. Applied via LinkedIn
2. Phone screen about a month later
3. 3 question code test (2 SQL questions, 1 python)
4. On-site with 7 people over the span of 3 hours
5. Next day rejection.
For the onsite, the questions after the first technical interview were primarily behavioral.
Interview questions [5]
Question 1
(ML) Can you give an example when accuracy isn't a good metric to use?
(Python) Given a string separated by a space, how do you reverse the string while keeping the positions of the individual words? (I provided a solution using map, but they also requested this using a list comprehension)
(SQL) About 2-3 sql questions. I can't remember exactly what they were, but similar to:
Given some table with company_id, campaign_id, and something_else and another table with campaign_id, and spend, how much has each company spent?
They then provided another table that was structured differently and asked the question above.
(Probability) Imagine we're playing a game where you roll a fair die, and you receive the amount that appears on the die. How much are you willing to pay to play the game?
Now, imagine your given the option to roll one more time. What's the optimal strategy to play?
I applied online. The process took 1 week. I interviewed at Unified
Interview
Pretty straight foward. Interview with a few of the analysts, the manager, and CTO. The tough part is the coding portion. I'd suggest practicing with the codility lessons before attempting the exam. I screwed up my interview because I wasn't used to the way the problems were assessed. You'll really have to be concerned with all types of inputs, empty lists, etc... Recommend practicing all of the lessons to get an idea of how the assessment works. All in all, a fair interview.
