Data Science Interview with a PayPal Data Scientist (Roman Numeral)




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This is a 45-minute mock interview of a technical data scientist phone screening. Interested in free mock data science interviews like this video? Check out www.Topds.io and contact founders@topds.io to book a session.

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Comment List

  • Topds
    January 13, 2021

    Is this a real interview? Cuz this made me feel so much more comfortable with an entry level data scientist interview. Someone hire me lol!

  • Topds
    January 13, 2021

    so, did he pass the interview?

  • Topds
    January 13, 2021

    Has the interviewee taken a stats class?

  • Topds
    January 13, 2021

    def rom(num):

    show = []

    num_sum = num

    for i in roman:

    while num_sum – i >= 0:

    show.append(roman[i])

    num_sum -= i

    print(''.join(show))

    I came up with this, its more efficient. Roman is the dict.
    roman = {
    1000: 'M',
    900: 'CM',
    600: 'DC',
    500: 'D',
    400: 'CD',
    100: 'C',
    90: 'XC',
    60: 'LX',
    50: 'L',
    40: 'XL',
    10: 'X',
    9: 'IX',
    6: 'VI',
    5: 'V',
    4: 'IV',
    1: 'I'
    }

  • Topds
    January 13, 2021

    Would he pass this interview if it was a real one?

  • Topds
    January 13, 2021

    Hi, do make more videos man. I am working as a Data Analyst and I want to switch to DS in a few years.

  • Topds
    January 13, 2021

    This is absurd . You cannot expect a data scientist to be proficient in Data structure and algorithms the way a typical software engineer need to be . This kind of selection by competitive coding does not prove a candidate's data science skills .

  • Topds
    January 13, 2021

    more please!

  • Topds
    January 13, 2021

    It bothers me that the interviewer didn’t have him check his function. He also sounds like he’s just reading notes. I don’t think he really knows what he’s talking about

  • Topds
    January 13, 2021

    Thank you so much! Although I wouldn't say this was that easy. You did a great job

  • Topds
    January 13, 2021

    Please upload more data science interviews for a senior level person..

  • Topds
    January 13, 2021

    Data scientist postions almost never have coding tests like these, they ask you to do a take home assignment and then ask alot of statistics

  • Topds
    January 13, 2021

    This is a data science interview? damn this is easy

  • Topds
    January 13, 2021

    keep em comin!!

  • Topds
    January 13, 2021

    fake hai

  • Topds
    January 13, 2021

    The p value isn't necessarily going to get bigger or smaller with an increased sample size. It depends on whether the samples you pick up later reflect well on your null hypothesis or not.

  • Topds
    January 13, 2021

    Hi there! As someone who's in the onsite process of Data Scientist interviews, the trend I'm seeing is 'modelling' questions being the primary focus of the technical test (makes sense in a way). I was just curious if that's something you could cover? Obviously they can be industry-dependent, but even just one supervised learning example, one unsupervised learning ex, an NLP-specific problem. Something like that?

  • Topds
    January 13, 2021

    thanks for sharing

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