# 310

Machine Learning Scientist interview questions shared by candidates

## Top Interview Questions

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Machine Learning Scientist was asked...21 February 2020

### Probability, conventional machine learning, deep learning, coding/algorithm, behavioral

I was good with most of the questions

Can you share how coding round was? what type of questions were asked?

Can you share what they asked in the coding round?

### How do you weight 9 marbles three times on a balance scale to select the heaviest one.

Do they all have the same weight except for one?

I think the question is the rest of the 8 balls are the same weight. In that case you can find the heaviest in 2 tries. Less

First weight 4 vs 4. If they're the same =&gt; the last one is the haviest. If not, weight 2 vs 2 of the haviest 4. Then weights 1 vs 1 of the haviest 2. Less

### Fix a piece of sh*t code that just request data and save it to MySql. Super easy and easy to fix so I don't know what is the point of the interview. Totally a sh*t experience.

Can you please provide details of the technical round?

Super easy, it didn't need a master student to do it. So I don't want to remember it since it makes no sense. Less

### Given a number, how to find a closest number in a series of floating point data.

Use a Binary Tree data structure. It is sorted while it stores the elements. Then traverse the tree. Search is log N. In Java there is a ceiling and floor function which does a BFS traversal and tries to search the closest number rounded off, to the nearest below or above number on the basis of ceiling or Floor function. Less

Just loop over the series. Calculate abs(ref_num-x_i). Remember index of last seen lowest abs difference. In the end just return the element at the index you have saved to the end. \theat(n) time \theta(1) space additionaly (besides space for series) Less

### 1- Machine Learning concepts 2- Data Structure Case Study (Very easy) 3- Coding (Easy but they need hands-on exp) And Finally, Leadership (14 principles)

There is no right answer except for conceptual one. They need you to be natural and be good in what you do. I would suggest to do following: 1- Leadership 2- Coding 3- ML concepts Less

Forgot to add, my feedback was mixed saying I need more Machine Learning knowledge (which I disagree) and hands-on coding (which killed my interview)! Less

### An online exam that takes about 2 hours. Most of the material is about deep learning and machine learning. Most of the answers can be found on the coursera class of machine learning and deep learning.

Hi, I have an interview test with deeplearning.ai. It says there's some video answering section at the end. any comments or suggestions for it? Less

### Coding challenge prompt: Please send us an original code sample, the code should reflect the skills listed in the job requirements with base Python manipulations using the ML frameworks (Tensorflow, SKLearn, Keras, PyTorch).

We appreciate your feedback. Sorry you had a negative experience. We evaluate each code sample carefully and apologize for any delay as we’re a growing team handling large influxes of applications for all positions. Code quality is very important to us and we appreciate the effort and time you put into the application process. Less

### we discussed mainly my background and some of the works I did, but she was not able to understand most of them. She was constantly interrupting me and trying to change the subject. The part that really got in her nerve was when I did not know what is 'original content". She explained that she means shows like "Orange is the new black", etc. which I do not watch. It was completely incomprehensible for her that some people may spend their time reading papers, or help their church high school kids instead watching fictional stories about women in prison.

If you want to pass the initial phone screen, make sure you know what is "original content" ! Less