Machine learning research scientist sollicitatievragen

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Sollicitatievragen voor Machine Learning Research Scientist gedeeld door sollicitanten

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Amazon
Er werd een Research Scientist, Machine Learning gevraagd...1 september 2018

Describe a project where things didn't work out as expected.

1 antwoorden

Gave example

Amazon

You have a linked list of numbers, how would you return the median ? Follow up, what is the worst case performance?

1 antwoorden

Basic data structures. Sorting algorithm. Calculate indices used to return or compute the median. Use indices in loop. Minder

Bloomberg L.P.

More on machine learning algorithms. Easy coding question

1 antwoorden

Can you provide more details on the questions please?

Amazon

You have a singly linked list, how would you find the median?

1 antwoorden

Sort it (choose an algorithm), calculate index for median, loop over next based on index. They will want to actually discuss implementation (i.e. use a for loop, traverse next ptr, etc.). You should also know algorithmic complexity (big-O notation). Minder

Bloomberg L.P.

After you have decided which features to use, describe the process of constructing feature-vectors

1 antwoorden

It was almost all about tf-idf vectorizer

Amazon

Describe a project where there were multiple alternatives from which to choose in implementing it.

1 antwoorden

Gave examples from work history.

Rocket Fuel

'''Question 1: Given a sorted but rotated array, and a target, find the location of the target in the array. If the target is not in the array, returns -1 1) INPUT: [3,6,7,1,2], target = 1 OUTPUT: 3 2) INPUT: [3,6,7,1,2], target = 9 OUTPUT: -1 '''

1 antwoorden

def search(A, target): if target == None: return -1 #if not target: # return -1 #riht I needed to address this! try: target = int(target) except ValueError: return -1 l=0 n = len(A) r = n-1 while l<=r: middle=l+((r-l)/2) if A[middle] == target: return middle if A[l] <= A[middle]: if ((A[l]<= target) and (target Minder

Amazon

If you were designing a robot lawnmower, where would you start?

1 antwoorden

They will ask you about how specifically you implement the perception algorithms, what sensors you will use, and where you put the sensors. They were more interested in computer vision. Minder

Meta

Very simple coding questions were asked

1 antwoorden

I was able to solve and optimise all the questions, however I did not make the round. Minder

Amazon

If you were designing a robot lawn mower, where would you start? Various follow ups including sensors, limited to cameras, where mounted? How would you recognize people? Describe skeletal model?

1 antwoorden

This was basically describe the technical solution and they wanted also to know specifically how I would implement them. Minder

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