Data Science Interview Questions

Welcome to MockInterview.co‘s Data Science Interview Questions library! (300+ questions & growing)

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  1. Prepare: You can browse through these questions set to prepare for your data science interviews.
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  3. Post Answers: you can post your answers to get feedback from the community.

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[SQL] Given two tables Friend_request (requester_id, sent_to_id , time) Request_accepted (acceptor_id, requestor_id, time) Find the overall acceptance rate of requests.
MockInterview asked 6 years ago • 
8352 views6 answers0 votes
What is “data science” in your own words?
MockInterview asked 6 years ago • 
799 views7 answers0 votes
How can outlier values be treated?
Paras answered 6 months ago • 
656 views2 answers0 votes
Do gradient descent methods at all times converge to similar point?
MockInterview asked 6 years ago • 
1272 views3 answers-2 votes
BOTH BEING TREE BASED ALGORITHM, HOW IS RANDOM FOREST DIFFERENT FROM GRADIENT BOOSTING ALGORITHM (GBM)?
MockInterview asked 5 years ago • 
35294 views2 answers0 votes
What is the curse of dimensionality?
MockInterview asked 6 years ago • 
1075 views2 answers0 votes
You are assigned a new project which involves helping a food delivery company save more money. The problem is, company’s delivery team aren’t able to deliver food on time. As a result, their customers get unhappy. And, to keep them happy, they end up delivering food for free. Which machine learning algorithm can save them?
MockInterview asked 6 years ago • 
2088 views2 answers1 votes
MNC Case study
Anam Fatima asked 2 years ago • 
510 views0 answers0 votes
[Probability] There are four people in a room that haven't met before. They are told to shake hands, exactly once, of every other person in the room so that they all meet each other. If each of these people shake their hands with every other person exactly once then how many handshakes are going to occur?
MockInterview asked 6 years ago • 
3771 views8 answers0 votes
How would you validate a model you created to generate a predictive model of a quantitative outcome variable using multiple regression.
MockInterview answered 2 years ago • 
1270 views0 answers0 votes
What is relation between Bagging-Boosting and Bias-Variance?
MockInterview asked 4 years ago • 
940 views2 answers0 votes
What is standard error? Explain with example.
Paras Doshi asked 4 years ago • 
1221 views1 answers0 votes
What is the difference between margin of error and confidence interval?
Paras Doshi asked 4 years ago • 
1217 views1 answers0 votes
Case study: Walk me through how would you predict who will renew their subscription next month? What data would you need to solve this? What analysis would you do? Would you build predictive models? If so, which algorithms?
MockInterview answered 2 years ago • 
12170 views3 answers0 votes
[Probability] There are 50 cards of 5 different colors. It comprises of 10 Red cards, 10 blue cards, 10 orange cards, 10 green cards and 10 yellow cards. Each color will have the cards numbered between 1 to10. You pick 2 cards at random. What is the probability that they are not of same color and not of same number.
MockInterview asked 6 years ago • 
10832 views6 answers0 votes
[Facebook data engineer coding interview] remove duplicates from an array/list
Pythin asked 3 years ago • 
751 views1 answers0 votes
[Facebook data engineer coding] Write a function that, given a string representing a sentence, returns the sentence with the words in the same order but the letter in each word reversed.
MockInterview asked 3 years ago • 
658 views3 answers0 votes
What is selection bias, why is it important and how can you avoid it?
MockInterview asked 6 years ago • 
3463 views2 answers0 votes
What is database index and why do we use it?
MockInterview asked 2 years ago • 
683 views1 answers0 votes
Coding Interview: Write a function that, given a string representing a sentence, returns the sentence with the words in the same order but the letter in each word reversed.
python asked 3 years ago • 
673 views1 answers0 votes
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