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Data Science Interview Questions › Category: Data Science
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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 3 months ago • 
10629 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 4 years ago • 
7874 views6 answers0 votes
What is selection bias, why is it important and how can you avoid it?
MockInterview asked 4 years ago • 
2491 views2 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 8 months ago • 
222 views1 answers0 votes
[Facebook SQL data science and data engineer] Evaluate the performance of ads campagins through fill rate
MockInterview asked 8 months ago • 
247 views1 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 4 years ago • 
2568 views6 answers0 votes
[SQL] use correlated subquery to find all employees whose salary is above average for their department
MockInterview asked 10 months ago • 
279 views2 answers0 votes
You're a data scientist at a prominent logistics company. Your team has estimated that on average the company experiences 0.1 equipment failures per day. What is the most suitable distribution that you could use to model equipment failures for 365 days?
MockInterview asked 10 months ago • 
612 views1 answers0 votes
What does the term 'multiple testing' relate to?
MockInterview asked 10 months ago • 
245 views1 answers0 votes
[Amazon interview] what is the difference between random forest vs cart tree; XGBoost vs RF?
MockInterview asked 1 year ago • 
381 views0 answers0 votes
[Amazon interview] What is a p-value? What are its shortcomings?
MockInterview asked 1 year ago • 
379 views0 answers0 votes
[Amazon Interview] What are the first 3 things you do when given a (clean) dataset and why?
MockInterview asked 1 year ago • 
385 views0 answers0 votes
[Amazon Interview] What are your strengths and weaknesses as a data scientist?
MockInterview asked 1 year ago • 
325 views0 answers0 votes
How would you detect bogus accounts on facebook?
MockInterview asked 4 years ago • 
797 views1 answers0 votes
value-for-money
ken asked 1 year ago • 
468 views0 answers1 votes
[SQL] How to keep a nightly count of songs listened by users based on a real-time transaction table. See Description:
MockInterview asked 4 years ago • 
4572 views3 answers0 votes
[SQL] Write an SQL query that makes recommendations using the pages that your friends liked. Assume you have two tables: a two-column table of users and their friends, and a two-column table of users and the pages they liked. It should not recommend pages you already like.
MockInterview asked 4 years ago • 
9419 views6 answers0 votes
[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 4 years ago • 
7261 views4 answers0 votes
What is the difference between Supervised and Unsupervised machine learning models?
MockInterview asked 2 years ago • 
827 views2 answers0 votes
[Probability] You're about to get on a plane to Seattle. You want to know if you should bring an umbrella. You call 3 random friends of yours who live there and ask each independently if it's raining. Each of your friends has a 2/3 chance of telling you the truth and a 1/3 chance of messing with you by lying. All 3 friends tell you that "Yes" it is raining. What is the probability that it's actually raining in Seattle?
MockInterview asked 4 years ago • 
7559 views5 answers0 votes
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