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Data Scientist Interview Questions

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Data Scientist Interview Questions

Lors d’un entretien pour le poste de data scientist, les employeurs vont poser des questions leur permettant d’évaluer vos compétences en modélisation des données, résolution des problèmes et programmation. Soyez préparé à répondre à des questions générales testant vos connaissances en statistiques et en science des données. Vous devez également être prêt à répondre à des questions ouvertes permettant de tester votre créativité, vos compétences en communication et votre éducation formelle en modélisation des données et en programmation.

Questions d'entretien d'embauche fréquentes pour un data scientist (H/F) et comment y répondre

Question 1

Question 1 : Quelles techniques de modélisation des données préférez-vous et pourquoi ?

How to answer
Comment répondre : La transformation des données en informations compréhensibles et exploitables est un élément critique du métier de data scientist. Cette question permet aux employeurs de comprendre vos compétences en modélisation des données et votre cursus. Répertoriez et détaillez les techniques de modélisation des données que vous préférez, notamment leurs avantages comme leur facilité d’utilisation, leur flexibilité, etc.
Question 2

Question 2 : Comment détectez-vous les faux comptes Instagram utilisés pour escroquer les clients ?

How to answer
Comment répondre : Ce type de question permet à un employeur de tester vos compétences en résolution des problèmes. Lorsque vous répondez à des questions ouvertes comme celle-ci, n’hésitez pas à demander des précisions sur ces dernières et à utiliser un tableau pour présenter vos compétences en programmation et création de graphiques. Partagez votre processus de réflexion lorsque vous résolvez le problème.
Question 3

Question 3 : Décrivez des situations qui requièrent une liste, un uplet ou un ensemble sur Python.

How to answer
Comment répondre : Les intervieweurs posent ce type de question pour tester vos compétences en programmation sur Python. Révisez les rudiments de Python comme les listes, les uplets et les ensembles avant votre entretien. Vous devez être en mesure d’expliquer à quel moment et de quelle manière chaque outil est utilisé par les data scientists.

54,205 data scientist interview questions shared by candidates

The company developed a new feature and perform A/B test. Here is the result Comments +5% Likes -10% Timespent +1% All else neutral How would you decide to whether putting into product based on the A/B test result? Any ideas?
avatar

Data Scientist

Interviewed at Meta

3.6★
Jun 8, 2017

The company developed a new feature and perform A/B test. Here is the result Comments +5% Likes -10% Timespent +1% All else neutral How would you decide to whether putting into product based on the A/B test result? Any ideas?

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.
avatar

Data Scientist

Interviewed at Meta

3.6★
Jul 17, 2016

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.

There's a game where you are given two fair six-sided dice and asked to roll. If the sum of the values on the dice equals seven, then you win $21. However, you must pay $5 to play each time you roll both dice. Do you play this game? And in follow-up: What is the probability of making money from this game?
avatar

Data Scientist

Interviewed at Meta

3.6★
Nov 24, 2016

There's a game where you are given two fair six-sided dice and asked to roll. If the sum of the values on the dice equals seven, then you win $21. However, you must pay $5 to play each time you roll both dice. Do you play this game? And in follow-up: What is the probability of making money from this game?

SQL question: given a table of interaction between users (user_a | user_b | day), find number of users who had more than 5 interactions yesterday (assume there is only one unique interaction between a pair of users per day). Product Question: A user satisfaction survey was conducted for two groups of facebook users (each with 50 k sample size). Group1: who had enabled certain login security features Group 2: who had not enabled these security features. It was found that user satisfaction with group1 was 30% lower than with group 2. Why do you think so? Comment on how the survey was conducted?
avatar

Data Scientist

Interviewed at Meta

3.6★
May 11, 2018

SQL question: given a table of interaction between users (user_a | user_b | day), find number of users who had more than 5 interactions yesterday (assume there is only one unique interaction between a pair of users per day). Product Question: A user satisfaction survey was conducted for two groups of facebook users (each with 50 k sample size). Group1: who had enabled certain login security features Group 2: who had not enabled these security features. It was found that user satisfaction with group1 was 30% lower than with group 2. Why do you think so? Comment on how the survey was conducted?

Given a table with columns country (with two-letter country abbreviation), count of requests sent, percentage of requests sent failed, condense down to this data grouped by country: country (one row per country), total count of requests sent, total count of requests sent failed.
avatar

Data Scientist

Interviewed at Meta

3.6★
Apr 29, 2019

Given a table with columns country (with two-letter country abbreviation), count of requests sent, percentage of requests sent failed, condense down to this data grouped by country: country (one row per country), total count of requests sent, total count of requests sent failed.

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