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?
Data Scientist Interview Questions
Data Scientist Interview Questions
In un colloquio per Data scientist, ti verranno poste domande volte a verificare le tue capacità di data modeling, risoluzione di problemi e programmazione. Preparati a rispondere a domande di carattere generale che valutano la tua conoscenza della statistica e della scienza dei dati. Dovresti inoltre prepararti a rispondere a domande aperte mirate a testare la tua creatività, le tue doti comunicative e la tua formazione nella programmazione e modellazione dei dati.
Domande tipiche dei colloqui per Data scientist e come rispondere
Question 1
Domanda 1: Quali tecniche di data modeling preferisci e perché?
How to answer
Come rispondere: Trasformare i dati in informazioni comprensibili e fruibili è un aspetto fondamentale del lavoro di Data scientist. Con questa domanda i datori di lavoro vogliono capire il tuo backgruond e valutare le tue capacità di data modeling. Elenca e illustra le tecniche di data modeling che preferisci, includendo vantaggi come semplicità d'uso, flessibilità, ecc.
Question 2
Domanda 2: Come rilevi gli account Instagram fasulli utilizzati per raggirare i consumatori?
How to answer
Come rispondere: Domande come questa permettono ai selezionatori di testare le tue capacità di risolvere i problemi. Quando rispondi a domande aperte di questo tipo, non esitare a chiedere chiarimenti o a usare lavagne per dimostrare le tue abilità nel tracciare diagrammi e usare codici. Condividi il tuo processo di pensiero mentre elabori il problema.
Question 3
Domanda 3: Descrivi quali circostanze richiedono una lista, una tupla o un set in Python.
How to answer
Come rispondere: I selezionatori ti porranno domande come questa per testare le tue abilità di programmazione in Python. Ripassa gli elementi fondamentali di Python, come liste, tuple e set prima del colloquio. Dovrai essere in grado di spiegare quando e come ogni strumento deve essere usato da un Data scientist.
54,189 data scientist interview questions shared by candidates
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?
How do you calculate monthly active users, churned users and resurrected users from a user activity log with userID and DateTime
data question: dialoglog (userid int appid int type char , a flag either "imp" or "click" ds timestamp ) How would you access the quality of app? How to compute click-through rate (in mySQL)?
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 of friend requests sent and friend requests received, find the user with the most friends.
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.
Mostly situational.. guesstimate and SPSS related questions to mark proficiency in statictics and visualizations.
Given a series of tables; write the SQL code you would need to count subpopulations through joins.
Viewing 21 - 30 interview questions
See Interview Questions for Similar Jobs
Data EngineerMachine Learning EngineerStatistical Modeling AnalystQuantitative ResearcherData Mining EngineerData AnalystAnalytics ConsultantAnalytics ManagerBusiness Intelligence AnalystMachine Learning ScientistQuantitative AnalystData ScienceResearch ScientistData ModelerData ConsultantData Mining AnalystComputational BiologistModeling EngineerStatistical Consultant