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Data Scientist Interview Questions

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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

Python and SQL challenges via HackerRank Including: - How many edges does a fully connected (or complete) graph have? Multiple choice - What is the fundamental difference between k-means clustering and KNN? Multiple choice - Which command would be used to ensure any local tracked changes are also shared amongst remote repositories? Multiple choice - Given 2 fair 6-sided dice and a fair coin, what is the probability of rolling a combined score of 7 with the dice and having the coin show heads after tossing? Multiple choice - Given data matrix X of shape n x d and transformation matrix sigma of shape d x k, which matrix multiplications will produce a transformed data matrix Xdash of shape n x k? Multiple choice - The sigmoid function is defined. What does its value tend to as its input x moves towards negative infinity? Multiple choice - SQL challenge of 2 tables with example answer, typed answer in SQL language of choice required - You are playing a card game with three cards. Both sides of one card are black, both sides of another are white, and the remaining card has one black side and one white side. You pick a card at random and see it has a black side face-up. What is the probability that the other side of the card is white? Multiple choice - 'Descending Mount Trigonometry' question - code your own answer
avatar

Data Scientist

Interviewed at NatWest Group

4★
Jun 9, 2022

Python and SQL challenges via HackerRank Including: - How many edges does a fully connected (or complete) graph have? Multiple choice - What is the fundamental difference between k-means clustering and KNN? Multiple choice - Which command would be used to ensure any local tracked changes are also shared amongst remote repositories? Multiple choice - Given 2 fair 6-sided dice and a fair coin, what is the probability of rolling a combined score of 7 with the dice and having the coin show heads after tossing? Multiple choice - Given data matrix X of shape n x d and transformation matrix sigma of shape d x k, which matrix multiplications will produce a transformed data matrix Xdash of shape n x k? Multiple choice - The sigmoid function is defined. What does its value tend to as its input x moves towards negative infinity? Multiple choice - SQL challenge of 2 tables with example answer, typed answer in SQL language of choice required - You are playing a card game with three cards. Both sides of one card are black, both sides of another are white, and the remaining card has one black side and one white side. You pick a card at random and see it has a black side face-up. What is the probability that the other side of the card is white? Multiple choice - 'Descending Mount Trigonometry' question - code your own answer

To create a network graph from a log file in 20 mins. Guess the interviewer wanted a simple dictionary as a data structure but confused me with calling it a network graph repeatedly. If he indeed wanted it like a graph where all properties such as pre order , in order traversal could be applied. It's no way a 20 min question.
avatar

Data Scientist

Interviewed at Meta

3.6★
Mar 17, 2018

To create a network graph from a log file in 20 mins. Guess the interviewer wanted a simple dictionary as a data structure but confused me with calling it a network graph repeatedly. If he indeed wanted it like a graph where all properties such as pre order , in order traversal could be applied. It's no way a 20 min question.

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