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Data Scientist Interview Questions

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Data Scientist Interview Questions

In een sollicitatiegesprek voor de functie data scientist (M/V/X) kunt u verwachten dat de werkgever vragen stelt die uw vaardigheden voor gegevensmodellering, probleemoplossing en programmeren onderzoeken. Wees voorbereid op algemene vragen die uw kennis van statistiek en data science. Stel u ook in op open vragen die uw creativiteit, sociale vaardigheden en formele opleiding in gegevensmodellering en programmeren testen.

Meest gestelde sollicitatievragen voor een data scientist (M/V/X) en hoe te antwoorden

Question 1

Vraag 1: Welke gegevensmodelleertechnieken hebben uw voorkeur en waarom?

How to answer
Zo antwoordt u: Gegevens vertalen naar begrijpelijke en bruikbare informatie, is een essentieel onderdeel van de rol van een data scientist. Met deze vraag kunnen werkgevers uw gegevensmodelleringsvaardigheden en achtergrond doorgronden. Noem de voor u preferente gegevensmodelleringstechnieken en bespreek deze, bijvoorbeeld voordelen als gebruiksgemak, flexibiliteit, etc.
Question 2

Vraag 2: Hoe zou u nepaccounts op Instagram detecteren die gebruikt worden om consumenten op te lichten?

How to answer
Zo antwoordt u: Met zulke vragen kan een werkgever uw probleemoplossend vermogen testen. Bij het beantwoorden van open vragen als deze, is het prima om zelf naar verduidelijking te vragen en een whiteboard te gebruiken om te laten zien dat u kunt programmeren en dat u diagrammen kunt maken. Deel uw gedachtegang terwijl u de stappen van het probleem behandelt.
Question 3

Vraag 3: Beschrijf omstandigheden die een lijst, tupel of set in Python vereisen.

How to answer
Zo antwoordt u: Vraagstellers gebruiken dergelijke vragen om uw kennis van de programmeertaal Python te testen. Ga voor het sollicitatiegesprek de grondbeginselen van Python, zoals lijsten, tupels en sets. U zou moeten kunnen uitleggen wanneer en hoe elke tool door data scientists wordt gebruikt.

54,341 data scientist interview questions shared by candidates

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

3.5★
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.

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

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