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Data Science interview questions

DevSkiller’s team produces Data Science interview questions for assisting recruiters aiming to hire Data scientists. Our tests are designed to ensure you find the perfect candidate through our unique range of challenges and questions.

We implement RealLifeTesting™ into our Data Science interview questions. This methodology is designed to simulate real-world scenarios and present candidates with realistic problems to solve. RealLifeTesting™ is a pioneering method for developer recruitment. Let us help you find your next Data scientist today, using our range of Data Science interview questions.

Python
MIDDLE
Testede færdigheder
Varighed
70 minutter max.
Evaluering
Automatisk
Testoversigt

Spørgsmål efter valg

vurdering af viden om Python, Gnist

Programmeringsopgave - Niveau: Medium

Python | PySpark | Customer Preference Model - Implementer en datateknisk applikation til forbehandling af markedsføringsdata.

Python
MIDDLE
Testede færdigheder
Varighed
104 minutter max.
Evaluering
Automatisk
Testoversigt

Spørgsmål efter valg

vurdering af viden om Keras, Maskinlæring, Python

Programmeringsopgave - Niveau: Medium

Python | NLP, Keras | Sentimentanalyse af kundeanmeldelser - Udfør en sentimentanalyse og tagging af kundeanmeldelser af film og flyselskaber ved hjælp af en neuronal netværksmodel med flere output.

Python
MIDDLE
Testede færdigheder
Varighed
72 minutter max.
Evaluering
Automatisk
Testoversigt

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vurdering af viden om Maskinlæring, Forstærkningsindlæring

Programmeringsopgave - Niveau: Medium

Python | PyTorch | Reinforcement Learning | Deep Q-Network - Færdiggør implementeringen af DQN-algoritmen.

Python
JUNIOR
Testede færdigheder
Varighed
65 minutter max.
Evaluering
Automatisk
Testoversigt

Spørgsmål efter valg

vurdering af viden om Python

Programmeringsopgave - Niveau:

Python | PySpark | ML Logs Transformer - Færdiggør implementeringen af logtransformationspipeline.

Scala
JUNIOR
Testede færdigheder
Varighed
66 minutter max.
Evaluering
Automatisk
Testoversigt

Spørgsmål efter valg

vurdering af viden om Scala

Programmeringsopgave - Niveau:

Scala | Spark | ML Logs Transformer - Færdiggør implementeringen af loggenes transformationspipeline.

Datalogi
JUNIOR
Testede færdigheder
Varighed
45 minutter max.
Evaluering
Automatisk
Testoversigt

Opgave - Niveau: Let

SQL | Frimærkekatalog | De tre højeste priser - Vælg tre frimærker (pris og navn) med den højeste pris.

Programmeringsopgave - Niveau:

Python | Pandas | HTML table parser - Implementer en funktion til at konvertere HTML-tabellen til en CSV-fil.

Python
JUNIOR
Testede færdigheder
Varighed
35 minutter max.
Evaluering
Automatisk
Testoversigt

Spørgsmål efter valg

vurdering af viden om Python

Programmeringsopgave - Niveau:

Python | Pandas | HTML table parser - Implementer en funktion til at konvertere HTML-tabellen til en CSV-fil.

Python
JUNIOR
Testede færdigheder
Varighed
63 minutter max.
Evaluering
Automatisk
Testoversigt

Spørgsmål efter valg

vurdering af viden om Maskinlæring, PyTorch

Programmeringsopgave - Niveau:

Python | PyTorch, Computer Vision | Model Builder - Færdiggør implementeringen af en modeltræningspipeline.

Python
MIDDLE
Testede færdigheder
Varighed
120 minutter max.
Evaluering
Automatisk
Testoversigt

Spørgsmål efter valg

vurdering af viden om Python

Programmeringsopgave - Niveau: Medium

Python | Rapport om salg af køretøjer - Implementer en applikation til at oprette rapporter baseret på datalageret om salg af køretøjer.

Python
MIDDLE
Testede færdigheder
Varighed
96 minutter max.
Evaluering
Automatisk
Testoversigt

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vurdering af viden om Python

Programmeringsopgave - Niveau: Medium

Python | Pandas | En startupvirksomhed, der leverer mad - Omdan en database med ordrer ved at reducere dens dimensionalitet og oprette en ekstra analytisk tabel.

Python
JUNIOR
Testede færdigheder
Varighed
45 minutter max.
Evaluering
Automatisk
Testoversigt

Spørgsmål efter valg

vurdering af viden om Python

Programmeringsopgave - Niveau:

Python | Client Base Creator - Implementer programmet til at hente kundens kontaktdata fra chatbeskederne.

Python
MIDDLE
Testede færdigheder
Varighed
70 minutter max.
Evaluering
Automatisk
Testoversigt

Spørgsmål efter valg

vurdering af viden om Maskinlæring, Python

Programmeringsopgave - Niveau: Medium

Python | DNA Analyzer | Opret og rens DNA-strenge - Implementer 2 metoder i Python, der opretter og renser DNA-strenge.

Python
JUNIOR
Testede færdigheder
Varighed
49 minutter max.
Evaluering
Automatisk
Testoversigt

Spørgsmål efter valg

vurdering af viden om Maskinlæring

Programmeringsopgave - Niveau:

Python | DNA Analyzer - Implementer en metode i Python, der genererer en statistisk DNA-rapport.

NumPy
MIDDLE
Testede færdigheder
Varighed
80 minutter max.
Evaluering
Automatisk
Testoversigt

Spørgsmål efter valg

vurdering af viden om *SQL

Programmeringsopgave - Niveau: Medium

Python | NumPy | Databehandling af flymålinger - Komplet databehandlingsprogram, der aggregerer og komprimerer datastrømme ved hjælp af NumPy, Python og Data Analysis.

Python
JUNIOR
Testede færdigheder
Varighed
54 minutter max.
Evaluering
Automatisk
Testoversigt

Spørgsmål efter valg

vurdering af viden om SQL

Programmeringsopgave - Niveau:

Python | DNA Analyzer - Implementer en metode i Python, der genererer en statistisk DNA-rapport.

Python
MIDDLE
Testede færdigheder
Varighed
70 minutter max.
Evaluering
Automatisk
Testoversigt

Spørgsmål efter valg

vurdering af viden om Python

Programmeringsopgave - Niveau: Medium

Python | NumPy | Databehandling af flymålinger - Komplet databehandlingsprogram, der aggregerer og komprimerer datastrømme ved hjælp af NumPy, Python og Data Analysis.

Python
MIDDLE
Testede færdigheder
Varighed
80 minutter max.
Evaluering
Automatisk
Testoversigt

Spørgsmål efter valg

vurdering af viden om Maskinlæring, Python

Programmeringsopgave - Niveau: Medium

Python | DNA Analyzer | Opret og rens DNA-strenge - Implementer 2 metoder i Python, der opretter og renser DNA-strenge.

Python
MIDDLE
Testede færdigheder
Varighed
80 minutter max.
Evaluering
Automatisk
Testoversigt

Spørgsmål efter valg

vurdering af viden om Maskinlæring, Python

Programmeringsopgave - Niveau: Medium

Python Data Extraction, Processing - Færdiggør og opdaterer koden til programmet, der udtrækker og behandler PDF-filer og konverterer dem til et bestemt format til visning/output.

Android
MIDDLE
Testede færdigheder
Varighed
102 minutter max.
Evaluering
Automatisk
Testoversigt

Spørgsmål efter valg

vurdering af viden om Maskinlæring, Android

Programmeringsopgave - Niveau: Medium

Android | Login på sociale netværk - Implementer manglende sektioner af LoginActivity og MainActivity, LoginManager og CredentialsStorage.

Recommended roles for Data Science interview questions

  • Junior dataforsker
  • Dataforsker i midten
  • Senior dataforsker
  • Ingeniør i maskinlæring
  • Videnskabsmand inden for maskinlæring
  • Applikationsarkitekt
  • Virksomhedsarkitekt
  • Dataarkitekt
  • Infrastrukturarkitekt
  • Dataingeniør
  • Business intelligence-udvikler
  • Dataanalytiker

How our Data Science interview questions work

The driving force behind DevSkiller Data Science interview questions is the RealLifeTesting™ methodology. It powers our unique approach to developer testing. RealLifeTesting™ functions around the principle that to get the best out of a developer, you need to present them with challenges similar to their everyday work. We use RealLifeTesting™ to simulate a developer’s work environment and then set them realistic challenges to overcome. In this way, we are able to offer you a thorough overview of a developer candidate’s strengths and weaknesses from the initial screen stage of recruitment.

Say goodbye to endless hours of monotonous, in-house testing. At Devskiller, we can offer you a clear understanding of your applicants’ knowledge, coding ability, critical thinking, and time-management skills. Our testing method works remotely and efficiently, saving you hours of time and effort during the recruitment process.

Vigtigste funktioner

  • DevSkiller Data Science interview questions provide a holistic view of an applicant’s coding skills, not just their academic knowledge.
  • Fjerntest, der sparer dig tid og penge.
  • The RealLifeTesting™ methodology offers a greater user experience where candidates can use their own IDE, clone to GIT, run unit tests, and access Stack Overflow/GitHub/Google for research.
  • We provide test assurance with strict anti-plagiarism tools enforced
  • Overvåg individuelle tests i realtid
  • Automatiserede resultater, som ikke-tekniske fagfolk kan forstå
  • Prøver til rådighed for alle erfaringsniveauer

Skills covered in our Data Science interview questions

  • Datateknik
  • datavidenskab
  • ETL
  • PySpark
  • Python
  • Scala
  • Analyse af data
  • HSQL
  • DB
  • MySQL
  • Pandaer
  • SQL
  • Computer Vision
  • Maskinlæring
  • PyTorch
  • Dataanalyse med Python
  • SQLite
  • Dimensionel modellering
  • Python 3.x
  • Datastrukturer
  • NumPy
  • Android
  • udtrækning af data
  • OCR
  • PDF-behandling

What to look for in a Data scientist

Data Science is a way of making decisions and predictions through predictive causal analytics, as well as prescriptive analytics, and machine learning. A data scientist’s responsibilities include looking at exploratory data analysis, machine learning and advanced algorithms, and data product engineering.

DevSkiller’s Data Science interview questions can help you to whittle down the candidates who are the best critical thinkers. Data scientists need to possess the ability to objectively analyze the data presented to them before forming an opinion. The Data Science candidate you choose to recruit will need to show their proficiency in coding and be comfortable with a variety of programming tasks.

It will be preferable if your Data Science candidate is privy to various programming languages, but mainly Python and R. They will be analyzing data on a daily basis so they will need to demonstrate their proficiency in both mathematics and statistics.

Finally, if your candidate can demonstrate ability in machine learning, deep learning, or AI, then this will all work in their favor. Advances in these areas are happening rapidly so it will be advantageous if your Data scientist is up to date with advances in the industry, in order to remain ahead of the curve.

Build your own custom Data Science test

Some of our past clients have created their own interview questions, tailored to their business’s needs. Perhaps you would like to do the same?

Our range of Data Science coding tests can be altered to your needs. Opt for a test duration that suits you better, choose which questions are the most relevant, and even alter the difficulty level of each test.

Remote testing means you can conveniently assess candidates from all corners of the globe. Did we mention that you can even observe tests in real-time? That’s right, you can choose to observe how well each candidate is performing even while they are taking their test!

Still unsure about our Data Science interview questions?

If you’re still not completely convinced by our Data Science coding tests, check out what others are saying about us:

Patrycja Kiljańska - Specialist i talentindkøb hos Spartez

“We’ve replaced a high-maintenance in-house solution with DevSkiller. Our process looks the same, however, the product gives us better performance. The results are also way easier to assess.

Michael Gerwig - Teknisk chef hos Ada Health

"DevSkiller hjalp os med at spare kostbar tid på stedet for ansøgere, der allerede nu er sandsynlige at passe ind. Vi sparer 3 timer pr. kandidat - det var den tid, vi før brugte med ansøgere på en teknisk opgave."

Ofte stillede spørgsmål

Hvad er RealLifeTestingTM?

The RealLifeTestingTM methodology is behind all of DevSkiller’s Data Science interview questions and coding tests. We don’t use traditional game-like quizzes or algorithmic puzzles that don’t accurately assess how well a developer will actually perform in the role. Instead, we use RealLifeTestingTM to recreate a Data scientist’s everyday work environment and assess them using challenges that reflect those they usually encounter. RealLifeTestingTM provides us and our clients with a holistic view of each applicant’s entire skillset. When the challenges mirror real issues, then the responses reflect how well that candidate will cope.

Our Data Science interview questions expect candidates to possess the critical thinking needed to determine the best method for resolving problems they may encounter. Results are automatically generated and are assessed on the candidate’s decision-making and problem-solving skills.

How do candidates undertake Data Science interview questions?

One of the main advantages of DevSkiller testing is that our Data Science interview questions are easily accessible online. Recruiters can send test invites to their candidates and then the tests themselves can be taken from anywhere they choose. This is a great time-saver, as your Data Science candidates can send their tests back as soon as they’ve finished, no more waiting around for in-house tests to be completed.

Even better is that our tests are assessed automatically as well. Once the candidate has finished, our system gets to work on their answers and then produces an automated, non-technical report detailing how they performed. Meaning all the recruiter has to do is send out the invites and await the results.

Hvad synes kandidaterne om DevSkiller-testene?

The feedback we get from developer candidates is that they love how closely our tests resemble the real work they do. Developers often grow tired of developer testing involving algorithmic tests and tasks reciting coding patterns, as this method doesn’t allow them to really show off their skills. Once they realize our tests aren’t following the same pattern, they relish being given the chance to perform.

Our tests allow candidates to work on our state of the art in-browser IDE, or to use their own, and they can run unit tests, much like they would in their real work. Developers are awarded a chance to prove their actual software development skills and to use normal coding tools and conventions that reflect their work. It is refreshing for candidates to be able to prove their skills in a fair setting.