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Data Engineer Interview Questions

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Data Engineer Interview Questions

Le data engineer est un professionnel de l’informatique présent dans presque tous les secteurs. Il/Elle suit l’évolution et les tendances des données pour orienter les stratégies futures de l’entreprise. Une part essentielle de son travail consiste à transformer des données brutes en données exploitables en créant des pipelines et des systèmes de données.

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

Question 1

Question 1 : Décrivez en détail votre niveau d’expertise en langage de programmation.

How to answer
Comment répondre : Avant l’entretien, révisez votre CV et dressez la liste des programmes que vous maîtrisez. Si vous vous apercevez que vous ne connaissez pas un logiciel que l’entreprise utilise majoritairement, mettez en avant votre motivation et votre volonté de vous former au logiciel en question.
Question 2

Question 2 : Expliquez selon vous en quoi consiste le data engineering.

How to answer
Comment répondre : Soulignez votre rôle au sein de l’entreprise et par rapport à d’autres fonctions telles que data scientist pour définir clairement votre contribution. Précisez la différence entre un ingénieur axé sur les bases de données et un ingénieur axé sur les pipelines de données.
Question 3

Question 3 : Quelle est votre expérience en gestion de données dans le cloud et avec Apache Hadoop ?

How to answer
Comment répondre : Renseignez-vous sur les logiciels de gestion de données dans le cloud utilisés par l’entreprise (notamment Apache Hadoop). Un data engineer doit maîtriser les langages de programmation et les systèmes de gestion des données couramment employés dans le secteur, dont Apache Hadoop.

20,192 data engineer interview questions shared by candidates

You are given an integer list coins representing coins of different denominations and an integer amount representing a total amount of money. Return the fewest number of coins that you need to make up that amount. If that amount of money cannot be made up by any combination of the coins, return {}. You may assume that you have an infinite number of each kind of coin. Example 1: Input: coins = [1, 5, 6, 9, 15], amount = 31 Output: {15:2, 1:1} Example 2: Input: coins = [1, 5, 6, 9, 15], amount = 100 Output: {15:6, 9:1, 1:1}
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Data Engineer

Interviewed at Brave AI Lab

4.7★
Mar 24, 2023

You are given an integer list coins representing coins of different denominations and an integer amount representing a total amount of money. Return the fewest number of coins that you need to make up that amount. If that amount of money cannot be made up by any combination of the coins, return {}. You may assume that you have an infinite number of each kind of coin. Example 1: Input: coins = [1, 5, 6, 9, 15], amount = 31 Output: {15:2, 1:1} Example 2: Input: coins = [1, 5, 6, 9, 15], amount = 100 Output: {15:6, 9:1, 1:1}

1. Imagine a table keeping track of all the rides a driver undertakes in a given day. How do you query that table to find out the time when he did not have any rides. So the table may have a record when he picks up his first ride and then he picks another and then drops both of them. After a while he picks up a few more which again is recorded in the table. So with all that how do you find the data when he does not have any rides
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Senior Data Engineer

Interviewed at Lyft

3.8★
Feb 18, 2019

1. Imagine a table keeping track of all the rides a driver undertakes in a given day. How do you query that table to find out the time when he did not have any rides. So the table may have a record when he picks up his first ride and then he picks another and then drops both of them. After a while he picks up a few more which again is recorded in the table. So with all that how do you find the data when he does not have any rides

SQL Coding: 5 questions 4 tables were given and questions were mostly on joins, aggregate functions, sub queries. Python Coding: I guess there were total 5 questions but could reach only till second question. Count the number of words in a sentence. Count the frequency of words from the list and store the results in a hash map.
avatar

Data Engineer

Interviewed at Meta

3.6★
Feb 4, 2017

SQL Coding: 5 questions 4 tables were given and questions were mostly on joins, aggregate functions, sub queries. Python Coding: I guess there were total 5 questions but could reach only till second question. Count the number of words in a sentence. Count the frequency of words from the list and store the results in a hash map.

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