Null +1 = ? Union and Union Alll which one is faster
Data Engineer Interview Questions
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 : Décrivez en détail votre niveau d’expertise en langage de programmation.
Question 2 : Expliquez selon vous en quoi consiste le data engineering.
Question 3 : Quelle est votre expérience en gestion de données dans le cloud et avec Apache Hadoop ?
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Already covered in other reviews
SQL - I was given 4 tables Sales, Product, Promotion and something else (Never had to use it). 1. Which product had the highest sales with promotions and sales ( basically a where clause on 2 flags) 2. What % of sales happened on the first and last day of promotion. I don't remember the rest.. I'd say your ability to translate regular english statements into SQL is tested very well
basic sql and python problem
You have this table - orders (order_id, customer_id, order_datetime, order_amt): 1)select top 10 paying customers for given month
Tell me about your self? What is Data Warehousing?
The interview was highly focused SQL questions such as finding the third high, finding the newest one.
Based on my experience in different projects and analytical functions in SQL
queries, R,Python, data warehouses
Mostly technical / coding questions with limited time to answer, talk about past projects (with techncial depth), almost no questions with respect to data science (statistics, ml, math, modeling ...)
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