Don't focus only on Leetcode SQL questions. Their questions are more higher level. Prepare for advanced ETL questions. You should write the best solution immediately instead of just writing the solution down.
Data Engineer Interview Questions
Data Engineer Interview Questions
Data engineers zijn IT-professionals en zijn in bijna elke bedrijfstak nodig. Data engineers volgen gegevenstrends voor het vaststellen van de beste vervolgstappen voor bedrijven. Een cruciaal onderdeel van het werk van een data engineer bestaat uit het verwerken van ruwe gegevens tot bruikbare gegevens door datapipelines te creëren en gegevenssystemen te bouwen.
Meest gestelde sollicitatievragen voor een data engineer (M/V/X) en hoe te antwoorden
Vraag 1: Kunt u tot in detail uw kennisniveau van programmeertalen omschrijven?
Vraag 2: Leg in uw eigen woorden uit wat data engineering inhoudt.
Vraag 3: Kunt u uw ervaring met Apache Hadoop en databeheer in een cloudomgeving beschrijven?
20,957 data engineer interview questions shared by candidates
Show gender, min birthday and max birthdate where a customer bought at least one product
Dot Product with Sparse Vectors, Dot product of sparse vectors stored as hashmaps
How would you design and build a data model to report on active users and number of posts by interface (ipad, iphone, desktop web, etc) given a hierarchy of these interfaces and their rollup groupings, at any and all levels of the hierarchy?
Phone: SQL qs are pretty basic on equi joins, outer joins, and self joins. Coding exercises are pretty basic like word search, etc. Time is a crunch (1hr). You have to keep explaining while coding so that the interviewer online understands your thought process. In Person: Some live coding exercise, tougher than phone qs, product sense, visualization.
Design a relational database for a ride-sharing app.
(After being shown a graph with some data) Can you think of reasons why the data would appear this way?
Easy/medium SQL and coding
Add up a sum of numbers on a whiteboard and give me the average.
Didn't pass the tech screening. 60 min of SQL and Python (30 min and 3 tasks each). SQL is intermediate with given schema, Python rather foundational data structures and algorithms.
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