Data Engineer Interview Preparation
Data engineering interview preparation with focus on data pipelines, ETL, and big data technologies.
Key Skills & Technologies
Data Pipelines
ETL/ELT
Big Data Technologies
Data Warehousing
Stream Processing
SQL
Interview Focus Areas
Data pipeline design and implementation
ETL/ELT processes and optimization
Big data technologies (Spark, Hadoop)
Data warehousing and modeling
Stream processing and real-time data
Data quality and monitoring
Top Hiring Companies
Top Data Engineer Coding Questions
Practice these 20 most relevant coding problems for data engineer interviews.
#1
Recommended
#3594MediumFrequency: 100%
Identify the Largest Outlier in an Array
ArrayHash TableCountingEnumeration
#2
Recommended
#3655MediumFrequency: 100%
Digit Operations to Make Two Integers Equal
GraphMathHeap (Priority Queue)Number TheoryShortest Path
#3
Recommended
#3638HardFrequency: 100%
Minimum Operations to Make Character Frequencies Equal
Hash TableStringDynamic ProgrammingCountingEnumeration
#4
Recommended
#3613MediumFrequency: 100%
Maximize Amount After Two Days of Conversions
ArrayGraphStringDepth-First SearchBreadth-First Search
#5
Recommended
#716HardFrequency: 100%
Max Stack
DesignLinked ListStackDoubly-Linked ListOrdered Set
#6
Recommended
#7
Recommended
#8
Recommended
#532MediumFrequency: 100%
K-diff Pairs in an Array
ArrayHash TableSortingTwo PointersBinary Search
#9
Recommended
#1423MediumFrequency: 100%
Maximum Number of Occurrences of a Substring
Hash TableStringSliding Window
#10
Recommended
#11
Recommended
#1171MediumFrequency: 100%
Shortest Path in Binary Matrix
ArrayBreadth-First SearchMatrix
#12
Recommended
#13
Recommended
#295HardFrequency: 100%
Find Median from Data Stream
DesignSortingTwo PointersHeap (Priority Queue)Data Stream
#14
Recommended
#362MediumFrequency: 100%
Design Hit Counter
ArrayDesignBinary SearchQueueData Stream
#15
Recommended
#314MediumFrequency: 97%
Binary Tree Vertical Order Traversal
Hash TableSortingTreeDepth-First SearchBreadth-First SearchBinary Tree
#16
Recommended
#658MediumFrequency: 96%
Find K Closest Elements
ArraySortingTwo PointersBinary SearchSliding WindowHeap (Priority Queue)
#17
Recommended
#18
Recommended
#19
Recommended
#20
Recommended
All Interview Questions
Browse questions by company and difficulty level
Topics & Algorithms
Practice by specific algorithm and data structure topics
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