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Data Engineer Interview Questions
Behavioral
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Title
Topic
Companies
Level
Merge Sorted Lists
Data Structures & Algorithms
Locked
Easy
String Shift
Data Structures & Algorithms
Locked
Easy
Prime to N
Data Structures & Algorithms
Locked
Medium
Find the Missing Number
Data Structures & Algorithms
Locked
Easy
Alphabet Sum
Data Structures & Algorithms
Locked
Easy
Recurring Character
Data Structures & Algorithms
Locked
Easy
Rectangle Overlap
Data Structures & Algorithms
Locked
Easy
Find Bigrams
Data Structures & Algorithms
Locked
Easy
Permutation Palindrome
Data Structures & Algorithms
Locked
Medium
One Element Removed
Data Structures & Algorithms
Locked
Medium
RMS Error
Machine Learning
Locked
Easy
Fill None Values
Data Structures & Algorithms
Locked
Easy
Good Grades and Favorite Colors
Data Structures & Algorithms
Locked
Easy
The Brackets Problem
Data Structures & Algorithms
Locked
Easy
Over 100 Dollars
Data Structures & Algorithms
Locked
Easy
Level Of Rain Water In 2D Terrain
Data Structures & Algorithms
Locked
Medium
Minimum Change
Data Structures & Algorithms
Locked
Easy
Append Frequency
Data Structures & Algorithms
Locked
Medium
Weekly Aggregation
Data Structures & Algorithms
Locked
Medium
Scrambled Tickets
Data Structures & Algorithms
Locked
Hard
1
2
3
...
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Top K Algorithm
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Weighted Sampling Techniq…
PyTorch
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AWS Glue Data Catalog
Great Expectations
OpenLineage
Informatica MDM
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ETL/ELT Pipeline Design
Directed Acyclic Graph (D…
Bayesian Structural Time …
Synthetic Control Method
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Data Preparation
Randomized Experiments
Cost Per Acquisition (CPA…
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MapReduce
GPS Technology
KPI Management
Impact Modeling
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Research Methodology
Business Analysis Methodo…
Critical Thinking
Coding Standards
Technical Debt Management
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Acceptance Criteria
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STAR Interview Technique
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Citus
Harmonic Series
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Google Docs
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STAR Method
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Lucene
Synonyms
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Amazon ElastiCache
Lambda Architecture
TensorFlow Extended
Face Recognition
Triple Loss Networks
Two-Phase Commit Protocol
High Concurrency Handling
Bandwidth Management
IT Infrastructure
Traffic Shaping
PySpark
Apache Spark
Queueing Theory
Internationalization in S…
Retry Logic
asyncio
Finite State Transducer
Attribute-Based Access Co…
Database Concurrency Cont…
Role-Based Access Control…
Message Brokering
Change Data Capture
Conflict Resolution
Debezium
Schema Mapping
Idempotent Processing
Database Transaction Isol…
Backend Development
Byzantine Fault Tolerance
Dependency Analysis
Error Handling Techniques
Abstract Factory Pattern
Composite Design Pattern
Observer Design Pattern
Cisco Meraki
DHCP
Network Address Translati…
VLAN Configuration
Customer Segmentation
HBase Database
Data Completeness
Data Loading Techniques
Database Schema Migration
Upsert Operations
Location-Based Services
Machine Learning Integrat…
Dimensional Modeling
Snowflake Schema
JSON Query
Data Persistence
Alert Routing
Severity Assessment
Streaming Analytics
AWS Athena
Azure Storage
Presto SQL
Data Parsing
Cloud Data Integration
Reliability in Technology
Video Streaming Platform
Paramiko
SFTP
Amundsen
AWS Glue Schema Registry
Prefect
OpenSearch
Audio Transcription
Binary Data Processing
Image Recognition
Scene Understanding in Co…
Data Durability
Metabase
Time-Series Computations
Dagster
Feast
Software Debugging
IT Infrastructure Monitor…
Data Backfilling
Data Compression
Data Enrichment
Disaster Recovery
Validation Testing
Event Schema Management
Event Governance
Notification System Desig…
InfluxDB
TimescaleDB
Circuit Breaking
Failover Handling
Elastic Scaling
Apache Pulsar
Multi-Tenant Isolation
Equality Comparison Techn…
Search Operations
collections
Brute Force Algorithm
Character Encoding
Iterable
Floyd's Cycle Detection A…
Binary Tree Traversal
Quicksort Algorithm
K-way Merge Algorithm
Exponentiation Algorithms
Bitwise XOR
Euclidean Algorithm
Greatest Common Divisor (…
Pandas Data Manipulation
Data Interpolation and Ex…
Palindrome
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Matrix Manipulation
Big O Notation
2D Grid Algorithms
Bitwise Operations
Data Frames
Priority Queue Data Struc…
Variable Assignment
Python Memory Management
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Permutation
Function Declaration and …
Code Review
Continuous Integration
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Plugin Architecture
Semantic Versioning
Type Hinting in Python
black
flake8
Pydantic
Runtime Validation
Python Special Methods
Amortized Analysis
Stratified Sampling Techn…
Term Frequency
Duplicate Detection
Prime Number Theory
Binary Search Trees
json
JSON
Merge Sorted Lists
Factorial
Trailing Zeroes in Factor…
HashMap Data Structure
Python Dictionary
heapq
Heap Data Structure Opera…
Matrix Multiplication Alg…
Vector Mathematics
Trie Data Structure
Reservoir Sampling
Stock Trading Algorithms
Word2Vec
seaborn
TF-IDF
Frequency Distribution An…
Tableau
Data Filters
Field Parameters
Code Maintainability
Code Readability
Adapter Design Pattern
Object-Oriented Design
E-commerce
Method Overriding
API Error Handling
Software Testing
GPU Acceleration
Property-Based Testing
Hypothesis
React.js
Zustand
Microsoft Azure
Azure Kubernetes Service
Azure Key Vault
Velero
Azure Active Directory (A…
HashiCorp Vault
Istio Service Mesh
Chaos Engineering
Secret Management
Linkerd
GitOps
Feature Flags
Feasibility Study
SARIMA Model
ARMA Model
Sensor Data Fusion
Kalman Filter
Prophet Forecasting Tool
SARIMA Model
Autocorrelation
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Reorder Point Determinati…
Rolling Forecast
dynamic-pricing
feature-engineering
Reinforcement Learning
CodeBuild
EventBridge
Vowpal Wabbit
SageMaker Data Quality Ch…
SageMaker Training Jobs
Incremental Learning
Real-time Feedback System…
Adaptive Algorithms
Alert Calibration
Compliance and Audit
Rollback Strategy
Support Vector Machine
Cost-sensitive Learning
Reweighting
Custom Loss Function Desi…
Security
Multi-class Logistic Regr…
Probability Threshold Sel…
Synthetic Data Generation
Data Resampling Technique…
SMOTE Algorithm
Bag of Words Model
Computer Vision
TF-IDF
Data Labeling
Noisy Data Handling
Marketplace
Community Detection Algor…
Target Encoding
Probability Estimation
Discriminant Analysis
Regression Analysis
Lexical Search
Error Analysis and Detect…
Concept Drift Detection
Annotation Workflow
Model Ensembles
Pipeline Auditing
Data Labeling and Ground …
Automated Retraining
Threshold Calibration
Naive Bayes Classifier
Gradient Descent
Inception Architecture
HR Tech / Career
Cold Start Problem in Mac…
Vectorization Techniques
Cosine Similarity
Feedforward Neural Networ…
Euclidean Distance
Distance Metrics
Matrix Transpose
Train Test Split
Gradient Descent Optimiza…
Newton's Method
T5
Co-Reference Resolution
Named Entity Recognition
Graph Neural Networks
Stacking
Machine Learning Training…
Pre-Pruning
Algorithm Convergence
Stopping Criterion
Information Entropy
Gini Impurity
Partial Dependence Plots
Text Similarity
Activation Function
Gradient Boosting
Random Forest Algorithm
XGBoost Algorithm
Numerical Feature Scaling
Softmax Function
Multinomial Regression
Error Metrics (MAE, RMSE,…
Model Drift Management
Kernel Trick
Hidden Markov Model
Latent Variable Models
Bayesian Updating
User Profiling
Prefix Search Algorithms
Gaussian Mixture Model
Heuristic Development
Logistic Regression
Monitoring and Quality Co…
Machine Learning
Information Gain in Machi…
Lasso Regression
Ridge Regression
Performance Evaluation
False Positive
Risk Management
Data Distribution Shift
Model Deployment
Real-time Processing
Key Performance Indicator…
Cross Selling
Audience Analysis
Difference-in-Differences…
Snapchat
Twitch
Community Engagement
Influencer Marketing
Experiential Marketing
Viral Marketing
Augmented Reality
Google Ads
Professional Services / C…
Microsoft Dynamics CRM
LinkedIn Marketing
Lead Generation
Logstash
Autoencoder
Explainable Artificial In…
Log Parsing
Sequence to Sequence Mode…
logBERT
Tenant Isolation
KEDA
Drain
Spell
Concept Drift Handling
Privacy Preservation
Baseline Benchmarking
Resource Profiling
Backpressure Handling
Burst Handling
One-Class SVM
Alert Grouping
Uplift Modeling
Continuous Evaluation
AWS CodePipeline
AWS Fargate
Monitoring and Observabil…
AWS SNS
Domain Adaptation
Rollback Strategies
Regression Metrics
Median Absolute Error
Docker Containerization
FastAPI Framework
Experiment Tracking Softw…
Kubeflow Pipelines
Metaflow
Kubeflow Metadata
ONNX
TorchScript
TensorFlow Serving
TorchServe
Distributed Training
RBAC
Early Stopping
Model Packaging
CI/CD Automation
API Gateway
Optical Character Recogni…
Orchestration
Random Walk
Geometric Progression
Normal Distribution Appro…
Biomedical / Biotech
Inclusion-Exclusion Princ…
Stirling Numbers
Joint Probability
Bidding Strategies
Sequential Decision Makin…
Law of Iterated Expectati…
Triangle Inequality Theor…
Probability Density Funct…
Stochastic Processes
Combinatorial Analysis
Feedback Management
Event Tracking
Error Log Analysis
Feature Optimization
Comscore
Nielsen
SimilarWeb
Session Analysis
Customer Lifetime Value (…
Advanced Search Technique…
Twitter API
Customer Lifetime Value (…
Sales Trends Analysis
User Interaction Tracking
Retention
User Acquisition
Virality Modeling
Guardrail Metrics
Application Deployment
Feature Analysis
Business Rule Analysis
Case Study Analysis
Product Validation
Customer Acquisition
Referral Marketing
Partnership Evaluation
Market Entry Strategies
Product Positioning
Pagination
Apache Solr
Full Text Search
Engagement Analytics
Product Management
Google Maps
WhatsApp
Memcached
Cache Invalidation Techni…
Query Normalization
Data Replication
Data Migration Strategy
Query Tracking
Optimization Techniques
Data Skew
Content Access Control
Diagnostic Testing
Digital Forensics
Threat Intelligence
Red Teaming
Cybersecurity Monitoring
Security Automation
Cybersecurity Threat Dete…
Firewall Technology
Bitbucket
Code Validation Technique…
DevOps
Webhooks
AST-based Pattern Matchin…
AWS Glacier
TLS Security
Penetration Testing
Real-Time Messaging
Signal Protocol
Artificial Intelligence
Evaluation Criteria
Ethical AI
Inference in Machine Lear…
Tradeoff Analysis
Recall Bias
Content Moderation
AI Model Development
Data Privacy
Transformer Model in Mach…
Bias Detection and Mitiga…
Pivot Table
Date Range Filtering
Running Total
Count Function
DISTINCT modifier
SQL Aggregate Functions
ALTER TABLE
Concatenate Function
SQL Update Command
UNION ALL
Session Management
Gaps and Islands Problem …
Median Calculation
Quarter-over-Quarter Anal…
SELECT statement
DATEDIFF function
YEAR function
SQL Cross Join
RANK() function
LEAST function
Type Casting
MIS Reporting
Tie-breaking Algorithms
Order Picking
Column Selection
Date Extraction
Employee Retention Analys…
Simpson's Paradox
t-statistic
Mean
Statistical Bias
Data Binning
Loss Functions
Gaussian Distribution
Least Squares Method
Functions in Programming
Two-sample Proportion Tes…
Data Simulation
F-test in Statistics
Multiple Comparisons in S…
Interquartile Range (IQR)
Maximum A Posteriori Esti…
Monotonic Functions
Component Analysis
Central Limit Theorem
Margin of Error
Truncated Distribution
Percentage Point Function…
R-squared
Variable Transformation
Parametric Modeling
Z Test
Mathematical Reasoning
Credit Risk Monitoring
Amortization
Tariff Engineering
Dynamic Modeling
DMAIC Methodology
Internet of Things (IoT)
Warehouse Management Syst…
Fishbone Diagram Analysis
Statistical Monitoring
Telemetry
Branch and Bound Algorith…
Time Value of Money
Working Capital Managemen…
Credit Risk Mitigation
Total Cost of Ownership
BATNA
Supplier Relationship Man…
Principled Negotiation
ZOPA
Design-to-Value
Business Continuity and R…
Scalability Planning
Real-Time Tracking
Sensitivity Testing
Scheduling Optimization
Performance Bottlenecks
Cross Training
Cycle Time Analysis
Mixed Integer Programming
Workforce Management
Skill Matrix Development
Optimization Problem Form…
Real-Time Scoring
Hardware
Data Mart
Consumer
Decision Making
GraphQL
Server-Sent Events
Search Engine Technology
Socket Programming
ArgoCD Continuous Deliver…
Drools Business Rules Man…
Pact.io
Circuit Breaker Pattern
Jaeger Tracing
Spring Cloud Contract
Open Policy Agent
Consumer-driven Contract …
Backend API Design
Top Companies
Amazon
Meta
Google
Lyft
Uber
Microsoft
The Home Depot
Tata Consultancy Services
Linkedin
Ibm
Apple
Deloitte
Jpmorgan Chase & Co.
Accenture
Paypal
Doordash
Walmart
Instacart
Capital One
Degreed
Tiktok
Roblox
Nvidia
C3 Ai
Exl
Tokopedia
Shopify
Cognizant
Tripadvisor
Visa
Epic
Typeform
Mckinsey & Company
Bloomberg Lp
Netflix
Expedia, Inc.
Ebay
Aarp
Cvs Health
American Express
Stripe
Noodle.Ai
Pinterest
Factset
Palantir technologies
Honeywell
Spotify
Robinhood
Zillow
Intel Corporation
Tiger Analytics
Chewy
Samsung Electronics
Rakuten
Wayfair
Yelp
State Farm
Flipkart
Ey
Quora
Citadel Llc
Booking.Com
Indeed.Com
Sanofi
Gap Inc.
Quantumblack
Siemens
Citi
Snap Inc.
Cisco
Barclays
Pwc
Databricks
Twitter
Bmo Harris Bank
Cerner Corporation
Infosys
Nextdoor
Humana
Ubs
Goldman Sachs
Adobe
Morgan Stanley
Sap
Snowflake
Klaviyo
Revolut
Bayer
Asana
Thumbtack
Kpmg
Booz Allen Hamilton
Adp
Upstart
Oracle
Shopee
Two Sigma
Qualtrics
The Boston Consulting Gro…
Sabre
Qualcomm
Pvh Corp.
Fractal Analytics
Southern Company
Square
Pocket gems
Lumen Technologies
Jane Street
Tesla
Airbnb
Hubspot
Salesforce
Affine Analytics
Target
Capgemini
Verizon
Quantiphi, Inc.
Tredence
Discover
Grainger
Glassdoor
Dropbox
Gro Intelligence
Xcel Energy
Medidata Solutions
Groupon
Rbc
Ericsson
Wipro
Swiggy
Netapp
Northwestern Mutual
Abbott
Apptio
Point72
Akamai
Vmware
Cgi
Digitalocean
Worldquant Llc
Optiver
Walgreens
Cvs Pharmacy
Esri
Wolters Kluwer
The Children'S Hospital O…
Ford Motor Company
Mastercard
Okcupid
Veeva Systems
Plymouth Rock Assurance
Allstate
Bank Of China
Uc Berkeley
Procter & Gamble
Csaa Insurance Group, A A…
Zenefits
The Voleon Group
Catalina Marketing
Epsilon
Coupang
Agoda
Mu Sigma Inc.
Huawei Technologies
Thomson Reuters
Datadog
Quicken Loans
Transunion
Bytedance Inc.
Nestlé
Kroger
Ticketmaster
Grant street group
Credit Suisse
Morningstar
Intuit
Societe Generale Global S…
Insud pharma
Verisk Analytics
Epifi
Grubhub
Abc
Drw
OpenAI
Bnp Paribas
Ge Aviation
Akuna Capital
Reddit, Inc.
Tradeweb
Disney Streaming Services
Criteo
Natera
Datarobot
Drivetime
Atos
Hulu
Anheuser-Busch Inbev
Etsy
Farmers Insurance
Nokia
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