Role
Data Engineer
Real interview questions with expert answers, plain-English explanations, and practical examples. (26 questions)
Microsoft
Data Engineer
Data Structures & Algorithms
A Microsoft data engineer needs to count unique users from a high-volume, real-time event stream. How would you choose and implement appropriate data structures for efficient, approximate cardinality estimation?
Deloitte
Data Engineer
Performance Optimization
A critical Deloitte data pipeline is failing to meet its SLAs due to performance bottlenecks. As a Data Engineer, how would you approach diagnosing and optimizing its end-to-end performance, from ingestion to consumption?
Microsoft
Data Engineer
Machine Learning
How would a Microsoft Data Engineer ensure data quality for machine learning models, and what strategies are crucial for preventing data drift?
Airbnb
Data Engineer
Data Structures & Algorithms
How would an Airbnb Data Engineer select optimal data structures to process and query large-scale, real-time event data efficiently?
VMware
Data Engineer
Caching
A VMware data pipeline processes massive datasets, requiring efficient access to frequently computed intermediate results. How would a data engineer design and implement a caching strategy to significantly improve performance and reduce reprocessing overhead?
Swiggy
Data Engineer
Security
A Swiggy data engineer is tasked with securing a new pipeline handling sensitive user data. How would you implement robust encryption, access control, and data masking strategies to ensure data integrity and compliance?
Uber
Data Engineer
Message Queues
As an Uber data engineer, how would you leverage message queues to build a scalable and fault-tolerant real-time data ingestion pipeline?
HCL
Data Engineer
Message Queues
A critical HCL data pipeline relies on message queues for asynchronous processing. How do message queues ensure data durability and order preservation, and what mechanisms are involved?
Intuit
Data Engineer
Performance Optimization
A large-scale batch data processing job is consistently missing its SLA. How would a data engineer diagnose and optimize its end-to-end performance?
Zomato
Data Engineer
Performance Optimization