Role
Data Engineer
Real interview questions with expert answers, plain-English explanations, and practical examples. (20 questions)
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
Explain data skew in large-scale data processing, and how would a data engineer identify and mitigate it for optimal performance?
Tech Mahindra
Data Engineer
Data Structures & Algorithms
How would you choose the optimal data structure for real-time analytics on a high-velocity data stream?
Mphasis
Data Engineer
Security
How do you ensure the security and compliance of sensitive data within a modern data pipeline?
Uber
Data Engineer
Data Structures & Algorithms
When would you use a Merkle Tree in a data pipeline, and what benefits does it provide for data integrity?
Deloitte
Data Engineer
Data Structures & Algorithms
Explain the HyperLogLog algorithm, and how would a data engineer use it to estimate unique counts for massive datasets?
Cognizant
Data Engineer
Data Structures & Algorithms
Explain the differences between Bloom filters and Count-Min sketches, and when would a data engineer use each for approximate analytics?
ServiceNow
Data Engineer
Performance Optimization