Top 50 real-time data Interview Questions
The most frequently asked real-time data questions across all roles and companies, ranked by real interview frequency. Updated daily.
Use a sliding window and deque to find the densest burst of Splunk error events in a realtime stream.
SplunkMaintain moving mean and tie-broken mode for AKUNA Capital price data using a deque, frequency map, and lazy max heap.
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Design a fault-tolerant real-time ingestion and ML processing system with low latency, scalable state, and reliable downstream outputs.
SnowflakeAssesses your approach to streaming data, scheduling, and UI responsiveness.
Balyasny Asset ManagementTests your ability to design robust real-time ingestion pipelines under legacy constraints.
Closer ConsultingDesign a secure, observable pipeline for ingesting and processing real-time clinical data at Jaan Health/Phamily.
Design an approach for feeding streaming events into an agent loop with low latency, state management, and operational visibility.
InfosysUse ranking to return the nth distinct salary from an employee table.
AkamaiRank Balyasny research models by average return within each asset class using DENSE_RANK and aggregation.
Balyasny Asset ManagementUse RANK() and grouped revenue to find ServiceTitan's top three service categories in each region.
ServiceTitanDesign layered access controls for services processing millions of real-time data points, with workload identity, least privilege, encryption, and detec...
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