System Design · Kafka · Spark · SQL · AI/ML — topic-wise question banks with detailed answers, grilling sessions, and design walkthroughs.
Design a real-time pipeline, analytics platform, event-driven system — with diagrams
Internals, partitions, consumer groups, exactly-once semantics, performance tuning
RDD vs DataFrame, catalyst optimizer, shuffle, partitioning, streaming
Window functions, CTEs, self-joins, optimization — most asked patterns
LLM concepts, RAG, ML system design, model evaluation, AI trade-offs
Streaming concepts, state management, watermarks, windowing strategies
Data structures, OOP, generators, async, common coding patterns
STAR method, ownership, conflict, delivery — leadership principles answered