Databricks Coding Interview Questions
27 Databricks coding interview problems with full optimal solutions — 18 easy, 7 medium, 2 hard. Every problem ships with multiple approaches (brute-force first, then the optimal), complexity tables for each, company-specific tips on what an Databricks interviewer values, and a FAQ section.
Showing 2 problems of 27
- #26hardfoundational
26. Sliding Window Maximum
Return the maximum in every sliding window of size k — a deque-based streaming aggregation Databricks implements in Structured Streaming's watermark-bounded window queries over high-throughput event streams.
- #27hardfoundational
27. Serialize and Deserialize Binary Tree
Encode and reconstruct an arbitrary binary tree through a string — a serialization-format problem Databricks faces when checkpointing execution-plan trees in Delta's query optimizer and persisting MLflow model dependency graphs.
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