Databricks Coding Interview Questions

These are the 17 Databricks coding interview questions AceOffer has reconstructed from candidate reports, sorted by how often each was reported. KV Store QPS / Hit Counter (Map Operations) leads at 38×. Every question shows when it was last reported; the catalog refreshes monthly.

Part of the full catalog of Databricks interview questions, covering every round.

AceOffer is not affiliated with, endorsed by, or sponsored by Databricks. Questions are reconstructed from interview experiences candidates shared, not from Databricks materials.

Key facts

  • •17 distinct coding questions indexed
  • •251 candidate reports across those questions
  • •Most reported: KV Store QPS / Hit Counter (Map Operations) — 38× (last seen September 2026)
  • •Refreshed monthly · last updated October 2026

Which Databricks rounds ask coding questions?

Databricks draws coding questions from the rounds below. Counts are distinct questions, not times asked.

Usually two 45-60 minute rounds, implementation-style rather than LeetCode: CIDR firewall matching, a KV store that tracks its own QPS, the snapshot-set iterator, and a multi-threaded log writer with synchronous disk writes.13 questions

Most reported: KV Store QPS / Hit Counter (Map Operations) — 38×

One coding screen. The multi-mode commute shortest-path problem is one of the most reported, with a recorded trap: one BFS per transport mode is rejected in favour of a single pass.4 questions

Most reported: Optimal Commute / Shortest Path with Multiple Transport Modes — 30×

Which Databricks coding questions get asked most?

Sorted by candidate-report frequency. Click any question for the full breakdown.

QuestionRoundReportedLast seen
KV Store QPS / Hit Counter (Map Operations)Coding38×September 2026
IP CIDR Firewall Rules MatchingFreeCoding34×August 2026
Optimal Commute / Shortest Path with Multiple Transport ModesPhone Screen30×August 2026
Concurrent Log Writer (Durable Event / Data Writer)Coding22×August 2026
Run-Length Encoding (RLE) / Bit-PackingCoding18×August 2026
Tic-Tac-ToeCoding18×September 2026
Snapshot Set / Iterator DesignCoding17×July 2026
Fibonacci Tree / Path FindingCoding17×July 2026
Customer Revenue / Referral SystemCoding13×September 2026
Lazy ArrayCoding11×April 2026
Anagram Substring Search (Find All Anagrams / indexOf)Phone Screen9×August 2026
Delete / Edit IntervalCoding8×August 2026
Circuit Breaker ImplementationCoding5×August 2026
File System Encryption: Count Files, Then Minimize Encryption TimeCoding4×September 2026
Tetris / Falling Blocks SimulatorCoding3×June 2026
House Robber I / IIPhone Screen2×September 2025
Uniform Random Spanning Tree from Node GroupsPhone Screen2×May 2026

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FAQ

How many coding questions does Databricks ask?▾
AceOffer has reconstructed 17 distinct Databricks coding interview questions from 251 verified candidate reports, each with the follow-ups candidates reported and a last-reported date.
What is the most common Databricks coding interview question?▾
KV Store QPS / Hit Counter (Map Operations) — reported 38 times, last seen September 2026.
How fresh is AceOffer's Databricks coding question data?▾
The catalog is refreshed monthly from new candidate reports, and every question shows when it was last reported.

Get the full Databricks catalog

Every question, every candidate-reported follow-up, and what passers actually do. Monthly refresh.

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