Databricks Coding & Algorithms Interview Questions
Databricks Coding & Algorithms interview questions focus on clean, scalable problem solving under realistic constraints. Expect interviews that often resemble LeetCode-style algorithm problems but with an emphasis on optimizations that matter at scale: time and space complexity, edge cases, and clear, maintainable code. Interviews typically use an online IDE for live coding and are woven into a loop that also assesses system design and collaboration. For candidates targeting data, platform, or ML infrastructure teams, concurrency, streaming, and data-structure tradeoffs commonly surface alongside pure algorithmic challenges. For effective interview preparation, prioritize deliberate practice of medium-to-hard algorithm problems, timed mock interviews, and explaining complexity tradeoffs aloud. Solidify one primary programming language so you can write correct, testable code quickly, and revisit concurrency primitives and common distributed-systems patterns if your role touches platform work. Practice communicating assumptions, iterating from a brute-force approach to optimized solutions, and writing concise test cases. This combination of technical depth, clear communication, and systems awareness is what Databricks typically evaluates.

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"The search is what sold me. I typed in a really niche DP problem I got asked last year and it actually came up, full breakdown and everything. These guys are clearly updating it constantly."
Find the First Anagram Window in a String
Problem Given a lookup string and a nonempty query string, return the starting index of the first contiguous substring of the lookup string that is an...
Detect a K-in-a-Row Win on a Rectangular Board
Detect a K-in-a-Row Win on a Rectangular Board Implement winning_move(board, row, col, k) after a valid move has placed a player's nonzero integer tok...
Build a Constant-Time Snapshot Set Iterator
Build a Constant-Time Snapshot Set Iterator Design SnapshotSet, a set of integers whose iterators observe an immutable logical snapshot without copyin...
Implement Generalized Tic-Tac-Toe
Implement Generalized Tic-Tac-Toe Implement a TicTacToe class for two players on an m by n board with a configurable winning length k. `text TicTacToe...
Implement a Snapshot Set Iterator
Design and implement a set data structure that supports snapshot iteration. The set stores unique values. It must support the following operations: - ...
IPv4 CIDR Range Membership Queries
This question evaluates a candidate's ability to design an efficient longest-prefix-match lookup structure for IP address ranges, a core networking an...
Find the Earliest Anagram Window
Find the Earliest Anagram Window Problem Implement firstAnagramStart(text, pattern) -> index. Return the zero-based start index of the earliest contig...
Find a Path Between Nodes in a Fibonacci Tree
Practice a Databricks coding interview problem focused on find a path between nodes in a fibonacci tree. The prompt emphasizes edge cases, clean imple...
Implement a Snapshot Set Iterator
This question evaluates data structure design, versioning, and iterator consistency concepts within the Coding & Algorithms domain, focusing on implem...
Design an n x n Tic-Tac-Toe Game
This question evaluates a candidate's ability to design a class-based data structure that tracks game state and efficiently detects a win condition af...
Determine allow/deny for an IP via CIDR rules
This question evaluates understanding of IPv4 addressing, CIDR range matching, rule ordering and precedence, and algorithmic correctness in determinin...
Optimal Commute: Nearest Transit Distance in a City Grid
This question evaluates a candidate's ability to apply multi-source breadth-first search to a grid-based shortest-path problem. It tests graph travers...
Find path in implicit Fibonacci tree
You are given a special family of binary trees called Fibonacci trees. The k‑th order Fibonacci tree T(k) is defined recursively: - T(1) is a single n...
Implement streaming RLE and bit-packed codec
You are implementing a simple compression scheme for sequences of 32‑bit signed integers. The codec should support two encoding strategies: 1. Run‑Len...
Choose the Best Travel Mode
Solve a grid-based pathfinding problem where a traveler must choose the transportation mode with the lowest travel time and cost tie-breakers. The que...
Design IP/CIDR rule matcher
Design and implement a rule matcher that returns 'accept' or 'deny' for a given IPv4 address based on a set of rules. Each rule can be either an inclu...
Implement run-length encoding and decoding
You are given a string consisting of lowercase English letters. You need to implement run-length encoding (RLE) and its corresponding decoding. 1. Enc...
Implement a snapshotable set with iterators
Implement a SnapshotSet data structure with the following API: add(x), remove(x), contains(x), snapshot() -> sid, and iterate(sid) -> iterator over th...
Design Tic-Tac-Toe and QPS data structures
You are given two independent coding problems that focus on data structure and API design. --- Problem 1: Generalized Tic-Tac-Toe Game with Simple AI ...
Solve Grid Path and Graph Sampling
This question evaluates graph algorithms and probabilistic/combinatorial reasoning, covering multi-criteria shortest-path optimization (minimizing tra...