Databricks Software Engineer Interview Questions
Databricks Software Engineer interview questions focus on algorithmic coding and deeper systems problems that reflect real-world, data-intensive challenges. What’s distinctive about Databricks is the strong emphasis on distributed-systems thinking and performance: interviewers often probe Spark/Delta Lake concepts, cluster/resource tradeoffs, concurrency, and practical optimization rather than purely theoretical puzzles. Candidates are typically evaluated on problem-solving, code clarity and correctness, systems design for scale, debugging and performance reasoning, and communication skills that show how they collaborate across product and data teams. Effective interview preparation balances algorithm practice with hands-on distributed-systems experience. Expect a multi-stage process that usually begins with a recruiter screen and a timed coding assessment or technical phone screen, followed by deeper coding rounds, a system-design/architecture interview tailored to data platforms, and behavioral or hiring-manager conversations. Most interviews are virtual and use online IDEs. To prepare, do timed coding mocks, study distributed-systems fundamentals and Spark internals, build and optimize small ETL/Spark jobs, and craft concise STAR stories showing ownership and impact. During interviews, explain tradeoffs, write clear testable code, ask clarifying questions, and avoid undocumented assumptions.

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Evaluate ACL rules for IP and CIDR
This question evaluates a candidate's competency in IP address and CIDR arithmetic, bitwise reasoning, and algorithm design within the Coding & Algori...
Find path between nodes in Fibonacci tree
This question evaluates understanding of recursive tree structures, preorder indexing, implicit tree representations, algorithmic reasoning about node...
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...
Find all anagram start indices
This question evaluates proficiency in string manipulation, algorithmic efficiency, and pattern detection through character frequency analysis, assess...
Implement a Tic-Tac-Toe game API
This question evaluates implementation skills in data structures and algorithmic optimization, focusing on efficient state tracking and constant-time ...
Convert an IP range to minimal CIDRs
This question evaluates understanding of IPv4 address encoding, binary and bitwise operations, and optimal interval covering for expressing consecutiv...
Implement lazy array and KV store
This question evaluates understanding of lazy evaluation and functional transformation chaining for a LazyArray alongside in-memory data structure des...
Design an IP filter using CIDR rules
Explain CIDR notation with a couple of concrete examples. Show how to convert a prefix like 192.168.0.0/16 into an inclusive 32-bit integer range and ...
Implement a sliding-window hit counter
Implement a hit counter that supports recordHit(timestamp) and getHits(pastSeconds). Use a fixed-size array to maintain a sliding time window (e.g., l...
Design BFS to detect forced win in Tic-Tac-Toe
You are given an n×n Tic-Tac-Toe–like board and a target k (1 ≤ k ≤ n). From the current board state and the player to move, design an algorithm to de...
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...
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...
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...
Implement a Snapshot Set Iterator
This question evaluates data structure design, versioning, and iterator consistency concepts within the Coding & Algorithms domain, focusing on implem...
Find the Best Commute Mode
This question evaluates competency in grid-based pathfinding, graph traversal, and multi-criteria optimization of path time and cost within the Coding...
Find Fastest Commute Mode
This question evaluates graph traversal and shortest-path reasoning on a constrained 2D grid, including modeling movement rules per transportation mod...
Solve Grid Path and Graph Sampling
This question evaluates graph algorithms and probabilistic/combinatorial reasoning, covering multi-criteria shortest-path optimization (minimizing tra...
Find Path Between Fibonacci Tree Nodes
This question evaluates a candidate's ability to reason about recursive tree structures, map preorder indices to positions in a recursively defined Fi...
Compute 5-minute rolling average load
This question evaluates understanding of sliding-window aggregation and efficient data-structure design for time-series event streams, focusing on com...
Find first CIDR block covering IP
You are given: - A single IPv4 address as a string, e.g. "192.168.1.5". - A list of CIDR blocks (IPv4), each as a string in the form "a.b.c.d/x", wher...