Databricks
Unified analytics platform built on Apache Spark for data engineering and ML.
4 Rounds
~21 Days
Hard
The Interview Loop
Recruiter Screen (30 min)
Standard fit check, behavioral questions, and resume overview.
Technical Loop (3-4 Rounds)
Deep dive into domain knowledge, coding, and system design.
Interview Question Bank
Software Engineer
•
Behavioral
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medium
Databricks heavily values 'First Principles' thinking. Tell me about a time you solved a complex technical problem by breaking it down to its fundamental truths rather than relying on existing analogies or standard practices.
#Problem Solving
#First Principles
#Innovation
Software Engineer
•
Behavioral
•
medium
Tell me about a time you identified a significant bottleneck in a production system and took the initiative to fix it. How did you measure the impact?
#Initiative
#Performance Optimization
#Impact
Software Engineer
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Behavioral
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medium
Describe a situation where you disagreed with a senior engineer or manager on a system design choice. How did you navigate the disagreement and what was the outcome?
#Communication
#Conflict Resolution
#Truth-seeking
Software Engineer
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Coding
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hard
Implement a Key-Value store that supports transactions with `begin()`, `commit()`, and `rollback()` methods. It must handle nested transactions efficiently.
#Hash Map
#Stack
#State Management
Software Engineer
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Coding
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medium
Implement a Lazy Iterable class that takes a list of iterables and a mapping function, and evaluates the elements lazily. This simulates how Spark RDD transformations operate before an action is called.
#Iterators
#Lazy Evaluation
#Generators
Software Engineer
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Coding
•
medium
Given a string containing parentheses and lowercase characters, remove the minimum number of invalid parentheses to make the string valid. Return any valid result.
#Strings
#Stack
Software Engineer
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Coding
•
hard
Implement a concurrent web crawler. Given a starting URL and a maximum depth, crawl the web pages efficiently using multiple threads without visiting the same page twice.
#Multithreading
#Graph Traversal
#Synchronization
Software Engineer
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Coding
•
medium
Implement a data structure that supports `insert(key, value)`, `get(key)`, and `setAll(value)` all in O(1) time complexity.
#Hash Map
#Versioning
#Data Structures
Software Engineer
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Coding
•
medium
Given a list of tasks with dependencies (represented as a directed graph) and execution times for each task, write a function to find the minimum time required to complete all tasks assuming infinite parallel workers.
#Graph Theory
#Topological Sort
#Dynamic Programming
Software Engineer
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Coding
•
medium
Implement a rate limiter using the Token Bucket algorithm. It should support multiple users, be thread-safe, and handle high concurrency efficiently.
#Rate Limiting
#Multithreading
#System Design
Software Engineer
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System Design
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hard
Design a distributed job execution engine similar to Apache Spark. How would you handle task scheduling, worker node failures, and data shuffling between stages?
#Distributed Systems
#Fault Tolerance
#DAG Scheduling
Software Engineer
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System Design
•
hard
Design the backend for Databricks Collaborative Notebooks. Multiple users can edit the same notebook concurrently, execute code cells, and see the output in real-time.
#Operational Transformation
#WebSockets
#Concurrency
Software Engineer
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System Design
•
hard
Design an auto-scaling service for Databricks clusters. The service needs to monitor cluster utilization and dynamically add or remove cloud instances (e.g., EC2) based on workload demands while minimizing cost.
#Cloud Infrastructure
#Auto-scaling
#Resource Management
Software Engineer
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System Design
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hard
Design a high-throughput, low-latency distributed message queue (similar to Kafka) that guarantees at-least-once delivery.
#Distributed Systems
#Messaging
#Replication
Software Engineer
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Technical
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hard
Explain how you would diagnose and resolve a Spark application that is suffering from severe data skew and frequent OutOfMemory (OOM) errors during a large join operation.
#Apache Spark
#Performance Tuning
#Distributed Computing
Difficulty Radar
Based on recent AI-sourced data.
Meet Your Interviewers
The "Standard" Interviewer
Senior EngineerFocuses on core competencies, system constraints, and clear communication.
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Think Out Loud
Always explain your thought process before writing code or drawing architecture.