OpenAI
Leading AI research laboratory developing state-of-the-art foundation models like GPT-4.
5 Rounds
~21 Days
Very 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
Cloud Engineer
•
Coding
•
hard
Implement a token bucket rate limiter in Python or Go. Explain how you would adapt this to work across a distributed cluster of API gateways.
#Rate Limiting
#Distributed Systems
#Redis
Cloud Engineer
•
Coding
•
medium
Write a Python script to parse a massive stream of distributed logs, identify spikes in specific HTTP 5xx errors, and output the top 3 offending IP addresses.
#Python
#Log Parsing
#Data Structures
#Streaming
Cloud Engineer
•
Coding
•
medium
Implement a task scheduler that takes a list of tasks with dependencies and executes them in the correct order. If a cycle is detected, throw an error.
#Graphs
#Topological Sort
#DFS/BFS
Cloud Engineer
•
Coding
•
medium
Given a list of IP CIDR blocks, write a function to merge all overlapping blocks and return the minimized list of CIDRs.
#Intervals
#Networking
#Python/Go
Cloud Engineer
•
Coding
•
easy
Implement a basic load balancer algorithm in code that routes requests to a pool of backend servers using Weighted Round Robin.
#Load Balancing
#Data Structures
#Math
Cloud Engineer
•
Coding
•
hard
Write a function to find the shortest path in a network of microservices to identify the root cause of a cascading failure, given a graph of service dependencies and their current error rates.
#Graphs
#Dijkstra
#BFS
Difficulty Radar
Based on recent AI-sourced data.
Meet Your Interviewers
The "Standard" Interviewer
Senior EngineerFocuses on core competencies, system constraints, and clear communication.
SimulateUnwritten Rules
Think Out Loud
Always explain your thought process before writing code or drawing architecture.