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
DevOps Engineer
•
Coding
•
medium
Write a script to parse a massive, 500GB log file to find the top 10 IP addresses making requests, optimized for memory constraints.
#File I/O
#Data Structures
#Memory Management
#Streaming
DevOps Engineer
•
Coding
•
medium
Implement a token bucket rate limiter in Go or Python that can be used across a distributed system.
#Concurrency
#Distributed Systems
#Redis
DevOps Engineer
•
Coding
•
medium
Write a function to check if a given CIDR block overlaps with a list of existing CIDR blocks in a VPC.
#Networking
#Bit Manipulation
#IP Addressing
DevOps Engineer
•
Coding
•
medium
Given a list of server dependencies (e.g., A depends on B, B depends on C), write a script to determine the correct startup order.
#Graphs
#Topological Sort
#DFS/BFS
DevOps Engineer
•
Coding
•
hard
Write a concurrent Go program (or Python with asyncio) to ping 10,000 endpoints and return a list of unreachable ones within a strict 5-second timeout.
#Concurrency
#Networking
#Goroutines
#Asyncio
DevOps Engineer
•
Coding
•
medium
Implement a basic load balancer in Python that distributes incoming requests to a list of backend servers using a weighted round-robin algorithm.
#Load Balancing
#Math
#Data Structures
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.