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
Data Scientist
•
Coding
•
medium
Write a SQL query to calculate the week-over-week rolling retention rate for ChatGPT Plus subscribers, specifically isolating users who upgraded from the free tier within the last 30 days.
#Window Functions
#Cohorts
#User Retention
Data Scientist
•
Coding
•
medium
Write a SQL query to find the top 1% of OpenAI API users by token volume who also have an error rate (e.g., HTTP 429 Rate Limit) exceeding 20% over the last 7 days.
#Percentiles
#Aggregations
#API Metrics
Data Scientist
•
Coding
•
medium
Write a SQL query to calculate the week-over-week retention rate of ChatGPT Plus users who utilized the Advanced Data Analysis feature within their first 3 days of upgrading.
#Retention
#Window Functions
#Cohorts
Data Scientist
•
Coding
•
medium
Using SQL, find the top 1% of API users by total token consumption over the last 30 days who also have a prompt-to-completion token ratio greater than 5:1.
#Percentiles
#Aggregations
#Filtering
Data Scientist
•
Coding
•
hard
Design a SQL query to detect potential API key sharing by identifying accounts with requests originating from more than 5 distinct IP addresses within a rolling 10-minute window.
#Self-Joins
#Rolling Windows
#Anomaly Detection
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.