C3 AI Machine Learning Engineer Interview Questions
& Process
Real candidates share what happened, how many rounds they had,
and how the experience turned out.
Based on 6 interview experiences · FREE TO READ
Candidate interview experiences
First-hand accounts from people who interviewed at C3 AI.
C3 AI
Machine Learning Engineer
Senior Easy Neutral experience No offer 4 rounds
Interview process
Recruiter call Technical screen Onsite
Interview formats
Coding Technical System Design
The interview process started with a hiring manager interview, followed by a 3-hour technical assessment. This technical part included two coding interviews and one database schema design interview. They then invited me for an onsite interview, which I declined. The people working there seemed nice, but one interviewer mentioned potential team changes due to shifting company priorities, which was a concern for me.
Confirmed questions3 questions
- Could you solve the lowest common ancestor problem?
- How would you approach a sliding window problem on LeetCode?
- Design a database schema for a library system.
C3 AI
Machine Learning Engineer Intern
Intern Difficult Positive experience No offer 2 rounds
Interview process
Take home Technical screen
Interview formats
Coding Technical
Submitted my application via Indeed, including a cover letter. Then, I completed a coding test and answered some basic ML-related questions. The ML and deep learning questions weren't too tough, but the coding test was on the challenging side.
Confirmed questions1 question
- The coding question was about medium-hard difficulty.
C3 AI
Machine Learning Engineer
Entry Difficult Neutral experience No offer 1 round
Interview process
Take home Technical screen
Interview formats
Coding Technical
Got a mail with a hackerrank coding challenge. It had 3 leetcode-style problems (I'd say 1 easy and 2 medium) plus a multiple-choice section with lots of machine learning questions.
Confirmed questions2 questions
- What metric is used for building decision trees?
- Can you explain the difference between independent and uncorrelated variables?
C3 AI Machine Learning Engineer Interview Questions
Quoted word for word from C3 AI interview reports.
“Which data structures allow removal from both the beginning and end in O(1) time? Options are: Deque, Vector, Segmented tree.”
Read reports →“Design a database schema for a library system.”
Read reports →“Implement the logic for the minimum reject request.”
Read reports →“Can you explain the difference between independent and uncorrelated variables?”
Read reports →“What metric is used for building decision trees?”
Read report →“Can you explain the workings of the Gradient Boost model?”
Read report →“Could you solve the lowest common ancestor problem?”
Read report →“What are the core concepts in data science?”
Read report →“Can you explain the fundamentals of machine learning?”
Read report →Formats, difficulty and experience
Across all 6 C3 AI interview reports.