I applied online. The process took 2 weeks. I interviewed at Delta Air Lines in May 2025
Interview
The interview process consisted of several stages. First, I had a phone screening with the recruiter. Then I had a 30-minute phone interview with the hiring manager. After that, I was given a dataset and a set of tasks where I needed to perform data preparation, exploratory analysis, and build a prediction model; I uploaded my completed work for review.
Next, I participated in a 4-hour panel interview with a team of 4–5 people, during which I walked them through my entire workflow and answered technical follow-up questions. I believe there was also one final step after that, completing the overall process.
Interview questions [1]
Question 1
One of the questions I was asked in my data science technical interview was to flatten a nested dictionary. The original dictionary contained a mix of dictionaries and lists as values, and those lists and dictionaries were also nested inside each other. My task was to fully flatten this structure into a single list.
I applied through university. I interviewed at Delta Air Lines in Apr 2025
Interview
This stage often includes questions on data science concepts and SQL proficiency.
Example questions:
"Explain how you handled data imbalance in a project."
"Write a SQL query using advanced functions like LEAD and LAG
Describe a time when you were overwhelmed at work. What was the situation, and how did you handle it?
Interview questions [1]
Question 1
Tell us about yourself ?
About my projects, my work experience
I applied for a Data Scientist position and received an online assessment relatively quickly. However, after completing the OA, I didn’t receive any further updates from the company. There was no follow-up interview or communication regarding the next steps.