Data Engineering Intern OR Student Co-Op
Posted Sep 18, 2025 · We last checked this listing on Oct 6, 2026
Likely interview questions for this role
Written from this job description, not a generic list. Each one notes what the interviewer is really checking.
About your past
Tell me about a data project you built in school or on your own. Where did the data come from and where did it end up?
What they are checking: Whether they have moved data through a pipeline end to end, not just analyzed a clean file.
Tell me about a time you got stuck on a technical problem. How long did you wait before asking for help?
What they are checking: Whether they balance independence with asking questions, a key intern skill.
How would you explain what a data pipeline does to someone in marketing?
What they are checking: Whether they can talk about technical work in plain language to non-technical coworkers.
What do you hope to learn on the data team, and what would make this internship a success for you?
What they are checking: Their motivation and whether their goals line up with the team's work.
What would you do
You load a file and the row counts do not match the source. How would you track down the problem?
What they are checking: Debugging instinct and attention to data quality, which matters more than speed for an intern.
DCI Marketing works with retail displays and audit data. What kinds of data do you think a retail merchandising company collects?
What they are checking: Curiosity about the business and how data supports retail environments and brand programs.
About the work
Write out loud a SQL query to find the top five stores by sales last month. What would you watch out for?
What they are checking: Core SQL comfort with grouping, filtering and ordering, which data engineers use daily.
What is the difference between a data warehouse and a data lake, in your own words?
What they are checking: Basic data architecture vocabulary they will hear on day one.
What Python have you used for working with data, and what libraries do you reach for?
What they are checking: Whether they can script data cleaning and loading tasks without heavy help.
How do you keep your code organized and understandable for someone else?
What they are checking: Habits like version control and documentation that make an intern's work usable after they leave.
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Practice this out loudThe full job description
As published by Marmon Holdings.