Want to crack your next Data Science or ML interview? These 5 ChatGPT prompts will help you practice like never before

Interviews for Data Science and Machine Learning roles are tough. You’ll be asked to solve business cases, explain technical concepts, and even tackle behavioral questions under pressure.

But here’s the good news: with the right ChatGPT prompts, you can simulate real interview scenarios, practice your answers, and walk into the room with confidence.

Below are 5 sample prompts (from my new ebook The Ultimate Prompt Book: 100+ ChatGPT Prompts for Data Science & ML Success) — along with example outputs — that can help you prep like a pro.

Prompt 1: Simulated Interview Questions

Prompt: “Act as an interviewer for a Data Scientist role. Ask me 5 technical questions covering: statistics, SQL, ML concepts, business case, and behavioral. After I respond, evaluate my answer and give specific feedback.”

Output (shortened):

Question 1 — Statistics

Suppose you run an A/B test comparing two versions of a landing page. Version A had a conversion rate of 12% over 1,000 users, while Version B had a conversion rate of 14% over 1,000 users. How would you test if the difference is statistically significant?

Question 2 — SQL

You have a table called transactions with the following columns:

• transaction_id

• customer_id

• amount

• transaction_date

Write an SQL query to find the top 3 customers with the highest total spend in the last 6 months.

Question 3 — Machine Learning Concepts

Explain the difference between bias and variance in machine learning models. How do they affect model performance?

Question 4 — Business Case

You are working for an online retailer. Management asks you to build a churn prediction model to identify customers who are likely to stop purchasing. What business and technical steps would you take to approach this problem?

Question 5 — Behavioral

Tell me about a time when you worked on a project where the results did not meet stakeholder expectations. How did you handle it?

👉 Go ahead and answer Question 1 first (Statistics). After your answer, I’ll give you targeted feedback before we move on to Question 2.

….. Output ends

👉You can see that with this prompt, you don’t just get standard practice questions — you also get feedback on your answers.”

Prompt 2: STAR Method for Behavioral Qs

Prompt: “Help me answer: ‘Tell me about a time you failed at a project.’ Structure it using STAR (Situation, Task, Action, Result). Then suggest 3 improvements.”

Example Output (shortened):

• Situation: In my previous role, I was leading a small data science project to build a sales forecasting model for a retail client. We had tight timelines because management wanted quick insights before the holiday season.

• Task: My responsibility was to ensure the model was built, validated, and deployed on time so that the business team could use it for inventory planning.

• Action: I focused heavily on model accuracy and kept experimenting with advanced techniques, which delayed integration with the business workflow. I also underestimated the importance of aligning early with stakeholders on what level of accuracy was “good enough.” As a result, we spent too much time tweaking models and missed the deadline for deployment.

• Result: Although we eventually delivered a highly accurate model, it was too late for the client to use for holiday planning. This was a failure in terms of business impact, even though the technical work was strong.

👉 After this, ChatGPT suggests 3 improvements and also proposes to “reframe this answer into a more positive “failure that became a learning” story so it feels less risky in an interview?”

Prompt 3: Explaining Complex Concepts Simply

Prompt: “Ask me to explain ‘data pipelines’ to a 10-year-old. After my attempt, refine my explanation and also rewrite it for executives.”

Example Output:

• For a child: “It’s like a water pipe carrying data instead of water, from one place to another.”

• For executives: “A data pipeline automates the flow of raw data into usable reports, ensuring consistency and speed in decision-making.”

👉 Mastering this skill helps you communicate across technical and business audiences.

Prompt 4: Mock Case Study Roleplay

Prompt: “Case: Netflix wants to improve its recommendation system. Act as hiring manager and ask me 5 structured questions step by step. Give feedback after each answer.”

Example Output (sample questions):

1. What data sources would you use?

2. How would you measure recommendation effectiveness?

3. What business objectives would you target (be specific)?

4. Which primary and guardrail metrics would you optimize (offline & online)?

5. How would you handle trade-offs (e.g., watch-time vs. satisfaction/novelty/diversity)?

Your turn: Answer Q1. Keep it concise (bullets OK).

👉 Practicing this way ensures you won’t freeze when facing real case interviews.

Prompt 5: Recruiter Role-Play

Prompt: “Simulate a recruiter asking: Why are you interested in this role? What’s your expected salary? Why should we hire you? After my answers, refine them to sound professional yet natural.”

The above prompt will generate the below output.

You can practice without the fear of failure or being judged! No more awkward pauses or generic answers — you’ll sound polished and confident.

Final Thoughts

These are just 5 prompts from a toolkit of over 100+ ChatGPT prompts I’ve carefully designed for Data Science & ML professionals.

If you found these useful, you’ll love the full collection in my new ebook:

👉 The Ultimate Prompt Book: 100+ ChatGPT Prompts for Data Science & ML Success

Whether you’re preparing for your first interview, switching careers, or simply sharpening your skills, this book is your AI-powered career accelerator.

Go ahead, practice with these prompts, and walk into your next interview ready to impress🙌