What is the difference between left join and right join?

Explain the difference between correlation and causation.

What are the differences between Bag of Words and Word Vectors in NLP?

Explain the concept of a loss function and feature engineering.

What are your strengths and weaknesses?

How would you approach analyzing a dataset with millions of rows?

Can you briefly describe your experience with managing projects?

How would you handle outliers in a dataset?

Explain the difference between descriptive and inferential statistics, providing examples of each.

Describe the concepts of Type I and Type II errors in hypothesis testing, along with their implications in decision-making.

Why do you want to work at OpenAI?

What are SQL window functions and when to use RANGE BETWEEN?

The PM responsible for Facebook events has a new idea to drive engagement – when your friends mark that they’ll attend an event, you will get a notification. How would you measure the success of this notification? What counter-metrics would you look at?

Why do you want to work here?

How would you handle situations where the chosen metrics may be influenced by external factors?

How would you measure user engagement in an A/B test?

How do you handle NULL values in SQL queries?

Can you explain the concept of effect size and its relevance in interpreting A/B test results?

What A/B testing pitfalls might you encounter?

Explain the bias-variance tradeoff