The challenge had 3 parts: SQL, Experiment Design, and Machine Learning.
In the SQL portion you had to write some queries to answer complicated real world questions (without any data given, just a schema).

In the experiment design portion you are asked to create a hypothetical plan to answer testing a new app.

In the Data Science portion, you are asked to perform binary classification on a given data set, and return insights from the classification.

Question

The challenge had 3 parts: SQL, Experiment Design, and Machine Learning.
In the SQL portion you had to write some queries to answer complicated real world questions (without any data given, just a schema). 

In the experiment design portion you are asked to create a hypothetical plan to answer testing a new app. 

In the Data Science portion, you are asked to perform binary classification on a given data set, and return insights from the classification.

Utilisateur anonyme · Accepted Answer

The SQL questions were to write executable code with quite complex problems, that took me about 70 lines of SQL each.

I wrote about a page outlining a randomized experiment to test the efficacy of a new app.

In the classification problem, I used random forest as a classifier and reported on the feature importances.

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