529 interview questions for Data Scientist (2025)

41 votes2856 runs0 comment

31 votes1690 runs1 comment

21 votes2061 runs0 comment

Théoat Mar 28, 2022

19 votes2813 runs0 comment

18 votes1250 runs0 comment

machine learning

missing data

Martinat Apr 4, 2022

17 votes2829 runs0 comment

16 votes2796 runs0 comment

16 votes2738 runs1 comment

15 votes795 runs0 comment

Martinat Mar 14, 2022

14 votes770 runs0 comment

machine learning

deep learning

Martinat Sep 19, 2022

12 votes1872 runs0 comment

Théoat Mar 28, 2022

11 votes2766 runs0 comment

11 votes2757 runs4 comments

11 votes1214 runs0 comment

hyperparameters

Martinat Mar 15, 2022

11 votes915 runs0 comment

scikit-learn

logistic regression

10 votes2668 runs0 comment

10 votes1326 runs1 comment

9 votes2101 runs0 comment

Théoat Jan 23, 2023

9 votes1861 runs0 comment

Théoat Mar 28, 2022

9 votes1129 runs0 comment

machine learning

missing data

Martinat Apr 4, 2022

529 interview questionsfor Data Scientist (2025)

Test your technical skills before an interview of Data Scientist with 529 corrected questions. Beginner, Intermediate or Expert level.

529 interview questionsfor Data Scientist (2025)

Test your technical skills before an interview of Data Scientist with 529 corrected questions. Beginner, Intermediate or Expert level.

Write a SQL query to retrieve the list of employees with a salary greater than 5100.

Write a Python function that returns the factorial of a number.

Write a Python function that prints the elements of a list.

Select only distinct values in a column using SQL

How to handle missing data in a given training data set ?

Write a SQL query to insert data into a table

Which SQL keyword is used to sort the result of a SELECT statement?

Update a column in an SQL table

What is the missing word in the following sentence: Overfitting is the production of a model that corresponds too closely to the training data set and may therefore fail to fit other data sets and so fail to perform any reliable forecast.

What is the relation between Artificial intelligence (AI), machine learning and deep learning?

Use the zip() function to iterate over two lists in parallel.

How to delete an SQL table?

Write the SQL query to delete a column from a table

The validation set is used to provide frequent and unbiased evaluations of the model’s fit on the training set while tuning its hyperparameters/parameters: in other words,the model is found and then tested on the validation set before to be improved once again.

What is the value of the decision threshold used with logistic regression in Scikit-learn?

Write a SQL query to retrieve the products with a price less than 1000 and sort the results in descending order of price.

Write a SQL query to retrieve the titles of books written by 'John Smith'.

Start a HTTP server from the CLI with python

What type is `function_a` in the following code ?

How to handle missing data in a given training data set ?