530 interview questions for Data Scientist (2025)

45 votes3133 runs0 comment

35 votes1862 runs1 comment

21 votes2241 runs0 comment

Théoat Mar 28, 2022

19 votes3086 runs0 comment

18 votes3006 runs1 comment

18 votes1365 runs0 comment

machine learning

missing data

Martinat Apr 4, 2022

17 votes3105 runs0 comment

16 votes3070 runs0 comment

16 votes836 runs0 comment

Martinat Mar 14, 2022

15 votes811 runs0 comment

machine learning

deep learning

Martinat Sep 19, 2022

12 votes3030 runs4 comments

12 votes2038 runs0 comment

Théoat Mar 28, 2022

12 votes1536 runs

12 votes982 runs0 comment

scikit-learn

logistic regression

11 votes3026 runs0 comment

11 votes2925 runs0 comment

11 votes1326 runs0 comment

hyperparameters

Martinat Mar 15, 2022

10 votes2279 runs0 comment

Théoat Jan 23, 2023

10 votes2016 runs0 comment

Théoat Mar 28, 2022

10 votes1232 runs0 comment

machine learning

missing data

Martinat Apr 4, 2022

530 interview questionsfor Data Scientist (2025)

Test your technical skills before an interview of Data Scientist with 530 corrected questions. Beginner, Intermediate or Expert level.

530 interview questionsfor Data Scientist (2025)

Test your technical skills before an interview of Data Scientist with 530 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

Update a column in an SQL table

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?

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?

Write the SQL query to delete a column from a table

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

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

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

How to delete an SQL table?

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

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.

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 ?