529 interview questions for Data Scientist (2025)

45 votes3055 runs0 comment

33 votes1815 runs1 comment

21 votes2197 runs0 comment

Théoat Mar 28, 2022

19 votes3010 runs0 comment

18 votes1335 runs0 comment

machine learning

missing data

Martinat Apr 4, 2022

17 votes3029 runs0 comment

17 votes2931 runs1 comment

16 votes2994 runs0 comment

16 votes825 runs0 comment

Martinat Mar 14, 2022

14 votes799 runs0 comment

machine learning

deep learning

Martinat Sep 19, 2022

12 votes2955 runs4 comments

12 votes1997 runs0 comment

Théoat Mar 28, 2022

12 votes1482 runs1 comment

12 votes965 runs0 comment

scikit-learn

logistic regression

11 votes2955 runs0 comment

11 votes2855 runs0 comment

11 votes1297 runs0 comment

hyperparameters

Martinat Mar 15, 2022

10 votes2233 runs0 comment

Théoat Jan 23, 2023

10 votes1975 runs0 comment

Théoat Mar 28, 2022

10 votes1204 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

Update a column in an SQL 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 ?