Interview QuestionBank

Could you outline the process of calculating the correlation between a binary variable and a continuous variable?

How do you tackle the issue of high cardinality within categorical data fields?

What methods have you found useful for determining the most appropriate value of "k" for a given dataset using the K-means algorithm?

What methods have you found useful for determining the most appropriate value of "k" for a given dataset using the K-means algorithm?

Can you walk us through your process of writing a JavaScript function to find the maximum sum of a contiguous subarray in an array of integers?

Tell me how you would calculate the shortest distance for a knight on an infinite chessboard to move from A to B.

Can you outline the steps to build a reduce() function in JavaScript, focusing on aggregating array values through a callback?

What method do you use to ascertain the success of a marketing channel?

What optimization methods are you aware of and comfortable discussing? How do you optimize in a situation where there are a million variables involved? How does simplex navigate through the potential solutions in an optimization problem?

What techniques do you use to position an element centrally over an image?

How would you describe PCA and what drawbacks might it have?

What steps does a bounding box regressor take to localize objects in images?

Can you explain how to create a JavaScript function that outputs a date as a human-readable elapsed time, including considerations for different time scales and localization?

Can you explain how to create a JavaScript function that outputs a date as a human-readable elapsed time, including considerations for different time scales and localization?

Could you provide a SQL query to find the set of unique communicators from a table named messages containing the fields id, sender_id, receiver_id, and message?

Could you provide a SQL query to find the set of unique communicators from a table named messages containing the fields id, sender_id, receiver_id, and message?

Explain your approach to crafting undefinedToNull(), aimed at substituting undefined object values with null.

When it comes to machine learning, what does regularization mean to you and how does it work?