I had a phone screen with HR, who was really friendly.

We fixed a phone interview date during the conversation, during which the HR explained the internship project I might get.

The phone interview was with a Data Scientist at LinkedIn (I knew this beforehand as HR had mentioned his name), so I prepared for more machine learning questions. But, voila, the interviewer threw a coding question as soon as the interview began.

I didn't do particularly well. The interviewer was patient and helpful, but nothing helped.

This is basically the climbing stairs question on LeetCode, with the alteration that the number of steps that can be climbed is given by a variable k.