I suspect that there are several things going on...
First, the interviewer may be probing for a technology enthusiast. A lot of companies give extra weight to a candidate who do independent study, or have github projects, or the like. The theory there being they want someone who is so excited about technology that they just can't stop once that 5pm whistle goes off. So, if you do have any such projects/interests, it's proper to bring them up.
Second, as other have said, interviewer may be probing for your learning style. How do you learn a new language or framework anyway? Me, I pick a project that is interesting. Say, make my own version of a favorite childhood video game. Some people like to work through tutorials. My boy prefers to work through K&R  -- mostly because I pay him for the completed exercises... ;D
Third, interviewer is explicitly asking you if you do keep up with new trends. Again, on the theory that such people will be enthusiastic technologists. If you do, it can't hurt you to bring it up. If you don't, you could speak to when technology advances introduced themselves to you, specifically at work.
 K&R is an old nickname for the first book describing the C language. It was written by Kernighan and Ritchie, published 1978, and titled "The C Programming Language". It is much beloved, and has graced the lives of generations of students. Link: https://en.wikipedia.org/wiki/The_C_Programming_Language . The book contains the original "Hello, World" program!