Do both!
Website for online exposure and printed PDF for interviews.
For me, my printed portfolios were always a hit simply because barely anyone brings them. I ALWAYS got a nice compliment on having it and ALWAYS got asked if the interviewer could keep a copy.
My interviewers told me it was a nice change from the norm which was people huddled around a laptop or iPad screen or having to fumble with sorting out getting it on a projector. It also means those interviewing you can focus on parts that may peak their interest more than only getting the one chance of it popping up on screen.
For me, I prepared a book in InDesign and then had it printed and bound by and online service for something silly like $14 per book. When I started my current job 3ish months after my interview, my boss still had it in his mini bookshelf on his desk and said I was the only one they had in the office that came with a physical book.
