Comment by sumanthvepa

Not quite in job interviews, but when I'm selling to a client, I just ask in the interview if it is okay, if I connect with them on LinkedIn. Some say yes. Others say no.

Should work in a job interview setting as well.

It also has the benefit of giving me a signal. Usually if the interview went well, the interviewer will happily agree to be connected. If not, you'll see either a refusal or subtle body language indicating discomfort with the connection. And you can then form your own conclusions about the probability of getting an offer before the firm gets back to you (or often ghosts you.)

Use every signal your prospect gives you.