This is a broad question and just shows how little the interviewer knew about the job they were interviewing for. Just answered I was not an Expert, but had plenty of experience and detailed my experience.
I would carefully introduce myself and my qualifications and let them know they are getting the best experience possible. I would make them aware that if they had any concerns to be open with me about them.
I have dealt with injuries on the sports field during my time as a high school soccer coach. I have also dealt with impaired people at sporting events because I work as a security supervisor at a major sports venue.
The code sleep(1000); puts thread aside for exactly one second. The code wait(1000), causes a wait of up to one second. A thread could stop waiting earlier if it receives the notify() or notifyAll() call. The method wait() is defined in the class Object and the method sleep() is defined in the class Thread.