[EDIT: see below] During a job interview, when they ask if you
know something, quickly ask yourself, "Can I learn this on the
job?" If you think you can, then say "Yes I do". * Since every
job has a probational period (1st for 3 weeks to see if you're
not homicidal, and about 3 months to see if you can hack it),
it's enough time for you to learn whatever you said "yes" to. *
EDIT: A straight "Yes, I do", if it is an absolute lie, be
careful. Might be best avoided. What might be better is: "I
don't know the specifics of what you need for this position, but
I'm a fast learner and I'll pick up what I need to know quickly,
as I have comparable knowledge in...[x], [y], [z], etc",
highlighting transferable skills. I wrote this because I've seen
too many people who continue to stock shelves (nothing wrong
with stocking shelves mind you) because they're afraid to try
something new. They may lack the schooling, but they have the
knowledge. They may lack the certification, but they're capable
of the job. But they're afraid because they don't feel official
enough. They get stopped at the gates of Human Resources without
realizing there's other ways to get employment that can make use
of their skills.