How to answer "Your experience in supervision of research students"? I finished my PhD in 2013. I don't have any experience in supervision of research students. When I apply for teaching job uni. always ask me "Your experience in supervision of research students". How to answer those kind questions properly?
If the jobs you are applying to expect you to have experience teaching research students and you have none, there is really no explaining away of this problem. I see basically two fixes:


Get this experience. I am not sure how feasible this is wherever you work, but in my university in Europe, everybody who wants experience teaching students can get it. There are plenty of research master students or even undergrads that need supervision, and getting involved with teaching them is usually not more complicated than telling the lab head or responsible coordinator that you would be available. Of course, then you also need to be prepared to put in the hours - teaching research students is definitely not something that you can do with an hour on the side here and there, as these inexperienced researchers typically need some serious time commitment to get them started. Incidentally, the fact that it is so easy to get experience supervising students is also the reason why universities in my area consider it as a red flag if you have none - they interpret this as "I actively tried to get out of supervising students".
Find jobs to apply to that don't require teaching research students. If you for some reason don't want to be involved with teaching research students, you shouldn't apply to positions that require this. What you could maybe still do is apply to positions that are very (undergrad) teaching-centered, such as liberal arts colleges in the US or Universities of Applied Sciences in the German-speaking areas. That being said, if you don't want to be involved with research at all, you may be drawing slim as nowadays most universities seem to expect their junior faculty to do some research on the side.


To anser your literal question:


  How to answer those kind questions properly?


Truthfully.

"I currently do not have any experience in teaching research students, as [insert accurate reason]. Of course I will be more than willing to get this experience as soon as possible should my application be accepted."