US Army 25B interview questions

At MEPS station after taking ASVAB and getting my score the recruiter sat down with the MSG and I to pick my MOS I told them I wanted 25B they told me that there were no slots for 25B I said ok got up and walked out my recruiter came out in the hall and called me back in after a few minutes and told me ok we they found a slot and you leave in 3 weeks. Be persistent with what you want don't just take an answer that they give you.