Don’t fall into the trap of specifying job titles. Stick to natural progression. If you don’t seem too interested in what lies beyond this job, the interviewer will fear that you wont stick around for long.

A sample answer could be that you are aware that there are several skills required for the job that you need to develop on, but you believe that your own motivation for self improvements, will be developed by the time an opportunity arises. That is why you are determined to learn.