I had to answer for three jobs that I had a short duration of work history, it was because I was in school and could only work short hours and I had moved across the USA with my Family. So just be aware of duration spent with previous employers and know what to say and explain yourself in detail. This isn't a subject they take Lightly because they are going to spend lots of money training you and they want you to stay with them a long time. Its a career choice not a job.
