Possible Answer #1:
“I am fresher and nothing can be better for me than starting my professional career in a reputed company like yours. If everything goes well, I will be looking forward to a long stint here, as long as the company needs me.”

Possible Answer #2:
“I believe in long hauls. I have been with 2 organizations in the past, and my stints have lasted for 5+ years. Being an experienced professional in the IT sector, I have done my homework and believe this company will surely offer a best-in-class working environment and a rewarding career.

I plan to stay for a long time here, or at least for as long as my services will be valued and required.”