Help required in filling DS-160?

I am working as a software engineer from 2 years in the same company.

In Ds-160 What should I give for primary occupation?

Do i have to tick YES in Previous Employment Section and fill my current employment details or as i am working with same company after my graduation , shouls i say NO?

How should i fill my PRIMARY OCCUPATION and PREVIOUS EMPLOYMENT sections?

urgent PLeaseeeeeeeee

Your primary occupation would be COMPUTER SCIENCE.

There is no previous employment for you.