fnu as last name in visa and i have my name correct in I20

i have my name in passport as

surname:
given name: ramula anirudh

in visa

surname: ramula anirudh

first name: FNU

in I20

surname:ramula

first name:anirudh

can u please tell me it will be any problem at immigration port of entry with different pattern of names in i20 and visa?

No, this is not a problem. Just point out your full name at port of entry as displayed in I-20. ‘First Name Unknown’ (FNU) is a computer generated error.

Best wishes

Dr. Sandeep Shankar, Colorado Heights University, www.chu.edu