Which engineering degree is preferred abroad for job B.E or B.TECH

BE and BTECH are same...u can search job through applications like Bayt.com or Naukrigulf and others

in abroad I think B.E is more preferreble..it have many opportunities in abroad then b.tech

though B.E. And btech are nearly same but in abroad B.E. is more preferred than Btech. and most of the private university's in India graduate their students with a B.E. degree. BITS is one of them.

sir can a not fit for technical education certified student do bca on basis of his 12th marks and further mca?

There is no difference between BE or BTech. It is a pure nomenclature difference. Both degrees if awarded by a UGC recongnised university is acceptable abroad.