Nitte is good college but these year less members are selecting for campus selection. High companies are visiting there like hp,ibm,infosys,etc .And it's very difficult to get seat there. Management fees is too high. So alvas good because in less fees good education and campus. 

3 to 4 years ago alvas campus was not good. These days campus is very good. I suggest u alvas. 

In nitte also it is not possible to get job for all. If your speaking is good and your attitude then you can

U may get seat in nitte through cet but it may not be your choice also. So don't think about college and give importance to ur course. Bcz atlast u can even go for other colleges for campus selection. Getting work is not difficult but choose ur best course. 

Either choose nitte or alvas

As I know nitte is top college but everyone are impossible to get seat there. Through cet sometimes gets seat in nitte but u won't get your interested course . If u have hope on cet then u choose nitte. Next to nitte is alvas. Alvas is developing much more. It is famous cllg.Many companies are coming to select so I hope next to nitte is alvas. 

Alvas has strict rules and regulations. But it's good to keep students in control. 

All the best

Dear aspirant ,
If you are getting NMAMIT Then go for it because the college is in top engineering colleges of India and have a very good placement record as well as the college infrastructure is also very good overall it is a good place to pursue your engineering with computers I recommend this college more than SJEC because SJEC college is famous for there mechanical engineering as well as Electrical Engineering on the other hand the rank of SJEC and Alvas college is going down day by day along with the placements so in my opinion NMAMIT is good college then all three of them.
Also this college improve its rank in MHRD rankings last year it was around 167 in all India but this year it is on 131 rank in all over India that means the college is developing day by day.  So in my opinion it is a good college you should go for it .
Hope it helps