Hello ruturaj3
I would like to clear u few things 1st.
MCA exists in 2 streams. one is Managemet and other is Science / Comp Science.
They have altogether diff subjects.
Both streams has equal opportunities but diff workouts.
MCA science has upper hand than MSc IT as per industry trade.
Few Colleges in Pune Univercity runs both Courses. Most colleges opts for Management.
Here is the Link for futher details *www.mamimca.org/
Now while preparing for MCA CET, u can also check for Cetifications as per ur choice. (Networking, SQL DBA, Oracle (OCP), Microsof... etc)
It also depends on which tech u r comfertable with?
Java / PHP / Microsoft / Linux...
It true what "FilledVoid" said.
Duration of these courses may matters. (Including Indust. Traing / Project).