B.Sc

Yes, you can do MCA.
B.Sc (IT) is a very good course and there are many other courses listed below:
1. MCA (Master of Computer Application)
MCA is the most preferred course after doing B.Sc (IT), you can opt for any stream in MCA whether it is programming and development, database or testing or networking. It depends on you that which stream you want to choose.
All the streams in computer applications have a lot of scope for you to get a very good job.
There are many universities where MCA is running and you can get admission in this course by taking an entrance exam held by the university of your choice. You can also do this course through correspondence if you are doing any job and not having time to do a regular course. I think IGNOU (Indira Gandhi National Open University) is the best university in India to do this as a correspondence course.
2. M.Sc (IT):
M.Sc (IT) is also a good course after B.Sc (IT) and this course is also a service providing course. The duration of MCA is 3 years and for doing M.Sc (IT) you have to study for four semesters or 2 years. You can also do this course through correspondence.
3. If you want to do any short-term course after your B.Sc.(IT) then first of all, decide which field you like and then do the course accordingly.
For the database, there many courses which you can do and they are:
1. MCDBA Certification (Microsoft Certified Database Administrator)
2. ODAC Certification (Oracle Database Administration Courses)
3. Certification course in BerkeleyDB
4. Certificate course in DB2
5. Certificate course in PostgreSQL
6. Certificate course in Firebird
Most popular courses are MCDBA for SQL Server and ODAC for Oracle data base.
For networking, you can choose any of these courses:
1. CCNA (Cisco Certified course in Networking)
2. MCSE (Microsoft Certified Course in Software Engineering)
3. Certificate course in Networking from Jetking.
If you want to go into programming field then you can do a certificate course in any of the languages and technology.
-Java
-.Net
-C#
-PHP
-C+
-HTML and DHTML
-Haskell
-Scala
-Standard ML and OCaml
-Scheme
You can do an Advanced certificate course in Linux as Linux is used in high secure departments and there are many jobs for Linux in the government sectors.
Best of luck.