Hello Kusum,

After BCA, If you are interested for MCA then it is a good option & MCA is an advanced and more detailed version of BCA course. There are other options, You can go for testing, data mining, database manegement etc. and many other courses like these. You can also take up some networking courses like CCNA, Database Administrator, customer support, Technical Analyst, Server Securit and Maintenance etc.

If you are good about the software application you can go for

Linux Administration

Networking

Cloud Computing

To choose a option depends on your interest.

Good Luck!