Computers & IT (Non-Engg)

B.Sc. In Computer Science is an undergraduate course related to the information technology field, therefore, the job opportunity after completing B.Sc. Are mainly in the IT sector. The IT sector in India is expanding rapidly, therefore, there is always a requirement of undergraduates in computer Science in the following fields by the top IT companies in India:
System integrator
Hardware Designer
Logic Designer
Systems Analyst
System Administrator
Computer programmer
Computer Scientist
As regards to your question about which is better M.Sc. In Computer Science or MCA. As per the industry trend, there is a high requirement of MCA. Candidates in the IT industry as compared to M.Sc. In Computer Science. However, this does not mean that you should not consider M.Sc. In Computer Science. It really depends on which field you would like to go for. For example, if you are looking to go in the following fields there is more chance for you with M.Sc. Degree than MCA. Artificial Intelligence
Wireless Communication
information security
VSLI/Embedded Systems
Robotics
You also have the option to apply for lecturer job in government colleges by clearing the UGC NET exam. You should consider M.Sc. If teaching field is your priority. MCA. Is an attractive option if the fields you are interested in are mentioned below because there is a huge scope in these fields with Masters in Computer Applications. Web Development
Software Development
Database Administration
Hardware and Networking.

If you want to pursue a career in networking then there are two ways to do it:
1. Do specialization in computer networking by doing PG from IISc, IIT, NIT, etc. After completing PG, you will get a chance to work with networking giants like Cisco, Orange, Juniper, etc. Here you can get a chance to work in their R&D department. (Here you work as a researcher).
2. Another way is that you can enter into this field by obtaining vendor certifications like CCNA, CCNP, CCIE (Cisco track) or JNCIA, JNCIP, JNCIE (Juniper track), etc. By following this certification track, you will be able to design, install, configure and troubleshoot small to the large-sized network. This is also a good choice to enter in the networking field. (Most people follow this).
Now, the choice is yours, whether you want to become a researcher in networking field or to become a network professional.
Both ways are good. Ask yourself and decide which path to follow.