Computers & IT (Non-Engg)

In computer networking, hacking is any technical effort to manipulate the normal behavior of network connections and connected systems. A hacker is any person engaged in hacking. The term "hacking" historically referred to constructive, clever technical work that was not necessarily related to computer systems. Today, however, hacking and hackers are most commonly associated with malicious programming attacks on the Internet and other networks.

The fee differs from institute to institute.
You can refer to the link mentioned below:
https://it.shiksha.com/sap-certification-courses-in-bangalore-categorypage-10-116-1-0-0-278-106-2-0-none-1-0

There is good scope of getting a lateral entry as you do not have any additional educational qualification. After graduation, you will only get admission for the complete course.

IT is a very huge stream. Can you be specific, what you actually want to do?

After completing MCA, you have great scope.

Most of good IT companies hire IT graduates from campus. IT graduates who do not get job in campus placement struggle to get good job. Therefore, I will recommend that you do full time MCA for better career prospects.

Both field of Oracle DBA/ data base developer and Networking are equally good. If you share your educational qualifications, better advice can be provided to you.

Yes, entrance exam is must to take admission in MCA. Every university conducts their own examination.

Admission for MCA distance learning in Bhartiya Vidyapeeth University is still open.

Both the certifications are more of the technical side. If you have no interest in MCA, then maybe it is difficult for you to understand them better. MCA is not really required for networking certification.