Degree

Hi,
CA/ CS is not mandatory for CAT exam. Students from B.Tech, B.Sc etc. And all field give this exam. Scoring a good CAT and UG % is very important to get admission in good college. Go through the prospectus of the CAT for more information.

Here is a possibility of an improvement exam, but you need to go to Delhi university complex examination branch and ask there Take application form. It is in the north campus of DU.

You can study in foreign institute, you will have to prepare your SOP and clear language exams. Follow this link for more information
studyabroad. Shiksha. Com.

For becoming psychologist, you need to study psychology at graduation level instead of law and then seek specialisation in criminal psychology. There is one more way that touches this field. You will have to study extensively criminology. One field of this deals with criminal psychology.

Hi,
You can study in foreign institute, you will have to prepare your SOP and clear language exams. Follow this link for more information
to study abroad. Shiksha. Com.

Hi,
The most opted courses after studying B.Sc Electronic is Masters i.e M.Sc in electronics or MBA. You can go for these.

Hi
It is always better to pursue your field directly. Visit this link:
https://www.shiksha.com/mass-communication-media/film-tv/colleges/colleges-india?rf=searchWidget&landing=ctp

No, for B.Tech lateral admission, You need to appear in an entrance test conducted by Royal Global University followed by Personal Interview.
Or
The candidate shall have to appear in a State Level Admission Test conducted by an appropriate authority as recognized by Royal Global University.

You cannot do two degrees from regular college. The degrees having same completion Year becomes invalid but all depends on your interests. You can do one from distance or open or other from regular.