Diploma

Both are having their own importance in their respective field. Hence they both are having scope in job perspective. Please tell me why you want to know exactly about this?

Yes friend. You can get admission in B.Tech. Apply for Anna University lateral entry counseling, check previous year's cut-off, and also approach deemed universities.
All the best.

Please mention which exam you want to appear for.

Please refer to the link provided below for a detailed list of colleges, which offer Diploma in instrumentation from India. You should be able to navigate to a college of your choice using the filters on the web page. Regards. https://www.shiksha.com/engineering/colleges/diploma-instrumentation-tech

You are already doing your PGDM. Why do you want to appear for cat again?
But to answer your question, you can give your CAT again. But, you need to quit the college. If your tenure is done, you can just apply for CAT but you cannot clear it.
I think you should continue doing your PGDM in marketing, a

B.Tech ECE: Admission Process:
For seeking admission FOR B.Tech ECE, students need to clear the entrance exam, group discussion and personal interview round. Joint Entrance Examination (Main) - It is conducted for B.Tech ECE admission programme in most of the prestigious institutes of India. The skil

You should not go for a distance programme, if you are younger and going to pursue your first degree. Distance programs are for those who are in job and may be joining their higher or second degree. Secondly, you should know that distance programs in engineering are not valid. Moreover, an economica

Diploma courses are offered by Polytechnic and junior colleges. NUS has a website, you can check it to know the programs they offer.

The class timings are from 9 am to 5 pm or 10 am to 6 pm.