Diploma

Yeah sure.
All the diploma holders are eligible for the lateral entry in B.tech. If you have completed diploma then you can get admission in 2nd year of B.tech/B.E with the same course/field/branch as you had in Diploma.
I hope you understand.
Thanks.

To get admission in B.Tech after the completion of Diploma, you have to appear for the lateral entry exams like- Polytechnic, JELET, etc. Through these lateral entry exam, you can get admission in B.Tech course. So, go for these exams.
All the best.

No, you can't get admission for the course you have mentioned above because as you have completed Diploma in civil engineering so you are experienced in that field. So, I will recommend that you should do something in the same branch for your betterment.
Thanks.

Hello,
Kindly visit this link:
https://www.shiksha.com/college/m-s-ramaiah-polytechnic-s-r-nagar-bangalore-19262
https://www.shiksha.com/college/ramaiah-institute-of-technology-m-s-r-nagar-bangalore-474/admission

Hard work is needed everywhere. Look out for your interest. If you are strongly in need of a job, go for ECE, EEE or CS. Even mech and civil engineering is good.

Yes, they can. All graduations are accepted as basic requirement for PG Diploma in Mass Comm. I did OG Diploma in JMC after my M.Phil. but the basic qualification for the Distance Education remained BA for me. I did MA after this. PG diploma tool. The forms shall be coming in the coming month and can be filled till September.

Hello,
Yes, you can do Diploma in marketing after completing class 10th. For more information, you can visit the given link.
https://www.shiksha.com/business-management-studies/course/diploma-in-sales-and-marketing-management-all-india-institute-of-management-studies-mandaveli-rd-Chennai-37397
Thanks.