DCA

Of course, if you have math/stat. /CA/ CS in PUC according to university rules you'll get admission. It would be easy for you to understand the concepts.

Yes, in mostly states DCA is compulsory for patwari with a graduation degree from a recognised university of college.

10+2 from a recognised board of education. Career prospects like :- graphic designer, computer operator, c+ devloper, etc.

Yes, it's good but you can also opt for graduation degree along with it. You can opt for correspondence for doing it along with Diploma course. Because graduation degree is a must for great career opportunities in future. Most companies require candidates with a eligibility criteria of a graduation degree along with the skill set required for that job.

Generally, this programme imparts specialisation in the following fields:
Basics computer skills
MS Office applications
ERP basics
Internet basics
E-Business
Software hacking & IT security
PC assembly and trouble-shooting
Software engineering.

Candidates wishing to apply for the course need to have completed graduation/ post-graduation with a minimum of 10+2+4 years of formal education with Mathematics as one of the main subjects, and from a recognised university/institute. Candidates in the final year of graduation/ post-graduation are also eligible to apply. Please note that the eligibility criteria to pursue PGDCA may vary from institute to institute.

Dear student, please go through this website for more information related to your query, this will help you. https://www.shiksha.com/university/ignou-indira-gandhi-national-open-university-delhi-3030/course-post-graduate-diploma-in-computer-applications-pgdca-740305.

Tap the link below to fetch all necessary details~
https://www.shiksha.com/it-software/articles/career-opportunities-after-completing-diploma-in-computer-applications-blogId-4575.