DCA

Visit the comparison section of Shiksha app and select DCA, you will get a chart, you can easily recognize the difference.

Hello Rajendra,
Patwari Exam is only for the applicants who possess a degree of Bachelor in any discipline from a recognized university and this is a Diploma course, not graduation, so you can't.

The Linux open source operating system, or Linux OS, is a freely distributable, cross-platform operating system based on Unix that can be installed on PCs, laptops, netbooks, mobile and tablet devices, video game consoles, servers, supercomputers and more.
Basic Features:
1) Portable - Portability means software can works on different types of hardware in same way. Linux kernel and application programs support their installation on any kind of hardware platform.
2) Open Source - Linux source code is freely available and it is community based development project.

Hi,
You may contact Brainware, CMC or NIIT.

BCA undoubtedly is a better course, as DCA is only a diploma course and BCA is a full time UG course. Even the job opportunities and scope is far better for the BCA course.

I think you should go for Science because it has more options than commerce.

You can enroll in any nearby computer institute, which is affiliated by a government university. NIELIT also conducts online examination every month and gives a government recognized certificate for CCC course.