Certification

Since you are pursuing MBA in HR, I think Harvard has certifications in same area which will definitely add value, but I am not sure whether you will have direct access to it. Moreover, I would suggest you to try for PGM certification in XLRI as it would have a lot of weightage in your resume.

Without certification, you may face challenges in getting a job. You are advised to appear for CCNA examination immediately to get benefits of certification in search of a job.

It depends upon you what you want to achieve in the long run. MBA in finance in long run will have a positive impact in your career. Certificate course may help you in short run.

No, there are no free online tests for ISO certification.

You can go for the plethora of courses in the finance field like CFA and FRM. For marketing, you can go with digital marketing, business analytics and artificial intelligence.
For more details, visit sites like Udemy, Swayam, Simplilearn.

Web design is the art of creating presentations (using HTML, DHTML etc) that is delivered to an end-user through the World Wide Web, using a Web browser. There are many institutes in India which offers Web designing courses. To know about these you may refer to the following link:
http://tinyurl.com/yjs7q7s

If you want a good career in the aviation field then you have to pursue either Diploma or degree course in aviation which will help you in getting a good salary and career opportunity in this sector. The jobs are very less in this sector, so you have to work hard to get a good job in the airlines.