Digital Marketing

Kindly refer previous year questions papers of CAT and ensure that you cover all the topics. Ensure that you are solving or answering the questions within less time, because time plays an important role.

You can try for other MBA entrance exams. Or, if you can dedicate one more year for CAT preparation that's also a good option. If you want to get admission this year itself than you can look for college with good ROI, facilities/faculty members and decent placement results. Digital Marketing is no doubt a good specialization to pursue with great career opportunities ahead. But, it will be more favorable for you if you pursue it from a tier-1/tier-2 B-School. So, giving one more try for CAT is a better choice. Good Luck.

http://techbound.in/how-to-choose-a-best-digital-marketing-institute/
The best Institute for Digital Marketing is Tech Bound Digital Innovations & they offers training in various fields like SEO, SEM, SMO, SMM, Email Marketing, Pay Per Click, Content Management etc. For more details:-
http://www.techbound.in/digital-marketing-course-in-trivandrum/.

As per the internet research, the fee is somewhere close to INR. 1.5 Lacs. I request you to speak with the institute and counselors for detail.

There is no eligibility requirement for IELTS. It is just a language test that provides a score on the basis of your English speaking and understanding capabilities. This score is used by the universities abroad to determine your eligibility for their courses.