Hi Rajesh,
Thanks for your post. With regards to attending an MBA full-time, typically students who work full-time attend business school part-time. An MBA curriculum will be rigorous and it is difficult to both work and attend school full-time.
With regards to your application to Wharton, Columbia, and NYU, in addition to what you have written, your acceptance will depend on your GMAT score, letters of recommendation, essays, and how you present yourself as a candidate. Right now you should focus on studying for the GMAT and considering how you want an MBA admissions team to see you as an applicant; what key messages do you want them to be left with after reading your application?
I hope this was of help. Please let me know if I can answer any other questions.
Conrad and the
Stacy Blackman Team