European vs American schools

I also have same question can some one answer please

The short answer to your question is no, a one year program will not provide you the same level of education/experience as a two year program. That isn't to say that decent condensed programs don't exist, INSEAD is a great example and Columbia also has a condensed program.

I hate to be blunt, but, you cannot get all the experience in a one year program that you can get in a two year program. You will get roughly half.

If time is an issue, you may want to consider master's programs or attending school part-time (or doing an executive MBA if you have the experience). These are good alternatives that are designed for people with slightly different needs and priorities.

Lastly, any good school will try to help you implement the concepts that you learn in the classroom to real world situations - business schools know that you hope to take the knowledge and apply it. Internships are a great way to "test" this and to actually learn in the real world. If applying knowledge while at school is important to you (as it should be!) then a 2-year program with an internship between the first and second year would be ideal.

Hope this helps!