USA

As of my knowledge, gap of one year is not at all a problem but, the gap Certificate might be necessary to show the appropriate reason for gap in the academic years and then after get an admission for Masters in universities of USA with that graduation Certificate. Along with the gap Certificate.

Yes, You can apply. Just get the mark sheet again from the board (eg-CBSE). Documents necessary for applying for MS in the USA :
* 10th MARKSHEET
*12th MAERKESHEET
*UNDERGRADUATE COURSE DEGREE
*LETTER OF RECOMMENDATION (2-3)
*STATEMENT OF PURPOSE
* CV
* LANGUAGE EXAM TEST RESULT (IELTS/TOEFL). .

Top 5 Best colleges in MS at USA :
1) Massachusetts Institute of Technology (MIT) Cambridge, United States.
2) Stanford University Stanford, United States.
3)Harvard University Cambridge, United States
4) California Institute of Technology (Caltech) Pasadena, United States.
5) Massachusetts Institute of Technology (MIT) Cambridge, United States.

Refer the colleges:
University of South Dakota.Cameron University.
Southeast Missouri State University.
Central Michigan University.Worcester State University.
Minnesota State University.
Lehman College.
San Francisco State University.

There are various prestigious universities to pursue MBA in the IT field in the USA. Some of them are as below
1 Harvard university
2 Stanford university
3 the university of Chicago
4 university of Pennsylvania
5 Massachusetts institute of technologyThere are some of also best universities in Canada for MBA. Such as -
1 Rotman school of management2 Sauder school of business 3 Desautels faculty of management
4 Alberta school of business 5 The Montreal.

Sorry there aren't any as the living expenses for international students are INR 8.29 L annually and the average tuition fees for BBA is INR 22.76 L annually.

https://studyabroad.shiksha.com/usa/universities/arizona-state-university/fast-track-mba
You will find all the true and authentic information about your college here.