GMAT

It stands for Graduate Management Admission Test.

It is Administered by Graduate Management Admission Council.

GMAT is preferred for the candidates who wish to take admission into MBA program.

GMAT score is valid generally for 5 years.

SAT:

SAT stands for Scholastic Assessment Test.

SAT: Reasoning Test

It is owned and published by College Board and Administered by ETS.

TOEFL iBT

It stands for Test of English as a Foreign Language.

Administered by Educational Testing Service.

It is required for the students applying to universities in America and Canada to check their command over English language.

IELTS

It stands for International English Language Testing System.

It is owned and managed by IELTS Australia, The British Council and The University of Cambridge- ESOL

It checks the expertise over English language.

Skills covered are Listening, Reading, Writing and Speaking.