The TOEFL, or Test of English as a Foreign Language, is an exam administered by the Educational Testing Service (ETS).
The TOEFL is taken by people for whom English is not their first language. It is used to determine ones' understanding of the English language in its written and spoken forms in college and university settings and situations.
A lot of colleges and universities that are primarily English speaking will require the TOEFL test for non-native English speakers that are applying for admission to those universities. There are various formats of the TOEFL, depending on where one will be taking the test. These include the paper-based test (PBT) and the internet-based test (IBT).

The International English Language Testing System (IELTS) is a test of English language proficiency, developed by the University of Cambridge Local Examinations Syndicate. IELTS is now accepted as evidence of a prospective student’s level of English by most universities in English speaking countries.

There are two different IELTS tests that you can do: Academic and General.
If you are interested in studying at a university in an English speaking country you will need to take the academic version of IELTS.
• The Academic Module is intended for those wishing to enrol in universities and other institutions of higher education.
• The General Training Module is intended for those planning to undertake non-academic training or to gain work experience, or for immigration purposes.

The test has four sections:
1. Listening
2. Speaking - interview
3. Reading - different for Academic or General Training
4. Writing - different for Academic or General Training

The GRE or Graduate Record Exam is an exam produced and administered by the Educational Testing Service (ETS). This test required for admission to most U.S., Canadian, and UK graduate schools. Most students attend graduate business school for pursuing an Master degree. In addition, GRE can also be used for admission to PhD program.

There are two types of Graduate Record Examinations, the general exam and the subject tests. The general GRE test is often required for admission to graduate school, and the subject tests, which are only given in a few select subjects, can be either optional or required depending on the graduate program.

The Graduate Record Examination (GRE) is a multiple-choice exam designed to measure verbal, analytical, and quantitative skills.
The GRE General Test, required by most graduate schools, many vet schools, and various other allied health professional schools, is considered to be a good predictor of your success in a graduate program.
There are seven sections to the GRE General Test:
-Two Verbal Sections
-Two Quantitative Sections
-Two Analytical Sections
-One Experimental Section

GRE Subject Tests (in 17 specific areas, e.g. Psychology, Biology, Chemistry) are often required for graduate school (Ph.D.) admission, but not generally for health fields.

The Graduate Management Admission Test (GMAT) is a test that has been produced by the Graduate Management Admission Council (GMAC), and is used to help business schools in making admissions decisions.

The GMAT test is taken by students who are applying for admission to either MBA or other graduate management programs. The GMAT test is given in English only, and it tests analytical writing, quantitative, and verbal skills. In the United States, the GMAT test is a computer-based test.

The GMAT test consists of three sections.
- The first section of the test is the Analytical Writing Assessment (AWA). The AWA consists of two writing tasks. The first is an analysis of an issue, and the second task is the analysis of an argument. The Analytical Writing Assessment is always found at the beginning of the GMAT test, and test takers are given 30 minutes to complete each writing task.
- The second section of the GMAT test is the quantitative section. This section tests the knowledge of arithmetic, elementary algebra, and common geometry through questions on data sufficiency and problem solving. There are 37 multiple choice questions in this section, and test takers have a maximum of 75 minutes to complete these questions.
- The third section of the GMAT test is the verbal section. This section has 41 multiple choice questions, and the questions test reading comprehension, critical reasoning, and sentence correction. There is a maximum of 75 minutes to complete this section of the examination. In addition, there will be pretest questions mixed in to these sections of the exam. These questions will not be identified as pretest questions, so it is important to answer all questions as best as possible. Pretest questions are not scored. Examples of all of the types of questions that may be seen on the GMAT test can be found online at GMAC's website.

The MCAT stands for Medical College Admission Test. Unlike the GRE CAT, the MCAT lasts twice as long and covers a broader range of verbal, science, and writing components. Most medical schools assess your academic prowess from your transcript and your MCAT score; the MCAT indicates whether you possess a solid foundation to build a successful medical career.

The American Association of Medical Colleges (AAMC) indicates that the MCAT measures not only proficiency in the basic sciences, but also the more general problem-solving, critical thinking, and communication skills developed in humanities curricula. In the end, the MCAT sits among the top three selection factors for admissions officers surveyed by the Princeton Review.

Physics and Bio-Sciences are primary requirements for success on the Medical College Admission Test (MCAT), but the candidate for medical school must also be adept at critical thinking and problem solving. Along with those skills, a successful MCAT outcome depends upon the test taker’s ability to communicate effectively in writing. Nearly all medical schools in the United States require the MCAT.

The MCAT has a multiple-choice format that assesses knowledge of specific content, critical reasoning ability, logic, and reliable decision-making abilities.
An MCAT that is more than three years old is unacceptable for admission at most schools.

If you are applying for admission to pharmacy school, you'll need to take the Pharmacy College Admission Test (PCAT).
This national is used by schools to measure prospective students' aptitudes and abilities to handle the rigors of becoming a doctor of pharmacology.

The test multiple choice questions. It's broken down into five subject areas, plus an essay.

They are: Verbal Ability on analogies and sentence completion.
Biology items on general biology, microbiology, anatomy, and physiology.
Reading Comprehension questions measuring your ability to comprehend, analyze, and evaluate written material.
Quantitative Ability on algebra, geometry, probability, statistics, pre-calculus, and calculus.
Chemistry which is general and organic chemistry.