Because the test assesses your potential ability, not any set of current knowledge, you cannot study for the exam. Some language aptitude tests, such as the Modern Language Aptitude Test, are what are called "secured tests." Copying questions or testing materials is strictly prohibited, lest the test questions and answers leak, so the tests are only sold to professionals and organizations that can be trusted to keep the test secure. Individuals can, however, find out the format of the test so they know what to expect and see some sample questions.
Traditionally, aptitude tests have been administered as pencil and paper tests. Students had an answer shee, on which they would mark their answers for the written questions and the auditory questions. However, recent developments have led to some aptitude tests being available in a computerized format. Instead of marking answers on an answer sheet, students select answers on the computer. This answer format is useful for professionals who administer large volumes of exams because the computer scores the individual instantly.
Language aptitude tests access an individual's ability to acquire a new language by investigating his ability to discern the meaning of simple languages that were invented specifically for the test. Test takers will be given phrases in the invented language, then its translation into the test taker's language. The test taker will then answer questions about the invented language's vocabulary, grammar and syntax. Other questions will have test takers answer questions that asses their ability to discern patterns.
The ability to learn a language is not immutable in individuals. As people learn, grow and age, their ability to learn a language will alter as well. This ability can either increase or decrease with time. Consequently, the score of an individual's answers is only valid for a finite amount of time. Often, score are only valid for two years. After this, an individual would have to sit the test and answer questions again for a valid score.