SAT is a multiple-choice questions answers, paper, and pencil test to get admission mainly to a US college for doing graduation but you can still take admission in other countries colleges also.

SAT stands for the Scholastic Assessment Test. The SAT test is totally organized by the Official College Board of the US. The SAT test contains two sections in it that are the Maths section and the EBRW section (Evidence-based reading and writing). The total marking score of the SAT test is 1600. the time duration of the SAT test is 3 hours. SAT test is taken 7 times a year. 

The fee for SAT exam is $55 + Non-US Regional Offices. A score of more than 1200 out of 1600 is considered an average score and a more than 1400 score is considered a very excellent score.

SAT exams don't have particular eligibility criteria for the students but still, it is advised to take SAT while you are in class 11th or 12th.