Basically every student gets to select 8 courses for application to IPTA, and hence, they will go from your first choice onwards. Each course will have its own cut-off, so if your first choice don't meet the cut-off, they will consider your second choice, and so on.
So, if you put all your 8 choices for courses with cut-off at 4.00, whereas you have CGPA of 3.99, you are not going to get any course assigned and computer will randomly select whatever course that remains after everyone selects.
So, it is essential that you select with great care.
First, let say your CGPA is 3.25 . You have to major in a certain field, say Major A. Major A in Uni I has a cut-off of 3.4, and you put that as your first choice, so you are below the cut-off, you do not get that first choice. Then, they will look at your 2nd choice, and your second choice is a course with cut-off of 3.2 . You beat the cut-off and hence, you get selected!
So, ideally plan your 8 choices well. And as the cut-off points fluctuate, you can strategize.
Say you put your first two choices on the courses that you really want. Say your CGPA is 3.25 and these two courses that you really want has a cut-off of 3.45 last year. You can still put those two choices in to try out.
But it is essential then to put your next few choices (perhaps 3-4 choices) for courses with cut-off around what you have gotten. So, pretty much say your CGPA is 3.25, put those courses that have cut-off between 3.10(or anything lower) to 3.30/3.35. So, you would get to choose those courses that you are interested in too.
And then, this is essential, choose 1 to 3, ideally at least 2, unless your CGPA is like 4.00, then perhaps 1 should be sufficient of those courses that its cut-off is much lower than what you have. Say you have CGPA of 3.25, try to have one course with cut-off less than 3.00 and another one below 2.75 or even below 2.5 . This ensures that you will at least get some course that you have some interest in.
This post is posted based on what I believe is correct. If there is anyone out there, who finds out any mistake, please kindly point it out.
And please pass on the cut-off points table for each course for each IPTA to as many of your friends who need it, as that is crucial for entry into IPTA.