What is the total duration of CS course?

This question is quite ambiguous one as the duration of the course can vary depending on the number of attempts one takes to clear all the exams. There's a gap of 9months, effectively 12 when it comes to giving exams . So it requires 3years to clear all the exams (assuming cleared in first attempt

If you clear all the levels in one attempt then it should take 3 years for you to complete excluding the training required for CS.