Assessment test

No it will not be applicable for you. As the cut off date mentioned in the notification is 31 March 2018. i.e. students completing their articleship in the quarter April - May - June will be tested in July - August - September. 

If you're a student whose articleship was completed before that then you're already out of the test time.

No you won't be required to give the exam as you're out of the cut off date mentioned in the announcement.