Hey there

You have not mentioned any exam name but for all those exams like jee whose exam dates are announced can be postponed as per the situation of pandemic. The situation around the world is very critical and exams of national level the virus can easily spread. Though the government is trying to conduct the exams with extream care.

Good luck

Hii!
Sorry, but you forgot to mention or tag the name of the examination you are talking about in the question. Kindly restructure your question and ask again including the necessary details.
If it's about NEET UG or Jee Mains, then there are almost negligible chances for the exam to get postponed.
NEET UG is on 26 July, 2020
JEE Mains between 18 - 23 July, 2020
Hope you understand.
Good luck!