@Kanak_Lata_Singh
Apologies for the delay! I have answered your questions below:

1 . After purchase , can i write the exam any time i am ready or any expiry date is there ? Once you purchase the exam, you can take at anytime. The exam will not expire once purchased.

2 . If during exam , I face any issues , who shall i contact ?
You will be connected to a proctor during your exam. If you run into any issues during the exam, please ask your proctor for help.

We also recommend running a systems check prior to taking your exam. Please review Examity’s test-taker resources for more information on what to expect when you take your exam.

I hope this helps. Good luck on your exam and let us know if you have any further questions!