I have scheduled my App builder exam on 29th November 7:45 AM IST, while writing my exam it got stuck in middle and could not go forward. I requested help from the support members and he rescheduled my exam to 6:30 PM IST. When i launched exam at 6:30 PM IST i was able to answer only one question and again it stuck. Later i took help from kryterion member and launced exam again and this time it dint take me to the questions also. i faced camera issues and some times photo enrollment was not able to retrieve and the exam was suspended. I have raised case to sales force. Any thing else i could do to reschedule my exam asap.
As per the Salesforce exam policy Kryterion support can schedule exam exam for the same day only so if they are not able to schedule now you need to open a case from certification.salesforce.com. Salesforce support team will issue a new coupon code which you can use to re schedule your exam. The whole process will take 3-4 days