Hey @SugathithyanM thanks for the additional mention here, please see our conversation for reference. For any others also interested:

1. Yes, the certification voucher code is applicable on any Databricks Certification exam, including the Apache Spark Certification.

2. We cannot extend the validity of any coupons provided. However, we will be running an additional learning festival from October 10 to October 31 if you would like to complete an additional learning pathway to avail of a second voucher.