Exam AZ-720 topic 2 question 31 discussion

B. The zone contains only name server delegation records. E. The zone is empty. Azure DNS health issues might occur due to several reasons. In this case, the DNS zone being marked as "degraded" suggests an issue with the configuration. Here are the two options that could potentially cause this issue: B. The zone contains only name server delegation records. This suggests that the DNS zone is not hosting any actual records for the domain itself, but is merely delegating to other DNS servers. A DNS zone with only NS records might not be serving its intended purpose, leading Azure to mark it as "degraded." E. The zone is empty. This means that the DNS zone does not contain any DNS records, including essential ones like A, AAAA, CNAME, MX, or even NS records. An empty DNS zone serves no practical function and would also be marked as "degraded" by Azure. Please note that the presence of A records, MX records, or glue records (Options A, C, and D) should not cause a DNS zone to be marked as "degraded." In fact, these types of records are typically necessary for a properly functioning DNS zone.

C and E can't be the answer for sure. B we cannot know that (no context) Therefore, A and D could be true in this scenario. https://learn.microsoft.com/en-us/azure/dns/dns-troubleshoot