Exam NCA-7.5 Topic 1 Question 30 Discussion

UTC is the recommended timezone selection when creating a Linux VM on AHV. Nutanix specifically states that the real-time clock of a Linux VM must operate in UTC. Selecting the UTC timezone ensures that the guest's hardware-clock interpretation is consistent with Linux conventions and avoids time shifts caused by local timezone or daylight-saving changes.
Time consistency is essential for authentication, application logging, distributed databases, monitoring, certificate validation and event correlation. The guest operating system can still display a regional timezone to users at the application or operating-system level while maintaining its underlying hardware clock in UTC.
"Local" can cause the guest to interpret the virtual hardware clock according to a regional offset, producing incorrect timestamps after migration, reboot or daylight-saving transitions. "Cluster" is not a supported timezone designation for this VM setting. RTC means real-time clock and describes the clock mechanism rather than a selectable geographic timezone.
The VM should also use a reliable NTP source after deployment so its operating-system time remains synchronized.
NHCF/NCA reference: VM Management-creating and configuring Linux virtual machines; NCA Section 2,
"Describe VM tasks." Official references: Prism 7.5-Creating an AHV VM , Prism 7.5-Time- Synchronization Recommendations .