App1 runs on two VMs (VM1 and VM2). You will place them in an Azure Availability Set and must keep App1 available during planned hardware maintenance. What should you include in the Availability Set?

To ensure App1 remains available during planned hardware maintenance, you need to include two update domains in the Availability Set. Update domains (UDs) are logical groups of underlying hardware that can be rebooted at the same time. By placing VM1 and VM2 in separate UDs, Azure ensures that only one VM is updated or rebooted at a time during planned maintenance, keeping App1 operational. One update domain would mean both VMs could be updated simultaneously, causing downtime. Fault domains (FDs) protect against unplanned hardware failures (like power or network outages) within a datacenter, not planned maintenance. While FDs are also part of an Availability Set, they don't directly address planned maintenance.