Which statement is true about upgrading from VMware vSphere 6.5 to 7.0 regarding VMFS datastores?

The statement that an ESXi 7.0 host will automatically upgrade VMFS3 datastores is correct. When you upgrade to ESXi 7.0, the upgrade process will seamlessly transition VMFS3 datastores to VMFS6 format, which is the supported version in ESXi 7.0. This automatic upgrade occurs without requiring manual intervention, allowing the system to leverage the enhancements and features available in VMFS6, such as improved performance and increased flexibility.

It's essential to note that while VMFS5 cannot be upgraded, VMFS3 is indeed not supported in ESXi 7.0. The automatic upgrade mechanism is a significant benefit, ensuring that the datastores are current and functional within the new environment. It simplifies the upgrade process and minimizes downtime, making it easier for administrators to manage resources effectively during transitions to newer versions of vSphere.

While the choice indicates that a new VMFS6 datastore is necessary for upgrades, it is important to clarify that existing VMFS3 datastores are automatically upgraded, ensuring business continuity without the immediate need for creating new datastores.