What is the main function of Oplog?

A customers current AHV cluster for mixed server workloads consists of 7 NX-3060-G6 nodes with Intel Skylake processors spread across two blocks. Growing demand for resources requires the customer to order three additional NX-3060 G7 nodes with Intel Cascade Lake processors.
Which supported approach allows the customer the most efficient use of their additional resources?

A prospect facing an upcoming Vmware ELA renewal has a management directive to move to the public cloud due to perceived cost savings. Their virtualization team is currently struggling with refactoring applications for AWS. As a result, the virtualization team is pushing to evaluate VXRail and renew their VMware ELA.
Which two aspects of Nutanix shoud the SE Highlight? (Choose two)

A Nutanix customer needs to migrate 1000VMs from ACME Public Cloud to a local Nutanix cluster ACME Public Cloud operates on VMware ESXi, Hp ProLiant Servers with 3PAR storage. ACME Public Cloud denies customers access to vCenter or ESXi hosts But they do replicate a copy of the virtual disks to external storage.
Which method should the customer use to migrate the VMs to a local Nutanix Cluster?

Refer to the exhibit.
Using the Sizing Options shown, which two configurations are valid when using Sizer in Automatic mode?(Choose two.)