1. vCenter Server and ESXi hypervisor
2. (b) No. 
   VMware vSphere 6.5 U2 cannot be upgraded directly to 6.7 but you might upgrade do 6.7U1.
3. (b) Hardware Compatibility List.
4. Manual installation using ISO media, Automatic installation using kickstart files and Automatic installation using vCenter Server and Auto Deploy feature.
5. Remote device is a block device connected to ESXi server from the external storage array.
6. (a) Yes
   You can upgrade ESXi server through ISO installation media.
7. (b) False
   You need to run your own TFTP server.
8. (d) Performance Service Center
9. License costs, Ease of deployment, vCSA HA feature, Automatic backups, Enhanced Link-Mode, Direct installation on the new VSA cluster.
10. (b) False
    vCenter Server HA is available only for vCSA not the Windows version.