Which two statements are true about applying updates on Exadata systems?

Failed storage server updates are automatically rolled back to a previous release.

To speed up applying storage server updates in a rolling manner, updating two storage servers simultaneously is recommended.

Updating kernel and RDMA packages on storage cells should be prevented by excluding them with the yum —exclude option.

For regular Exadata updates, yum automatically installs a non-UEK kernel, which can be selected to boot from grub.

Failed database server updates are rolled back to a working state on a previous release automatically.

When running a "yum update" for a new Exadata release, all other repositories should be disabled.