Citrix
1Y0-201 · Question #93
1Y0-201 Question #93: Real Exam Question with Answer & Explanation
The correct answer is C: By selecting 'Rollback machine update' for the Session Machine Catalog. In Citrix Virtual Apps and Desktops, the rollback of a machine image update is performed at the Machine Catalog level, not the Delivery Group level, because master image associations are managed within catalogs.
Question
Scenario: A Citrix Administrator updates all of the machines within a Delivery Group. After the update, an application stops working. The IT manager tells the administrator to revert all machines to the previous image. How should the administrator revert all machines to the previous image?
Options
- ABy selecting 'Rollback machine update' for the Delivery Group
- BBy deleting the snapshot associated with the template virtual machine
- CBy selecting 'Rollback machine update' for the Session Machine Catalog
- DBy deleting the difference disks of the virtual machines within the Delivery Group
Explanation
In Citrix Virtual Apps and Desktops, the rollback of a machine image update is performed at the Machine Catalog level, not the Delivery Group level, because master image associations are managed within catalogs.
Common mistakes.
- A. The 'Rollback machine update' option does not exist at the Delivery Group level - rollback is a Machine Catalog operation because image versioning is owned by the catalog.
- B. Deleting the snapshot associated with the template VM would destroy the rollback point rather than apply it, making recovery impossible.
- D. Deleting difference disks would corrupt or destroy machine state entirely and would not restore machines to a known-good previous image.
Concept tested. Citrix MCS machine image rollback via Machine Catalog
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