SAS Institute A00-251 Exam (page: 2)
SAS Institute Administering SAS Viya 3.5
Updated on: 07-Feb-2026

Explanation:

According to the official SAS Viya 3.5 documentation, the CLI command to restart the SAS Logon service is sas-admin service restart saslogon. You can find this information in the SAS Viya 3.5 Administering Guide page 22.

Explanation:

CAS can support multiple backup controllers in a distributed architecture, which can improve performance and provide redundancy. Additionally, a backup controller can be added after the initial deployment, which can be useful for managing a large number of CAS workers. It is false statement because CAS supports adding more than one backup controller in a CAS server architecture. The CAS Backup Controller is a separate process that runs alongside the CAS Controller and monitors the health of the CAS processes. It can be deployed on a separate machine or on the same machine as a CAS worker. The backup controller can be added during the initial deployment or after the initial deployment.
A CAS Backup controller is used in a distributed CAS server architecture but it can also be used in a single machine architecture too. CAS Backup controller provides an additional level of redundancy, in case the primary CAS controller goes down, it can take over its responsibilities.

Explanation:

When recovering a primary controller, you need to restore the permstore from the backup controller to the primary controller. The permstore contains the state of the CAS session and other important information related to the CAS environment, such as configuration, metadata, and user data. Restoring the permstore from the backup controller allows the primary controller to resume operation with minimal data loss.
The process of restoring the permstore from the backup controller to the primary controller can be done by using the sas-admin permstore-restore command.

Reference:

https://www.sas.com/en_us/support/documentation/viya-books/cas-admin/cas-admin- backup-and-recovery.html#zid-12719
It is important to note that, before restoring the permstore, you should stop SAS services on all the CAS workers, in order to avoid data corruption during the restore process. Also, it is not recommended to delete the permstore from the backup controller, as it is useful in case of primary controller failure. CASDISKCACHE is used for caching purpose, it's not related to permstore or primary controller failure.

Explanation:

Explanation:

SAS Mirror Manager is a tool that is used to download the most current Viya software from SAS and prepare the deployment mirror repository for an update. The SAS Mirror Manager is a command-line interface (CLI) tool that is used to create, manage and update deployment mirror repositories. It allows you to download software components from the SAS Software Depot and store them in a local repository. This enables you to perform updates and new installations of SAS Viya without requiring internet access.

Reference:

https://www.sas.com/en_us/support/documentation/viya-books/sas-viya-deployment- wizard/using-the-mirror-manager.html