Explanation
Which command is used to obtain the configuration lock in Gaia? The command that is used to obtain the configuration lock in Gaia is lock database override. This command allows a user to take over the configuration lock from another user who is currently logged in with read/write access. The other user will be forced to logout and will lose any unsaved changes. This command should be used with caution and only when necessary. References: Gaia Administration Guide R81, page 15.

https://sc1.checkpoint.com/documents/R81/WebAdminGuides/EN/CP_R81_Installation_and_Upgrade_Guide/Topics-IUG/Planning-Cluster-Upgrade.htm?tocpath=Upgrade%20of%20Security%20Gateways%20and%20Clusters%7CUpgrading%20ClusterXL%252C%20VSX%20Cluster%252C%20or%20VRRP%20Cluster%7C_____1

Explanation
In the Network policy layer, the default action for the Implied last rule is drop all traffic. However, in the Application Control policy layer, the default action is accept all traffic. The Implied last rule is a rule that is automatically added at the end of each policy layer and defines what to do with traffic that does not match any of the user-defined rules. The default actions for each policy layer can be changed in the Global Properties or in the layer properties. References: R81 Security Management Administration Guide, page 30.