Snowflake automatically rotates encryption keys when they are more than 30 days old. Active keys are retired, and new keys are created. This process is part of Snowflake's comprehensive security measures to ensure data protection and is managed entirely by the Snowflake service without requiring user intervention.
References:
Understanding Encryption Key Management in Snowflake

The ORGADMIN role in Snowflake is designed to manage organization-level activities. This role can perform several tasks that span across multiple accounts within the organization.
View Usage Information: The ORGADMIN role can view usage statistics and billing information for all accounts within the organization.
-- Example: Viewing usage information
SELECT *
FROM organization_usage_history;
Enable Database Replication: The ORGADMIN role has the authority to enable and manage database replication for accounts within the organization.
-- Example: Enabling database replication
ALTER DATABASE my_database ENABLE REPLICATION TO ACCOUNT other_account; References:
Snowflake Documentation: Organization Administration
Snowflake Documentation: Replication

In Snowflake, theownership privilegefor a schema includes:
Automatic granting to the creator's role: The role that creates a database object within the schema automatically receives ownership of that object.
Ability to manage grants: Ownership enables the role to manage permissions and grants on the schema and its objects, allowing them to control access at the schema level.
Ownership does not directly confer query privileges or the ability to alter warehouse settings, nor is it transferable without specific privilege management actions.

In Snowflake, overloading refers to the creation of multiple User-Defined Functions (UDFs) with the same name but differing in the number or types of their arguments. This feature allows for more flexible function usage, as Snowflake can differentiate between functions based on the context of their invocation, such as the types or the number of arguments passed. Overloading helps to create more adaptable and readable code, as the same function name can be used for similar operations on different types of data.
References:
Snowflake Documentation: User-Defined Functions