Final Answer:
The default mode for the CREATE VIEW command is NO FORCE.This means that the view creation will fail if the underlying tables or columns referenced in the view do not exist at the time of the command.Thus the option 2) NO FORCE is correct.
Step-by-step explanation:
When using the CREATE VIEW command in a database management system, the default behavior is to operate in "NO FORCE" mode. In this mode, the view creation process is strict, and it checks whether the underlying tables and columns referenced in the view definition exist. If any referenced table or column is missing, the view creation will fail, ensuring that the view is based on existing and valid database objects.
On the other hand, the "FORCE" option allows the creation of a view even if the underlying tables or columns do not exist at the time of the CREATE VIEW command. This can be useful in certain scenarios, such as when the underlying objects are expected to be created later. However, it introduces the risk of creating a view that may become invalid if the referenced objects are not created as anticipated.
Understanding the default behavior of the CREATE VIEW command is essential for database administrators and developers to ensure the integrity and reliability of views within the database. It aligns with the principle of maintaining consistency and validity in the database structure, preventing the creation of views that might later become problematic due to missing dependencies.
Thus the option 2) NO FORCE is correct.