Which two statements are true about initialization parameter files? (Choose two.)
A lost or damaged SPFILE can be re-created by using the parameter values listed in the alert log.
A PFILE must exist for an SPFILE to be created.
The ALTER SYSTEM command cannot be used to change the value of any parameter if a database
instance has started using a PFILE.
Both the SPFILE and PFILE must always reside on a file system accessible from the database host server.
On startup, by default a database instance always first searches for an SPFILE, and if it does not find any,
searches for a PFILE.