A Partial Backup is any operating system backup short of a full backup, taken while the database is open or shut down.
A full backup is an operating system backup of all data files, on-line redo log files and control file that constitute ORACLE database and the parameter.
Media recovery is a process to recover database from backup when physical disk failure occur.
Cash recovery is a automated process take care by oracle when instance failure occur.
In oracle db_recovery_file_dest specifies a default location of flash recovery area which contains multiplexed current control files, online redo logs as well as archived logs, Rman backups,flash back logs. db_recovery_file_dest_size should be specified as well.
To Enable Restricted Session
Alter system enable restricted session;
To Disable Restricted Session
Alter system disable restricted session;
To Start the Database in Restricted Mode
By starting Instance in restricted mode it will not allow all users to access and only users with restriction privilege will be allowed to access. This will be done time of make some data changes so that no users should be allowed to access data on time of changes happening