This is a good idea for QOD, unfortunately the QOD itself was ruined by a syntax error. The REPAIR_FAST argument cannot be used without a database name or ID.
http://msdn.microsoft.com/en-us/library/ms176064.aspx
DBCC CHECKDB (Transact-SQL)
Syntax
DBCC CHECKDB[
[ ( database_name | database_id | 0
[ , NOINDEX
| , { REPAIR_ALLOW_DATA_LOSS | REPAIR_FAST | REPAIR_REBUILD } ]
) ]
[ WITH
{
[ ALL_ERRORMSGS ]
...
}
]
]
When you try to run the command "DBCC CHECKDB , REPAIR_FAST", you get the following error: "Msg 102, Level 15, State 1, Line 1. Incorrect syntax near ','."
The correct syntax is something like "DBCC CHECKDB (AdventureWorks, REPAIR_FAST)" or "DBCC CHECKDB (5, REPAIR_FAST)".
And the correct answer to the QOD is "returns an error message - you have to specify a database".