What is SUSPECT Mode database?

Hi All,
What is suspect mode in sql server and how it happens and how to recover from the suspect database ?\
Please post the article.
Thanks&Regards Siva G

SQL server marks database as suspect due to many reasons; some of them are given below:
Hardware failure
Improper shutdown of the database server
Corruption of the database files
Unavailable device files
Unavailable database files
Database resource used by operating system
SQL Server incorrectly asserts free data page space when a row is inserted 
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    As I know the database should be restored from backup and logs reapplied. That’s the first and generally recommended approach any time a DB is suspect, whether it’s from log or data file corruption.
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