Just a day ago, while discussing some SQL issues with one of the Sr. Database Administrator in India, we end up discussing DBCC as Database Console Commands when used as T-SQL. We both tried to remember what are the types of DBCC as Database Console Commands and could not come up with more than two types, however we both knew there are four.
When the conversation was over, I looked up MSDN for the types of the DBCC. I found following documentation here. There are four types of the Database Console Commands.
Maintenance tasks on a database, index, or filegroup.
Miscellaneous tasks such as enabling trace flags or removing a DLL from memory.
Tasks that gather and display various types of information.
Validation operations on a database, table, index, catalog, filegroup, or allocation of database pages.
DBCC dllname (FREE)