The DBC file can be validated with the below mentioned command.

java oracle.apps.fnd.security.AdminAppServer appsusername/appspassword STATUS dbc=/path of dbc file with file name/

If the DBC file is correct then APPL_SERVER_STATUS should be valid.

OUTPUT
Database Server
---------------
DATABASE_ID:DEV
AUTHENTICATION: OFF

Application Server
------------------
APPL_SERVER_STATUS: VALID
APPL_SERVER_ID: C3099680DC6E9016E0430A51344A901627786863372082922692682207993341