Types of .dbc file

Generally, .dbc files are classified in 2 types with accordance of their parametric value for  fixed_size_dml which can be either true or false.
If the value is false, the database generates delimited types whenever possible(it recognizes null as zero-length string).
In case of true, it takes fixed length dml.
Other parameters for .dbc files are:
 

types of .dbc file mainly depends on connection from ETL server to multiple Databse like ..Oracle,DB2.Redbricks....  

First of all how did you come to know there are two types of DBC files.. Moreover all answers provided are incorrect!!

We don't have diff types of dbc file. We have only one dbc file which is used to connect the component in the GDE with particular database

.dbc file is database configuration file. In this file, information to connect the database is given.

Types of files:
1. Fixed length file
2. Delimited file