NO.

Yes We Can Do

yes. itab like mara. like this we way we create table 
with out using domain and data element

Yes we can create. While defining data element below domain 
there is a field called BUILT IN TYPE. Use this option.

Yes we can do. while creaing a table new field, we can 
chose predefined data type instead of Data element.

yes we can create at the time of creating  a table after 
finishnig field press built-in-type  directly u can assign 
data type , lenth and description  for each field .like 
that we can create field with out domain and data element .
we never create a filed like that because table to table 
relation ship is not possible.

yes we can create data object not data element so this way
we can do.