DBA_EXP_FILES describes export files.

Column Datatype NULL Description
EXP_VERSION NUMBER(3) NOT NULL Version number of the export session
EXP_TYPE VARCHAR2(11)   Type of export file: complete, cumulative, or incremental
FILE_NAME VARCHAR2(100) NOT NULL Name of the export file
USER_NAME VARCHAR2(30) NOT NULL Name of user who executed export
TIMESTAMP DATE NOT NULL Timestamp of the export session