Whith three statements are true about built in data types?

The true statements about built-in data types in Oracle are:

B: A BFILE is a data type in Oracle that allows for a read-only link to binary files stored outside the

database in the operating system. This is correct as per Oracle's documentation.

D: The default length for a CHAR column, when not specified, is one character. This is according to

the Oracle SQL standard.

F: A BLOB is used for storing binary data within the Oracle database, allowing for storage of large

amounts of unstructured binary data.

The incorrect options are:

A: A VARCHAR2 column does not blank-pad values; it is CHAR that may blank-pad to the fixed length.

C: A CHAR column requires a length specification, although if omitted, the default is one character.

E: A VARCHAR2 column requires a length specification; without it, the statement will fail.

Reference:

Oracle Documentation on Data Types: Data Types

Oracle Documentation on LOBs: LOBs

Oracle Documentation on Character Data Types: Character Data Types