E . True. Indexes can be created on global temporary tables just like they can on permanent tables. The indexes on global temporary tables are also temporary and only exist for the duration of the session or transaction, based on how the table was defined.
F . True. If the ON COMMIT clause is specified as DELETE ROWS, then all rows in the global temporary table are deleted after each COMMIT or ROLLBACK within the transaction. This clause defines the scope of the data's persistence within the global temporary table.