You try this way
CREATE TABLE TEST02
AS
SELECT COL1 AS COL3
, CAST(COL2 AS VARCHAR2(20)) AS COL4
, CAST(NULL AS DATE) AS COL5
FROM TEST01;
Note: I assumed the new column to hold NULL values. COL1 and COL2 is already present in Table 1 and copied into Table 2 as COL3 and COL4 where as COL5 is newly created