@Gayathri Devi
Could you try with below query as we are reading 2018-02-27T02:00 value and converting as timestamp value.
Query:-
hive> select from_unixtime(unix_timestamp('2018-02-27T02:00',"yyyy-MM-dd'T'hh:mm"),'yyyy-MM-dd hh:mm:ss');
+----------------------+--+
| _c0 |
+----------------------+--+
| 2018-02-27 02:00:00 |
+----------------------+--+
(or)
By using regexp_replace function we can replace T in your timestamp value
hive> select regexp_replace('2018-02-27T02:00','T',' ');
+-------------------+--+
| _c0 |
+-------------------+--+
| 2018-02-27 02:00 |
+-------------------+--+
And use concat function to add missing :00 value to make above value as hive timestamp.
hive> select concat(regexp_replace('2018-02-27T02:00','T',' '),":00");
+----------------------+--+
| _c0 |
+----------------------+--+
| 2018-02-27 02:00:00 |
+----------------------+--+