Why do I get an open transaction when just selecting from a database View?

Question

If I execute a simple select statement in pl/sql developer against a database table, I get a standard set of results back as I would expect.

Recently, I pasted a que

Answer 1

Select is a part of DML only but lock is not acquired, A row lock is fetched upon insert/update/delete/ select for update. -Ross is right.

https://docs.oracle.com/cd/E11882_01/server.112/e41084/ap_locks001.htm#SQLRF55502

                        ROW Lock    Table lock

SELECT ... FROM table... ----- None

INSERT INTO table ... Yes SX

Same with update delete and select for update.