DROP TABLE always removes any indexes, rules, triggers, and constraints that exist for the target table. However, to drop a table that is referenced by a view or a foreign-key constraint of another table, CASCADE must be specified.

Are constraints dropped when table is dropped?

When a table is dropped, rules or defaults on the table lose their binding, and any constraints or triggers associated with the table are automatically dropped.

Does dropping table drop constraint Oracle?

Nothing remains. It's different when other objects reference the table.