Examine the structure of the sales table, which is stored in a locally managed tablespace with Automatic Segment Space Management (ASSM) enabled. You want to perform online segment shrink to reclaim f

Online segment shrink physically moves rows toward the beginning of the segment and then resets the high water mark; because row addresses (rowids) change during this process, Oracle requires row movement to be explicitly enabled via ALTER TABLE ... ENABLE ROW MOVEMENT before the operation can proceed.

Referential integrity constraints do not need to be disabled because segment shrink moves rows within the same table without altering the data values that foreign keys reference.

Online segment shrink is specifically designed to run concurrently with queries and DML; the table does not need to be idle.

Segment shrink reclaims and reuses space within the existing segment rather than creating a copy, so no additional free space equal to the segment size is required.

Pending transactions are not a blocking prerequisite; the online shrink operation handles row-level concurrency internally and does not require a transaction-free table.