For situations where the transaction would complete by committing the updates:
A . When the session logs out successfully: When a user session logs out, Oracle automatically commits any outstanding transactions.
C . When a CREATE INDEX statement is executed successfully in the same session: Most DDL statements, including CREATE INDEX, cause an implicit commit before and after they are executed.
F . When a DBA issues a successful SHUTDOWN TRANSACTIONAL statement: This type of shutdown ensures that active transactions are either committed or rolled back. If a COMMIT is then issued explicitly, it would be redundant but emphasizes the transaction completion.
Incorrect options:
B: SHUTDOWN IMMEDIATE will roll back transactions, not commit them.
D: A COMMIT in one session cannot affect the transaction state of another session; each session is isolated in terms of transaction management.
E: If a CREATE TABLE AS SELECT statement executes unsuccessfully, no implicit commit is performed; the statement failure means the transaction state remains unchanged.