Explanation:
Oracle Net Configuration Assistant includes Listener configuration, Naming methods configuration, Local Net Service configuration and Directory usage configuration. Incorrect Answer:
2: Oracle Net Configuration Assistant is not used for hostname adaptor configuration.
3: It does not include TCP/IP host file configuration.
4: Connection Manager is not configured with Oracle Net Configuration Assistant.
5: Oracle Net Configuration Assistant is not used for connecting pooling configuration.
6: Oracle Net Configuration Assistant is not used for external procedures configuration: Oracle Net Manager is more helpful for this task.
Reference:
OCP Oracle 9i Database: Fundamentals II Exam Guide, Rama Velpuri, p. 89-92
Chapter 4: Basic Oracle Net Services Client-Side Configuration

---