Explanation:
PMON registers instance information with the listener. By default, PMON (a database background process) registers with the local listener (meaning: on the same server) at the default local address of TCP/IP, port 1521. Also PMON background process cleans up the failed connections. The process monitor performs process recovery when a user process fails. Incorrect Answer:
1: The system monitor process (SMON) is responsible for performing instance recovery after an instance failure. It also cleans up the temporary segments that are no longer useful. SMON coalesces the free extents allocated in a dictionary-managed table spaces.
3: Shared servers do not register instance information with the listener.
4: Dedicated servers do not register instance information with the listener.
Reference:
OCP Oracle 9i Database: Fundamentals II Exam Guide, Rama Velpuri, p. 174-175
Chapter 7: Instance and Media Recovery Structures

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