Explanation:
DISPATCHERS and SHARED_SERVERS are required initialization parameters in an Oracle Shared Server environment. DISPATCHERS parameter is used to configure dispatcher processes in the shared server architecture. SHARED_SERVERS specifies the number of shared server processes created when an instance is started up. Incorrect Answer:
2: MAX_DISPATCHERS parameter specifies the maximum number of dispatcher processes that can run simultaneously. It’s optional parameter.
3: MAX_SHARED_SERVERS parameter specifies the maximum number of shared server processes that can run simultaneously.
4: SHARED_SERVER_SESSIONS parameter is used to specify the total number of shared server user sessions to allow. Setting this parameter enables you to reserve user sessions for dedicated servers.
Reference:
OCP Oracle 9i Database: Fundamentals II Exam Guide, Rama Velpuri, p. 100-102
Chapter 5: Usage and Configuration of the Oracle Shared Server

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