i think A, C and F
D is wrong
Ref: https://docs.oracle.com/cd/B28359_01/server.111/b28310/manproc001.htm#ADMIN11168
An ***idle shared server process picks up*** the virtual circuit from the common queue
Here's an analysis of each statement:
A. writing inbound request to the common request queue from all shared server connections
True. Dispatchers are responsible for receiving client requests and placing them onto a common request queue that is serviced by the shared server processes. This central queue is key to the shared server model.
B. checking for outbound shared server responses on the common outbound response queue
True. Dispatchers also monitor a common response queue where shared server processes place their results. Once a response is available, the dispatcher retrieves it to send back to the originating client.
C. receiving inbound requests from processes using shared server connections
True. This is the primary role of a dispatcher. It's the first point of contact for clients connecting via the shared server architecture.
see https://docs.oracle.com/en/database/oracle/oracle-database/19/admin/managing-processes.html#GUID-A522BFBF-5452-4038-92DB-C5116A0B1B50
A - TRUE; All dispatchers are required to write incoming requests to a common response queue, which the (idle) shared server processes will monitor and pick up.
B - FALSE; Each dispatcher has its own response queue.
C - TRUE; This is the main purpose of dispatchers in a shared server architecture.
D - FALSE; Connection input requests are handled by the listener and, shared server processes do not have their own input queues, they monitor the common input queue.
E - FALSE; Shared server responses cannot be broadcasted to all connections.
F - TRUE; Shared server responses must be sent back to the requester on its own connection.
Here's an analysis of each statement:
A. writing inbound request to the common request queue from all shared server connections
True. Dispatchers are responsible for receiving client requests and placing them onto a common request queue that is serviced by the shared server processes. This central queue is key to the shared server model.
B. checking for outbound shared server responses on the common outbound response queue
True. Dispatchers also monitor a common response queue where shared server processes place their results. Once a response is available, the dispatcher retrieves it to send back to the originating client.
C. receiving inbound requests from processes using shared server connections
True. This is the primary role of a dispatcher. It's the first point of contact for clients connecting via the shared server architecture.
C,D,F
In a shared server configuration, dispatchers are responsible for managing incoming requests and outgoing responses. When a user connects to the database using a shared server configuration, the dispatcher receives the user's request and places it in the common request queue. The dispatcher then selects an available shared server and assigns the request to it by placing it in the appropriate shared server input queue.
The shared server then processes the request and generates a response, which is placed in the appropriate outbound response queue. The dispatcher checks for outbound shared server responses on the common outbound response queue and sends the response back to the requester on the appropriate connection.
A is correct. All dispatchers are required to write incoming requests to a common response queue, which the (idle) shared server processes will monitor and pick up.
B is wrong. Each dispatcher has it's own response queue.
C is correct. This is the main purpose of dispatchers in a shared server architecture.
D is wrong. Connection input requests are handled by the listener and, shared server processes do not have their own input queues, they monitor the common input queue.
E is wrong. Shared server responses cannot be broadcasted to all connections.
F is correct. Shared server responses must be sent back to the requester on it's own connection.
Reference:
https://docs.oracle.com/en/database/oracle/oracle-database/19/cncpt/application-and-networking-architecture.html#GUID-EC8F8778-02B7-4CF9-9E6F-A5D88C777235
I think C, D, F, only because of the wording. "A" states " common request queue FROM all shared server connections". The dispatches send requests TO shared server connections. The send responses FROM the shared server connections.
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