Hi MD,
When you call 'create' API,the BigBlueButton server will create a room in memory. The room is not active until the first person joins the meeting.
If you call 'create' and more than 5 minutes (roughly) passes without any user joining, the server will delete the room from memory.
When using the BigBlueButton API, the recommend approach is don't call create until the first person is ready to join. For more details, see this earlier thread
If you have more developer related questions, please post follow-in questions to bigbluebutton-dev mailing list. See
Regards,... Fred
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BigBlueButton Developer
BigBlueButton on twitter: @bigbluebutton