How to Identify the RAC database?

How to identify the RAC database?
Once we connect to RAC cluster how DBA can identify whether the database is RAC or standalone?
- There are many ways to identify
1. ps -ef|grep smon
2. using srvctl commands
srvctl config database -d DEVDB
srvctl status database -d DEVDB
3. show parameter cluster_database
4. using gv$ views
SELECT inst_id, dbid, name FROM gv$database
select INST_ID,INSTANCE_NAME,HOST_NAME from gv$instance;
5. using crsctl commands
crsctl stat res -t
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Regards,
Mallikarjun / Vismo Technologies
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[@jayalalitha5336]

Thank you

[@ratanwaghmare341]

Good morning sir