Hello Ajit,
Yes. This can be done. Have a look at this in the NCM guide
Unsolicited device configuration captures:
Network Configuration Manager attempts to capture device configurations immediately after any change occurs. An unsolicited notification of configuration change can be either traps or MIB objects that are sent from the device where the change occurred.
Some devices send SNMP traps when their configuration has changed. The SpectroSERVER then performs a capture and saves the configuration in the database to provide updated configuration data. Network Configuration Manager policies are tested against the most recent configuration captures.
HTH