Does the Layer 3 switch isolate the broadcast domain?

Whether the Layer 3 switch isolates the broadcast domain.
If the interface has a vlan if, then the different network segments are isolated from the postgraduate entrance examination, because after the gateway, the routing table is checked, and there is no destination entry, then the broadcast domain is discarded and isolated.
If there is no ubm message forwarded by the gateway, it will still be broadcast and flooded.