CompTIA Linux+ XK0-006 (V8) Practice Question

The correct command to scale a Docker Swarm service is docker service scale SERVICE_NAME=REPLICA_COUNT. In this case, docker service scale api-gateway=3 correctly targets the api-gateway service and sets the desired number of replicas to 3. The command docker service scale api-gateway 3 is incorrect because it is missing the required equals sign. The command docker service scale --replicas=3 api-gateway is incorrect as the --replicas flag is used with the docker service update command, not docker service scale. The docker swarm scale command is invalid as scaling is managed through the docker service subcommand.