In general usage, “cloud-native” is an approach to building and running applications that exploits the advantages of the cloud computing delivery model. “Cloud-native” is about howapplications are created and deployed, not where. It implies that the apps live in the public cloud, as opposed to an on-premises datacenter.
Security in Spark is OFF by default. This could mean you are vulnerable to attack by default. Please see Spark Security before downloading and running Spark.