What Is Namespace In Apex?
In JAVA, we have got packages. Packages are nothing but folders in which we keep the resource files, class files, and executed files. So, in Salesforce we’ve got Namespace.
In a single namespace, we can have multiple classes with different names, functionalities, and resources. But in the same namespace, we cannot have two classes with the same name.
And every Salesforce Org. has got its own namespace.
Check out this video to learn more about Namespace.