What is difference between these three classes [NSManagedObject, NSManagedObjectContext,
NSManagedObjectModel] of CoreData?

Here are the key differences between the three Core Data classes you mentioned:

NSManagedObject

• Represents a single entity instance in the Core Data store
• Provides methods to access and modify the properties of the entity
• Automatically handles the creation, updating, and deletion of objects in the context
• Provides a way to track changes made to the object

NSManagedObjectContext

• Represents a scratch pad for working with managed objects
• Acts as the central hub for all interactions with the persistent store coordinator
• Manages the lifecycle of managed objects, including creating, updating, and deleting them
• Provides a way to save changes to the persistent store
• A...