Is there a alternative or analog of ParseObject.deleteAll and ParseObject.saveAll???

Android
1

We can do bulk remove/save operation?

2

You can do bulk updates using REST (search for “bulk update”):

https://backendless.com/documentation/data/rest/data_updating_data_objects.htm

Same applies to deletion (search for “bulk delete”):
https://backendless.com/documentation/data/rest/data_deleting_data_objects.htm