Are cloud storages insurance against infection by encoders (ransomware)?

Question

Information Security

Suppose there is a folder whose files are synchronized with the cloud (dropbox, skydrive, googledrive, etc.). The machine is infected with ransomware and the files in this folder are encrypted and turned into %filename%.vault. What will be in the cloud after synchronization: only the encrypted file or the original and encrypted. After all, if you delete a local file, then it is deleted from the cloud.

Answer 1

If the cloud keeps file revisions, then it is. It will be possible to roll back the infected file to the previous revision.

Answer 2

Synchronized. The files will also change

Answer 3

Paid Dropbox - yes, files are versioned there.