is Undelete Operation is count as DML

hi shubham,

Yes, Undelete is count as DML Operation.

you can refer following link for DML operation-

https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/apex_dml_section.htm

Hi,

Below are the Apex DML Statements supported by salesforce  :

1. Insert Statement
2.  Update Statement
3. Upsert Statement
4. Delete Statement
5. Undelete Statement
6. Merge Statement

Undelete Statement
The undelete DML operation restores one or more existing sObject records, such as individual accounts or contacts, from your organization’s Recycle Bin. undelete is analogous to the UNDELETE statement in SQL.

Hope this helps!