faq: update br faq for restore

faq/backup-and-restore-faq.md

@@ -327,3 +327,11 @@ If you do not execute `ANALYZE` on the table, TiDB will fail to select the optim
 ### Does BR back up the `SHARD_ROW_ID_BITS` and `PRE_SPLIT_REGIONS` information of a table? Does the restored table have multiple Regions?
 
 Yes. BR backs up the [`SHARD_ROW_ID_BITS` and `PRE_SPLIT_REGIONS`](/sql-statements/sql-statement-split-region.md#pre_split_regions) information of a table. The data of the restored table is also split into multiple Regions.
+
+## If the recovery process is interrupted, is it necessary to delete the already recovered data and start the recovery again?
+
+No need to do that. From v7.1.0, BR supports resuming data from a breakpoint. If the recovery is interrupted due to unexpected circumstances, simply restart the recovery task, and it will resume from where it left off.
+
+## After the recovery is complete, is it possible to delete a specific table and then recover it again?
+
+After deleting a specific table, it is possible to recover it again. But remember, you can only use either the `DROP TABLE` or `TRUNCATE TABLE` statement, not the `DELETE FROM` statement. This is because `DELETE FROM` only updates the MVCC version to mark the data to be deleted, and these data are only truly removed after GC.