How does a Block Scanner normally handle corrupted files?

When the Block Scanner detects any corrupted file or corrupted data block the DataNode sends a message to the NameNode.
After receiving a notification from DataNode, NameNode starts the process of, making a replica from corrupted block data.
-Replication factor is compared to the count of right replicas and the corrupted data block won’t be deleted if a match is detected.

BY Best Interview Question ON 14 Nov 2022