Which two updates occur when a client application opens a stream to begin a file write on a cluster
running MapReduce v1 (MRv1)?

A.
Once the write stream closes on the DataNode, the DataNode immediately initiates a black
report to the NameNode.

B.
The change is written to the NameNode disk.

C.
The metadata in the RAM on the NameNode is flushed to disk.

D.
The metadata in RAM on the NameNode is flushed disk.

E.
The metadata in RAM on the NameNode is updated.

F.
The change is written to the edits file.

Explanation: