A client application creates an HDFS file named foo.txt with a replication factor of 3. Identify which best describes the file access rules in HDFS if the file has a single block that is stored on data nodes A, B and C?
A) The file will be marked as corrupted if data node B fails during the creation of the file.
B) Each data node locks the local file to prohibit concurrent readers and writers of the file.
C) Each data node stores a copy of the file in the local file system with the same name as the HDFS file.
D) The file can be accessed if at least one of the data nodes storing the file is available.

Question

Quizplus · Accepted Answer

HDFS is designed to be fault-tolerant, and a file can be accessed as long as at least one replica is available on any data node.

A Client Application Creates an HDFS File Named Foo