A team is building an EMR Cluster in AWS. One of the major requirements is to ensure that data is available even after the EMR cluster is torn down. Which of the following storage option should be used to fulfil this requirement?

Answer options:

A.HDFS using Instance store
B.HDFS using EBS Volumes
C.Local file system
D.EMRFS

Answer – D
The AWS Documentation mentions the following
EMRFS is an implementation of the Hadoop file system used for reading and writing regular files from Amazon EMR directly to Amazon S3. EMRFS provides the convenience of storing persistent data in Amazon S3 for use with Hadoop while also providing features like Amazon S3 server-side encryption, read-after-write consistency, and list consistency.
All other options are incorrect because these are all temporary storage options
For more information on EMR File systems, please refer to the below URL
https://docs.aws.amazon.com/emr/latest/ManagementGuide/emr-plan-file-systems.html