Question-14: You are using third party storage layer for storage like IBM Spectrum instead of default HDFS

Question-14: You are using third party storage layer for storage like IBM Spectrum instead of default HDFS provided by Cloudera CDP Private Base. And IBM Spectrum has built-in encryption per node basis and HDFS provides user level encryption.

1. If User Level encryption is enabled, then you can not use built-in encryption.
2. If User Level encryption is enabled, then also you can use built-in encryption, which is per node basis.
3. If User Level encryption is disabled, then you can not use built-in encryption.
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   This Question is from QuickTechie Cloudera CDP Certification Preparation Kit. 

Answer: 4

Exp: If one file is set with Access Control List (ACL) (POSIX or NFSv4 ACL), IBM Spectrum Scale HDFS Transparency does not provide the interface to disable the ACL check at the IBM Spectrum Scale HDFS Transparency layer. If you want to disable the ACL for one file, the only way is to remove the ACL.

HDFS level encryption is per user based, whereas IBM Spectrum Scale built-in encryption is per node based. Therefore, if the use case demands more fine-grained control at the user level, use HDFS level encryption. However, if you enable HDFS level encryption, you cannot get ...This HDFS encryption is supported since HDFS Transparency 3.0.0-0 and 2.7.3-4.