A company has a lot of data in many disparate sources such as Hive, Cassandra, Redis, and MongoDB. The company wants to enable its employee to perform fast queries on these underlying data sources using a standard query language. Which of the following can be used for this purpose?

Answer options:

A.Presto
B.SparkSQL
C.Hive
D.Oozie

Answer - A
The AWS Documentation mentions the following
Presto is a fast SQL query engine designed for interactive analytic queries over large datasets from multiple sources.
The other components don’t have the ability to query multiple data sources
For more information on Presto, please visit the url
https://docs.aws.amazon.com/emr/latest/ReleaseGuide/emr-presto.html