Which of the following option is correct about HCatalog?

(1) HCat offers MapReduce connectors.

(2) HCat provides users of other Hadoop tools such as Pig, Hive and MapReduce with Hive metadata.

(3) It ensures that users need not worry about where or in what format their data is stored.

Option (3) is the correct answer of this question.

Explanation:

HCatalog makes available Hive metadata to users of other Hadoop applications, such as Pig, MapReduce and Hive. it offers interfaces for MapReduce and Pig so that users can read data from and write data to the Hive warehouse. This means users don't have to care about where or in what format their data is stored. So we know this way that Hcatalog makes sure our data is secure. Others option does not belong to Hcatalog so these options are incorrect.