When a MapReduce application is executed, which of the following actions occurred before the map phase?

Oozie's workflow.xml file is a workflow configuration file

A large manufacturing company plans to transform its internal logistics data and sales data into big data. The design department has given an analysis of the data storage plan. Which of the following descriptions is correct?

What are the several parameter setting methods for Spark applications? (multiple choices)

Which distributed computing frameworks can the Hive component of FusionInsigt HD run on? (multiple choice)