What is the function of the following Hadoop command?
du

In Hadoop, HDFS snapshots are taken for which of the following reasons? i) For providing protection against user error. ii) For providing backup. iii) For disaster recovery. iv) For copying data from data nodes.

Before being inserted to a disk, the intermediate output records emitted by the Map task are buffered in the local memory, using a circular buffer. Which of the following properties is used to configure the size of this circular buffer?

Which interface can decrease the amount of memory required by UDFs, by accepting the input in chunks?

Which Hive clause should be used for imposing a total order on the query results?

Which Hive command is used for creating a database named MyData?

Where would you configure the size of a block in a Hadoop environment?

In a MapReduce job, which phase runs after the Map phase completes?

Suppose you are trying to finish a Pig script that converts text in the input string to uppercase. What code is needed on line 2 below? 1 data = LOAD '/user/hue/pig/examples/data/midsummer.txt'... 2

Which type of Hadoop node executes file system namespace operations like opening, closing, and renaming files and directories?

MapReduce 1.0 _ YARN