MapReduce Programming Quiz-1

The output of the _______ is not sorted in the Mapreduce framework for Hadoop.

• Mapper

• Cascader

• Scalding

• Reducer

• None of the mentioned

Which of the following phases occur simultaneously ?

• Shuffle and Sort

• Reduce and Sort

• Shuffle and Map

• All of the mentioned

The ________ option allows you to copy jars locally to the current working directory of tasks and automatically unjar the files.

• archives

• files

• task

• None of the mentioned

______________ class allows the Map/Reduce framework to partition the map outputs based on certain key fields, not the whole keys.

• KeyFieldPartitioner

• KeyFieldBasedPartitioner

• KeyFieldBased

• None of the mentioned

Although the Hadoop framework is implemented in Java , MapReduce applications need not be written in :

• Java

• C

• C#

• None of the mentioned

The MapReduce algorithm contains two important tasks, namely __________.

• mapped, reduce

• mapping, Reduction

• Map, Reduction

• Map, Reduce

_____ takes a set of data and converts it into another set of data, where individual elements are broken down into tuples (key/value pairs).

• Map

• Reduce

• Both A and B

• Node

______ task, which takes the output from a map as an input and combines those data tuples into a smaller set of tuples.

• Map

• Reduce

• Node

• Both A and B

In how many stages the MapReduce program executes?

• 2

• 3

• 4

• 5

Which of the following is used to schedules jobs and tracks the assign jobs to Task tracker?

• SlaveNode

• MasterNode

• JobTracker

• Task Tracker