Hadoop Fundamentals

A ________ serves as the master and there is only one NameNode per cluster.

• Data Node

• NameNode

• Data block

• Replication

HDFS works in a __________ fashion

• master-worker

• master-slave

• worker/slave

• worker/master

________ NameNode is used when the Primary NameNode goes down.

• Rack

• Data

• Secondary

• Name

The need for data replication can arise in various scenarios like ____________

• Replication Factor is changed

• DataNode goes down

• Data Blocks get corrupted

• All of the mentioned

HDFS is implemented in _____________ programming language.

• Scala

• C++

• Java

• C

For YARN, the ___________ Manager UI provides host and port information.

• Data Node

• NameNode

• Resource

• Replication

________ is a programming model designed for processing large volumes of data in parallel by dividing the work into a set of independent tasks.

• Hive

• MapReduce

• Pig

• Lucene

The daemons associated with the MapReduce phase are ________ and task-trackers.

• job-tracker

• map-tracker

• reduce-tracker

• all of the mentioned

inputFormat class calls the ________ function and computes splits for each file and then sends them to the jobtracker.

• puts

• gets

• getSplits

• all of the mentioned

he default InputFormat is __________ which treats each value of input a new value and the associated key is byte offset.

• TextFormat

• TextInputFormat

• InputFormat

• All of the mentioned