Q.1
Under HDFS federation
  • Each namenode manages metadata of the entire filesystem.
  • Each namenode manages metadata of a portion of the filesystem.
  • Failure of one namenode causes loss of some metadata availability from the entire filesystem.
  • Each datanode registers with each namenode.
Q.2
The daemons associated with the MapReduce phase are ________ and task-trackers.
  • job-tracker
  • map-tracker
  • reduce-tracker
  • all of the mentioned
Q.3
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
Q.4
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
Q.5
________________refers to the biases, noise and abnormality in data, trustworthiness of data.
  • Value
  • Veracity
  • Velocity
  • Volume
Q.6
Apache Hadoop YARN stands for:
  • Yet Another Reserve Negotiator
  • Yet Another Resource Network
  • Yet Another Resource Negotiator
  • Yet Another Resource Manager
Q.7
_______________refers to the connectedness of big data.
  • Value
  • Veracity
  • Velocity
  • Valence
Q.8
_______________function processes a key/value pair to generate a set of intermediate key/value pairs.
  • Map
  • Reduce
  • Both Map and Reduce
  • None of the mentioned
Q.9
__________command displays a list of the contents of a directory specified by path provided by the user.
  • list
  • ls
  • display
  • trail
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