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Hadoop
Quiz 3
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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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