Category: Big Data Technology

Which of the following scenario may not be a good fit for HDFS ?

administrator
Which of the following scenario may not be a good fit for HDFS ?
HDFS is not suitable for scenarios requiring multiple/simultaneous writes to the same file
Excellent ! Your Answer is Correct. HDFS can be used for storing archive data since it is cheaper as HDFS allows storing the data on low cost commodity hardware while ensuring a high degree of fault-tolerance.
HDFS is suitable for storing data related to applications requiring low latency data access
HDFS is suitable for storing data related to applications requiring low latency data access
None of the Option is Correct

On a tasktracker, the map task passes the split to the createRecordReader() method on InputFormat to obtain a _________ for that split.

administrator
On a tasktracker, the map task passes the split to the createRecordReader() method on InputFormat to obtain a _________ for that split.
RecordReader
Excellent ! Your Answer is Correct. The RecordReader loads data from its source and converts into key-value pairs suitable for reading by mapper.
InputReader
OutputReader
None of the Option is Correct

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

administrator
InputFormat class calls the ________ function and computes splits for each file and then sends them to the jobtracker.
getSplits
Excellent ! Your Answer is Correct. InputFormat uses their storage locations to schedule map tasks to process them on the tasktrackers.
gets
puts
None of the Option is Correct

Which of the tab shows all the role instances that have been instantiated for this service?

administrator
Which of the tab shows all the role instances that have been instantiated for this service?
Instance
Excellent ! Your Answer is Correct. Explanation: The Instances page displays the results of the configuration validation checks it performs for all the role instances for this service.
Status
Service
All Options are Correct

__________ Manager’s Service feature monitors dozens of service health and performance metrics about the services and role instances running on your cluster.

administrator
__________ Manager’s Service feature monitors dozens of service health and performance metrics about the services and role instances running on your cluster.
Cloudera
Excellent ! Your Answer is Correct. Explanation: Manager’s Service feature presents health and performance data in a variety of formats.
Microsoft
Amazon
None of the Option is Correct
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