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Mapper and Reducer implementations can use the ________ to report progress or just indicate that they are alive.

August 13, 2021August 13, 2021 administrator

Mapper and Reducer implementations can use the ________ to report progress or just indicate that they are alive.

Reporter

Excellent ! Your Answer is Correct. Explanation: Reporter is a facility for MapReduce applications to report progress, set application-level status messages and update Counters.

Partitioner

OutputCollector

All Options are Correct

Define the Port Numbers for NameNode, Task Tracker and Job Tracker.

August 12, 2021August 12, 2021 administrator

Define the Port Numbers for NameNode, Task Tracker and Job Tracker.

All Options are Correct

Excellent ! Your Answer is Correct

NameNode

Task Tracker

Job Tracker

Reducer is input the grouped output of a :

August 12, 2021August 12, 2021 administrator

Reducer is input the grouped output of a :

Mapper

Excellent ! Your Answer is Correct. In the phase the framework, for each Reducer, fetches the relevant partition of the output of all the Mappers, via HTTP.

Reducer

Writable

Readable

Interface ____________ reduces a set of intermediate values which share a key to a smaller set of values.

August 12, 2021August 12, 2021 administrator

Interface ____________ reduces a set of intermediate values which share a key to a smaller set of values.

Reducer

Excellent ! Your Answer is Correct. Reducer implementations can access the JobConf for the job.

Mapper

Writable

Readable

________ is the slave/worker node and holds the user data in the form of Data Blocks.

August 12, 2021August 12, 2021 administrator

________ is the slave/worker node and holds the user data in the form of Data Blocks.

DataNode

Excellent ! Your Answer is Correct. A DataNode stores data in the [HadoopFileSystem]. A functional filesystem has more than one DataNode, with data replicated across them.

NameNode

Data block

Replication

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

August 12, 2021August 12, 2021 administrator

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

All Options are Correct

Excellent ! Your Answer is Correct. Data is replicated across different DataNodes to ensure a high degree of fault-tolerance.

Replication Factor is changed

DataNode goes down

Data Blocks get corrupted

_________ identifies filesystem pathnames which work as usual with regular expressions.

August 12, 2021August 12, 2021 administrator

_________ identifies filesystem pathnames which work as usual with regular expressions.

None of the Option is Correct

Excellent ! Your Answer is Correct. identifies destination directory which would contain the archive.

archiveName

source

destination

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

August 12, 2021August 12, 2021 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

None of the Option is Correct

_________ is a pluggable Map/Reduce scheduler for Hadoop which provides a way to share large clusters.

August 12, 2021August 12, 2021 administrator

_________ is a pluggable Map/Reduce scheduler for Hadoop which provides a way to share large clusters.

Capacity Scheduler

Excellent ! Your Answer is Correct. The Capacity Scheduler supports for multiple queues, where a job is submitted to a queue.

Flow Scheduler

Data Scheduler

None of the Option is Correct

Which of the following parameter describes destination directory which would contain the archive ?

August 12, 2021August 12, 2021 administrator

Which of the following parameter describes destination directory which would contain the archive ?

destination

Excellent ! Your Answer is Correct. -archiveName is the name of the archive to be created.

archiveName

source

None of the Option is Correct

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