Your Custer’s HOFS block size is 64MB. You have a directory containing 100 plain text files, each
of which Is 100MB in size. The InputFormat for your job is TextInputFormat. How many Mappers
will run?

The Hadoop framework provides a mechanism for coping with machine issues such as faulty
configuration or impending hardware failure. MapReduce detects that one or a number of
machines are performing poorly and starts more copies of a map or reduce task. All the tasks run
simultaneously and the task that finish first are used. This is called:

In a MapReduce job with 500 map tasks, how many map task attempts will there be?

You have written a Mapper which invokes the following five calls to the outputcollector.collect
method:
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How many times will the Reducer’s reduce method be invoked.

Your client application submits a MapReduce job to your Hadoop cluster. The Hadoop framework
looks for an available slot to schedule the MapReduce operations on which of the following
Hadoop computing daemons?

Which of the Following best describes the lifecycle of a Mapper?

How does the NameNode detect that a DataNode has failed?

Which happens if the NameNode crashes?

What is the standard configuration of slave nodes in a Hadoop cluster?

Which MapReduce daemon runs on each slave node and participates in job execution?