You observe that the number of spilled records from map tasks for exceeds the number of map
output records. You child heap size is 1 GB and your io.sort.mb value is set to 100MB. How would
you tune your io.sort.mb value to achieve maximum memory to disk I/O ratio?

You have a cluster running with the Fair in Scheduler enabled. There are currently no jobs running
on the cluster, and you submit a job A, so that only job A is running on the cluster. A while later,
you submit job B, Now job A and job B are running on the cluster at the same time.
Which of the following describes how the Fair Scheduler operates? (Choose 2)

Hadoop provider web interface can be used for all of the following EXCEPT: (choose 1)

The most important consideration for slave nodes in a Hadoop cluster running production jobs that
require short turnaround times is:

Identify two features/issues that MapReduce v2 (MRv2/YARN) is designed to address:

It is recommended that you run the HDFS balancer periodically. Why? (Choose 3)

Which of the following statements is the most accurate about the choice of operating systems to
run on a Hadoop cluster?

For a MapReduce job, what’s the relationship between tasks and task attempts?

Choose three reasons why should you run the HDFS balancer periodically?

The failure of which daemon makes HDFS unavailable on a cluster running MapReduce v1
(MRv1)?