What two processes must you do if you are running a Hadoop cluster with a single NameNode
and six DataNodes, and you want to change a configuration parameter so that it affects all six
DataNodes.

You have a cluster running with the FIFO scheduler enabled. You submit a large job A to the
cluster which you expect to run for one hour. Then, you submit job B to the cluster, which you
expect to run a couple of minutes only. Let’s assume both jobs are running at the same priority.
How does the FIFO scheduler execute the jobs? (Choose 3)

What would be a reasonable configuration of disk drives in a Hadoop datanode?

You configure Hadoop cluster with both MapReduce frameworks, MapReduce v1 (MRv1) and
MapReduce v2 (MRv2/YARN). Which two MapReduce (computational) daemons do you need to
configure to run on your master nodes?

You configure you cluster with HDFS High Availability (HA) using Quorum-Based storage. You do
not implement HDFS Federation.
What is the maximum number of NameNodes daemon you should run on you cluster in order to
avoid a “split-brain” scenario with your NameNodes?

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

When setting the HDFS block size, which of the following considerations is the least important?

When determining the most appropriate ratio of processor cores to disk drives for a Hadoop
cluster, what are the considerations?

You set up the Hadoop cluster using NameNode Federation. One NameNode manages the/users
namespace and one NameNode manages the/data namespace. What happens when client tries
to write a file to/reports/myreport.txt?

Your Hadoop cluster has 25 nodes with a total of 100 TB (4 TB per node) of raw disk space
allocated HDFS storage. Assuming Hadoop’s default configuration, how much data will you be
able to store?