Cluster Summary:
45 files and directories, 12 blocks = 57 total. Heap size is 15.31 MB/193.38MB(7%)

Refer to the above screenshot.
You configure a Hadoop cluster with seven DataNodes and on of your monitoring UIs displays the
details shown in the exhibit.
What does the this tell you?

Which two features does Kerberos security add to a Hadoop cluster?

Assuming a cluster running HDFS, MapReduce version 2 (MRv2) on YARN with all settings at
their default, what do you need to do when adding a new slave node to cluster?

Which YARN daemon or service negotiations map and reduce Containers from the Scheduler,
tracking their status and monitoring progress?

During the execution of a MapReduce v2 (MRv2) job on YARN, where does the Mapper place the
intermediate data of each Map Task?

You suspect that your NameNode is incorrectly configured, and is swapping memory to disk.
Which Linux commands help you to identify whether swapping is occurring?

On a cluster running CDH 5.0 or above, you use the hadoop fs –put command to write a 300MB
file into a previously empty directory using an HDFS block size of 64 MB. Just after this command
has finished writing 200 MB of this file, what would another use see when they look in directory?

Which command does Hadoop offer to discover missing or corrupt HDFS data?

You are planning a Hadoop cluster and considering implementing 10 Gigabit Ethernet as the
network fabric. Which workloads benefit the most from faster network fabric?

Your cluster is running MapReduce version 2 (MRv2) on YARN. Your ResourceManager is
configured to use the FairScheduler. Now you want to configure your scheduler such that a new
user on the cluster can submit jobs into their own queue application submission. Which
configuration should you set?