Your cluster has the following characteristics:
A rack aware topology is configured and on
Replication is set to 3
Cluster block size is set to 64MB
Which describes the file read process when a client application connects into the cluster and
requests a 50MB file?

Your Hadoop cluster is configuring with HDFS and MapReduce version 2 (MRv2) on YARN. Can
you configure a worker node to run a NodeManager daemon but not a DataNode daemon and still
have a functional cluster?

You have A 20 node Hadoop cluster, with 18 slave nodes and 2 master nodes running HDFS High

Availability (HA). You want to minimize the chance of data loss in your cluster. What should you
do?

You are running Hadoop cluster with all monitoring facilities properly configured.
Which scenario will go undeselected?

You decide to create a cluster which runs HDFS in High Availability mode with automatic failover,
using Quorum Storage. What is the purpose of ZooKeeper in such a configuration?

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

Your cluster implements HDFS High Availability (HA). Your two NameNodes are named nn01 and
nn02. What occurs when you execute the command: hdfs haadmin –failover nn01 nn02?

You have a Hadoop cluster HDFS, and a gateway machine external to the cluster from which
clients submit jobs. What do you need to do in order to run Impala on the cluster and submit jobs
from the command line of the gateway machine?

You have just run a MapReduce job to filter user messages to only those of a selected
geographical region. The output for this job is in a directory named westUsers, located just below
your home directory in HDFS. Which command gathers these into a single file on your local file
system?

In CDH4 and later, which file contains a serialized form of all the directory and files inodes in the
filesystem, giving the NameNode a persistent checkpoint of the filesystem metadata?