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Cloudera Certified Administrator for Apache Hadoop CDH4 Sample Questions:

1. What additional capability does Ganglia provide to monitor a Hadoop?

A) Ability to monitor the amount of free space on HDFS.
B) Ability to monitor NameNode memory usage.
C) Ability to monitor free task slots.
D) Ability to monitor number of files in HDFS.
E) Ability to monitor processor utilization.

2. Your cluster implements hdfs high availability (HA) your two namenodes are named hadoop01 and hadoop02. What occurs when you execute the command:
Sudo -u hdfs haadmin -failover hadoop01 hadoop02

A) Hadoop01 is fenced, and hadoop02 becomes the active namenode
B) Hadoop02 is fenced, and hadoop01 becomes active namenode
C) Hadoop02 becomes the standby namenode and hadoop01 becomes the active namenode
D) Hadoop01 becomes inactive and hadoop02 becomes the active namenode

3. How must you format the underlying filesystem of your Hadoop cluster's slave nodes running on Linux?

A) They may be formatted in nay Linux filesystem
B) They must be formatted as HDFS
C) They must be formatted as either ext3 or ext4
D) They must not be formatted - - HDFS will format the filesystem automatically

4. Which MapReduce daemon instantiates user code, and executes map and reduce tasks on a cluster running MapReduce v1 (MRv1)?

A) TaskTracker
B) DataNode
C) JobTracker
D) NameNode
E) NodeManager
F) ResourceManager
G) ApplicationMaster

5. You are a Hadoop cluster with a NameNode on host mynamenode. What are two ways to determine available HDFS space in your cluster?

A) Run hadoop dfsadmin -SpaceQuota and subtract HDFS Used from Configured Capacity.
B) Run hadoop dfsadmin -report and locate the DFS Remaining value.
C) Run hadoop fs -du/and locate the DFS Remaining value.
D) Connect to http://mynamemode:50070/ and locate the DFS Remaining value.

Solutions: