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Cloudera Certified Administrator for Apache Hadoop CDH4 Sample Questions:

1. Identify which two daemons typically run each slave node in a Hadoop cluster running MapReduce v1 (MRv1)

A) JobTracker
B) Secondary NameNode
C) NodeManager
D) NameNode
E) TaskTracker
F) DataNode

2. Your developers request that you enable them to use Hive on your Hadoop cluster. What do install and/or configure?

A) Install the Hive interpreter on the master node running the JobTracker, and configure a shared remote Hive Metastore.
B) Install the Hive interpreter on the client machines only, and configure a shared remote Hive Metastore.
C) Install the Hive interpreter on the client machines and all nodes on the cluster
D) Install the Hive Interpreter on the client machines and all the slave nodes, and configure a shared remote Hive Metastore.

3. 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.

A) You must restart the NameNode daemon to apply the changes to the cluster
B) You don't need to restart any daemon, as they will pick up changes automatically.
C) You must modify the configuration files on only one of the DataNode machine
D) You must modify the configuration files on the NameNode only. DataNodes read their configuration from the master nodes.
E) You must modify the configuration files on each of the six DataNode machines.
F) You must restart all six DataNode daemons to apply the changes to the cluster.

4. Compare the hardware requirements of the NameNode with that of the DataNodes in a Hadoop cluster running MapReduce v1 (MRv1):

A) The NameNode and DataNodes should the same hardware configuration.
B) The NameNode requires less memory and less disk capacity than the DataNodes.
C) The NameNode requires more memory and requires greater disk capacity than the DataNodes.
D) The NameNode requires more memory and no disk drives.
E) The NameNode requires more memory but less disk capacity.

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

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

Solutions: