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Cloudera Certified Administrator for Apache Hadoop CDH4 Upgrade Exam (CCAH) Sample Questions:

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

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

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

3. You have a cluster running with the Fair Scheduler enabled and configured. You submit multiple jobs to cluster. Each job is assigned to a pool. How are jobs scheduled? (Choose 2)

A) Pools are assigned priorities. Pools with higher priorities are executed before pools with lower priorities.
B) Each pool's share of task slots may change throughout the course of job execution.
C) Each pool gets 1/N of the total available task slots, where N is the number of jobs running on the cluster.
D) Pools get a dynamically-allocated share of the available task slots (subject to additional constraints).
E) Each pool's share of task slots remains static within the execution of any individual job.
F) Each pool gets 1/M of the total available task slots, where M is the number of nodes in the cluster

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

A) Authentication for user access to the cluster against a central server
B) Encryption on all remote procedure calls (RPCs)
C) User authentication on all remote procedure calls (RPcs)
D) Root access to the cluster for users hdfs and mapred but non-root acess clients
E) Encryption for data on disk ("at rest")

5. You are running a Hadoop cluster with NameNode on host mynamenode, a secondary NameNode on host mysecondary and DataNodes.
Which best describes how you determine when the last checkpoint happened?

A) Connect to the web UI of the NameNode (http://mynamenode:50070/) and look at the "Last Checkpoint" information
B) Execute hdfs dfsadmin -report on the command line in and look at the Last Checkpoint information.
C) Connect to the web UI of the Secondary NameNode (http://mysecondarynamenode:50090) and look at the "Last Checkpoint" information
D) Execute hdfs dfsadmin -saveNameSpace on the command line which returns to you the last checkpoint value in fstime file.

Solutions: