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Cloudera CCA-410 Exam Syllabus Topics:

Cloudera Certified Administrator for Apache Hadoop CDH4 Sample Questions:

1. Using cloudera manager on CDH4 cluster running mapreduce V1(MRv1), you delete a tasktracker role instance from a host that also a runs a datanode role instance and a region server role instance.cloudera
Manager make changes to the cluster and prompts you to the accept the changes.
What other configuration option will cloudera manager automatically prompt you to change?

A) the option to specify an alternate slave host to place the received data node role instance
B) The option to failover to the instance by namenode
C) The option to change java maximum heap sizes for the other role instances
D) the option to immediately rebalance the cluster

2. What action occurs automatically on a cluster when a DataNode is marked as dead?

A) The NameNode informs the client which write the blocks that are no longer available; the client then re-writes the blocks to a different DataNode.
B) The next time a client submits job that requires blocks from the dead DataNode, the JobTracker receives no heart beats from the DataNode. The JobTracker tells the NameNode that the DataNode is dead, which triggers block re-replication on the cluster.
C) The replication factor of the files which had blocks stored on the dead DataNode is temporarily reduced, until the dead DataNode is recovered and returned to the cluster.
D) The NameNode forces re-replication of all the blocks which were stored on the dead DataNode.

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

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

4. Which daemons instantiates JVM's to perform mapreduce processing in a cluster running mapreduce v1 (MRv1)?

A) Tasktracker
B) Namenode
C) Applicationmaster
D) applicationmanager
E) Resourcemanager
F) Nodemanager
G) Jobtracker
H) Datanode

5. What does CDH packaging do on install to facilitate Kerberos security setup?

A) Automatically configure permissions for log files at $MAPPED_LOG_DIR/userlogs
B) Creates a set of pre-configured Kerberos keytab files and their permissions.
C) Creates directories for temp, hdfs, and mapreduce with correct permissions.
D) Creates and configures you kdc with default cluster values.
E) Creates users for hdfs and mapreduce to facilitate role assignment.

Solutions: