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Cloudera CCA-410 Exam Syllabus Topics:

Cloudera Certified Administrator for Apache Hadoop CDH4 Sample Questions:

1. What happens if a Mapper on one node goes into an infinite loop while running a MapReduce job?

A) After a period of time, the TaskTracker will kill the Map Task.
B) After a period of time, the JobTracker will restart the TaskTracker on the node on which the map task is running
C) The job will immediately fail.
D) The Mapper will run indefinitely; the TaskTracker must be restarted to kill it

2. When requesting a file, how does HDFS retrieves the blocks associated with that file?

A) the client polls the datanodes for the block ID's
B) the namenode requires the datanode for the block ID's
C) the namenode reads the block ID's from disk
D) The namenode reads the block ID's from memory

3. You configure your hadoop cluster with mapreduce V1 (MRv1) along with HDFS high availability (HA) Quorum-based storage. On which nodes should you configure and run your journal node daemon(s) to guarantee a quorum?

A) Namenode, standby namenode and jobtracker
B) On each datanode
C) Namenode
D) Namenode and standby namenode
E) standby namenode
F) standby namenode, jobtracker, resourcemanager
G) Jobtracker

4. On a cluster running MapReduce v1 (MRv1), the value of the mapred.tasktracker.map.tasks.maximum configuration parameter in the mapred-site.xml file should be set to:

A) The maximum number of Map tasks can run simultaneously on an individual node.
B) The maximum number of Map tasks which can run on the cluster as a whole.
C) Half the number of the maximum number of Reduce tasks which can run simultaneously on an individual node.
D) Half the number of the maximum number of Reduce tasks which can run on the cluster as a whole.
E) The same value on each slave node.

5. The failure of which daemon makes HDFS unavailable on a cluster running MapReduce v1 (MRv1)?

A) Secondary NameNode
B) DataNode
C) NameNode
D) Resource Manager
E) Application Manager
F) Node Manager

Solutions: