Cloudera CCA-410 Exam : Cloudera Certified Administrator for Apache Hadoop CDH4

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Cloudera CCA-410 Exam Syllabus Topics:

Cloudera Certified Administrator for Apache Hadoop CDH4 Sample Questions:

1. Identify the function performed by the Secondary NameNode daemon on a cluster configured to run with a single NameNode.

A) In this configuration, the Secondary NameNode is standby NameNode, ready to failover and provide high availability.
B) In this configuration, the Secondary NameNode performs a checkpoint operation on the files by the NameNode.
C) In this configuration, the Secondary NameNode performs deal-time backups of the NameNode.
D) In this configuration, the Secondary NameNode servers as alternate data channel for clients to reach HDFS, should the NameNode become too busy.

2. Which scheduler would you deploy to ensure that your cluster allows short jobs to finish within a reasonable time without starving long-running jobs?

A) Completely Fair Scheduler (CFS)
B) Capacity Scheduler
C) FIFO Scheduler
D) Fair Scheduler

3. Using hadoop's default settings, how much data will be able to store on your hadoop cluster if it is has 12 nodes with 4TB raw diskspace per node allocated to HDFS storage?

A) Approximately 3TB
B) Approximately 12TB
C) Approximately 16TB
D) Approximately 48TB

4. How many mappers required for a map reduce, job determine on a cluster running map reduce V1 (MRv1)?

A) The number of mappers is calculated by namenode based on the number of HDFS blocks in the files
B) the jobtracker chooses the number based on no of available nodes
C) The number mappers is equal to no of input splits calculated by client submitting
D) the developer specifies the number in the job configuration

5. Where does a MapReduce job store the intermediate data output from Mappers?

A) In HDFS, in temporary directory defined mapred.tmp.dir.
B) On the underlying filesystem of the local disk of the machine on which the Mapper ran.
C) Stores on the underlying filesystem of the local disk of the machine on which the Reducer.
D) On the underlying filesystem of the local disk machine on which the JobTracker ran.
E) In HDFS, in the job's output directory.

Solutions: