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Only need to practice for 20 to 30 hours

You will get to know the valuable exam tips and the latest question types in our CCA-470 certification training files, and there are special explanations for some difficult questions, which can help you to have a better understanding of the difficult questions. All of the questions we listed in our CCA-470 practice exam materials are the key points for the IT exam, and there is no doubt that you can practice all of CCA-470 best questions within 20 to 30 hours, even though the time you spend on it is very short, however the contents you have practiced are the quintessence for the IT exam. And of course, if you still have any misgivings, you can practice our CCA-470 certification training files again and again, which may help you to get the highest score in the IT exam.

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

1. Choose three reasons why should you run the HDFS balancer periodically?

A) To ensure that there is consistent disk utilization across the DataNodes.
B) To ensure that there is capacity in HDFS tor additional data.
C) To improve data locality for MapReduce tasks.
D) To ensure that all blocks in the cluster are 128MB in size.
E) To help HDFS deliver consistent performance under heavy loads.

2. You are a Hadoop cluster with a NameNode on host mynamenode. What are two ways to determine available HDFS space in your cluster?

A) Connect to http://mynamemode:50070/ and locate the DFS Remaining value.
B) Run hadoop dfsadmin -report and locate the DFS Remaining value.
C) Run hadoop fs -du/and locate the DFS Remaining value.
D) Run hadoop dfsadmin -SpaceQuota and subtract HDFS Used from Configured Capacity.

3. What would be a reasonable configuration of disk drives in a Hadoop datanode?

A) One 1TB disk drive
B) Four 1TB disk drives in a RAID configuration
C) 48 1.5 TB disk drives in a RAID configuration
D) Four 1TB disk drives in a JBOD configuration
E) 48 1.5TB disk drives in a JBOD configuration

4. What determines the number of Reduces that run a given MapReduce job on a cluster running MapReduce v1 (MRv1)?

A) It is set by the developer.
B) It is set by the JobTracker based on the amount of intermediate data.
C) It is set and fixed by the cluster administrator in mapred-site.xml. The number set always run for any submitted job.
D) It is set by the Hadoop framework and is based on the number of InputSplits of the job.

5. Which daemon spawns child JVMs to perform MapReduce processing?

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

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