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Cloudera CCA-470 Exam Syllabus Topics:

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

1. Which of the following statements arc accurate in describing features of Hadoop rack awareness? (Choose 2)

A) Even for small clusters on a single rack, configuring rack awareness will improve performance.
B) HDFS is rack aware but MapReduce daemons are not.
C) Hadoop gives preference to intra-rack data transfer In order to conserve bandwidth.
D) Rack location is considered in the HDFS block placement policy.
E) Configuration of rack awareness is accomplished using a configuration file. You cannot use a rack topology script.

2. For a MapReduce job, what's the relationship between tasks and task attempts?

A) There are always at least as many task attempts as there are tasks.
B) There are always exactly as many task attempts as there are tasks.
C) There are always at most as many task attempts as there are tasks.

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

4. Your existing Hadoop cluster has 30 slave nodes, each of which has 4 x 2T hard drives. You plan to add another 10 nodes. How much disk space can your new nodes contain?

A) The new nodes must all contain 8TB of disk space, but it does not matter how the disks are configured
B) The new nodes cannot contain more than 8TB of disk space
C) The new nodes must all contain 4 x 2TB hard drives
D) The new nodes can contain any amount of disk space

5. 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) FIFO Scheduler
B) Capacity Scheduler
C) Completely Fair Scheduler (CFS)
D) Fair Scheduler

Solutions: