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Cloudera CCA-410 Exam Syllabus Topics:

Cloudera Certified Administrator for Apache Hadoop CDH4 Sample Questions:

Question 1

In the context of configuring a Hadoop cluster for HDFS High Availability (HA), 'fencing' refers to:

A. Isolating the standby NameNode from write access to the fsimage and edits files.
B. Isolating a failed NameNode from write access to the fsimage and edits files so that is cannot resume write operations if it recovers.
C. Isolating both HA NameNodes to prevent a client application from killing the NameNode daemons.
D. Isolating the cluster's master daemon to limit write access only to authorized clients.

Question 2

You are running two Hadoop clusters(cluster1 and cluster2), they run identical versions of hadoop.
You want to copy the data inside /home/foo/cluster1 to cluster2 into the directory /home/bar/
What is the correct distcp syntax to copy one directory tree from one cluster to the other cluster?

A. $ distCp hdfs://cluster1/home/foo hdfs://cluster2/home/bar/
B. $ Hadoop distCp cluster1:/home/foo cluster2:/home/bar/
C. $ hadoop distCp hdfs://cluster1/home/foo hdfs://cluster2/home/bar/
D. $ distCp cluster1:/home/foo cluster2:/home/bar/

Question 3

You has a cluster running with the Fail Scheduler enabled. There are currently no jobs running on the cluster you submit a job A, so that only job A is running on the cluster. A while later, you submit job B.
Now job A and Job B are running on the cluster al the same time. How will the Fair' Scheduler handle these two Jobs?

A. When job B gets submitted, Job A has to finish first, before job it can get scheduled.
B. When job A gets submitted, it consumes all the task slot
C. When job B gets submitted, it will get assigned tasks, while job A continues to run with fewer tasks.
D. When job A gets submitted, it doesn't consume all the task slot

Question 4

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 12TB
B. Approximately 3TB
C. Approximately 48TB
D. Approximately 16TB

Question 5

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

Solutions: