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

1. How must you format the underlying filesystem of your Hadoop cluster's slave nodes running on Linux?

A) They must not be formatted - - HDFS will format the filesystem automatically
B) They must be formatted as HDFS
C) They must be formatted as either ext3 or ext4
D) They may be formatted in nay Linux filesystem

2. You have a cluster running with the FIFO scheduler enabled. You submit a large job A to the
cluster which you expect to run for one hour. Then, you submit job B to the cluster, which you expect to run a couple of minutes only. Let's assume both jobs are running at the same priority.
How does the FIFO scheduler execute the jobs? (Choose 3)

A) Since job B needs only a few tasks, if might finish before job A completes.
B) The order of execution of tasks within a job may vary.
C) When a job is submitted, all tasks belonging to that job are scheduled.
D) Given jobs A and B submitted in that order, all tasks from job A will be scheduled before all tasks from job B.

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

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

4. A client wants to read a file from HDFS. How does the data get from the DataNodes to the client?

A) The NameNode reads the blocks from the DataNodes, and caches them. Then, the application reads the blocks from the NameNode.
B) The application reads the blocks directly from the DataNodes.
C) The blocks are sent to a single DataNode, then the application reads the blocks from that Data Node.

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

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

Solutions: