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

1. Which MapReduce v2 (MR2/YARN) daemon is a per-machine slave responsible for launching application containers and monitoring application resources usage?

A) TaskTracker
B) ApplicationMasterService
C) JobTracker
D) ResourceManager
E) NodeManager
F) ApplicationMaster

2. What action occurs automatically on a cluster when a DataNode is marked as dead?

A) The next time a client submits job that requires blocks from the dead DataNode, the JobTracker receives no heart beats from the DataNode. The JobTracker tells the NameNode that the DataNode is dead, which triggers block re-replication on the cluster.
B) The NameNode informs the client which write the blocks that are no longer available; the client then re-writes the blocks to a different DataNode.
C) The replication factor of the files which had blocks stored on the dead DataNode is temporarily reduced, until the dead DataNode is recovered and returned to the cluster.
D) The NameNode forces re-replication of all the blocks which were stored on the dead DataNode.

3. In a cluster configured with HDFS High Availability (HA) but NOT HDFS federation, each map task run:

A) In the same Java Virtual Machine as the DataNode.
B) In the same Java Virtual Machine as the JobTracker.
C) In the same Java Virtual Machine as the TaskTracker
D) In its own Java Virtual Machine.

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

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

5. You have a cluster running with the Fair in Scheduler enabled. There are currently no jobs running on the cluster, and 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 at the same time.
Which of the following describes how the Fair Scheduler operates? (Choose 2)

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

Solutions: