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

1. Which three processes does HDFS High Availability (HA) enable on your cluster?

A) Shut one NameNode down for maintenance without halting the cluster
B) Configure unlimited hot standby NameNode.
C) Automatically 'fail over' between NameNodes if one goes down
D) Manually 'fail over' between NameNodes
E) Write data to two clusterssimultaneously

2. When setting the HDFS block size, which of the following considerations is the least important?

A) Disk capacity of the NameNode.
B) Size of "typical" files that will be stored in HDFS.
C) Amount of memory on the NameNode.
D) Number of files that will be stored in HDFS.
E) Number of DataNodes.

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 B gets submitted, it will get assigned tasks, while job A continues to run with fewer tasks.
C) When job A gets submitted, it consumes all the task slot
D) When job A gets submitted, it doesn't consume all the task slot

4. Identify which two daemons typically run each slave node in a Hadoop cluster running MapReduce v1 (MRv1)

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

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

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

Solutions: