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

1. Identify the daemon that performs checkpoint operations of the namespace state in a cluster configured with HDFS High Availability (HA) using Quorum based-storage?

A) BackupNode
B) NodeManeger
C) NameNode
D) Standby NameNode
E) JournalNode
F) CheckpointNode
G) Secondary NameNode

2. Where does a MapReduce job store the intermediate data output from Mappers?

A) On the underlying filesystem of the local disk of the machine on which the Mapper ran.
B) In HDFS, in temporary directory defined mapred.tmp.dir.
C) In HDFS, in the job's output directory.
D) On the underlying filesystem of the local disk machine on which the JobTracker ran.
E) Stores on the underlying filesystem of the local disk of the machine on which the Reducer.

3. What happens if a Mapper on one node goes into an infinite loop while running a MapReduce job?

A) After a period of time, the TaskTracker will kill the Map Task.
B) The Mapper will run indefinitely; the TaskTracker must be restarted to kill it
C) The job will immediately fail.
D) After a period of time, the JobTracker will restart the TaskTracker on the node on which the map task is running

4. What information is stored on disk on the NameNode? (Choose 4)

A) The directory structure of the files in HDFS.
B) A catalog of DataNodes and the blocks that are stored on them.
C) An edit log of changes that have been made since the last snapshot compaction by the Secondary NameNode.
D) Names of the files in HDFS.
E) The status of the heartbeats of each DataNode.
F) An edit log of changes that have been made since the last backup of the NameNode.
G) File permissions of the files in HDFS.

5. Under which of the following scenarios would it be most appropriate to consider using faster (e.g., 10 Gigabit) Ethernet as the network fabric for your Hadoop cluster?

A) When the typical workload generates a large amount of intermediate data, on the order of the input data itself.
B) When the typical workload consists of processor-intensive tasks.
C) When the typical workload consumes a large amount of input data, relative to the entire Canada of HDFS.
D) When the typical workload generates a large amount of output data, significantly larger than the amount of intermediate data.

Solutions: