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

1. Hadoop provider web interface can be used for all of the following EXCEPT: (choose 1)

A) Keeping track of the number of files and directories stored in HDFS.
B) Browsing files in HDFS.
C) Keeping track of jobs running on the cluster.
D) Keeping track of processor and memory utilization on each individual slave node.
E) Keeping track of tasks running on each individual slave node.

2. Which of the following scenarios makes HDFS unavailable?

A) NameNode failure
B) Secondary NameNode failure
C) TaskTracker failure
D) JobTracker failure
E) DataNode failure

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

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

4. Which two updates occur when a client application opens a stream to begin a file write on a cluster running MapReduce v1 (MRv1)?

A) Once the write stream closes on the DataNode, the DataNode immediately initiates a black report to the NameNode.
B) The change is written to the edits file.
C) The metadata in RAM on the NameNode is flushed disk.
D) The metadata in the RAM on the NameNode is flushed to disk.
E) The metadata in RAM on the NameNode is updated.
F) The change is written to the NameNode disk.

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

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

Solutions: