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Cloudera CCA-470 Exam Syllabus Topics:

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

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

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

2. You set up the Hadoop cluster using NameNode Federation. One NameNode manages the/users namespace and one NameNode manages the/data namespace. What happens when client tries to write a file to/reports/myreport.txt?

A) The client throws an exception.
B) The file successfully writes to /users/reports/myreports/myreport.txt.
C) The file writes fails silently; no file is written, no error is reported.
D) The file successfully writes to /report/myreport.txt. The metadata for the file is managed by the first NameNode to which the client connects.

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

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

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

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

5. You are running a Hadoop cluster with all monitoring facilities properly configured. Which scenario will go undetected?

A) Map or reduce tasks that are stuck in an infinite loop.
B) MapReduce jobs that are causing excessive memory swaps.
C) A DataNode is disconnected from the cluster.
D) HDFS is almost full.
E) The NameNode goes down.

Solutions: