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

1. Which three distcp features can you utilize on a Hadoop cluster?

A) Use distcp to copy physical blocks from the source to the target destination in your cluster.
B) Use distcp to copy HBase table files.
C) Use distcp to copy data between directories inside the same cluster.
D) Use distcp to copy files only between two clusters or more. You cannot use distcp to copy data between directories inside the same cluster.
E) Use distcp to run an internal MapReduce job to copy files.

2. For a MapReduce job, what's the relationship between tasks and task attempts?

A) There are always exactly as many task attempts as there are tasks.
B) There are always at least as many task attempts as there are tasks.
C) There are always at most as many task attempts as there are tasks.

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

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

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

5. Identify four characteristics of a 300MB file that has been written to HDFS with block size of 128MB and all other Hadoop defaults unchanged?

A) The third block will be 64MB
B) Two of the initial blocks will be 128MB
C) All three blocks will be 128MB
D) The file will consume 1152MB of space in the cluster
E) Each block will be replicated nine times
F) Each block will be replicated three times
G) The third Initial block will be 44 MB
H) The file will be split into three blocks when initially written into the cluster

Solutions: