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

1. Which of the following scenarios makes HDFS unavailable?

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

2. Your developers request that you enable them to use Hive on your Hadoop cluster. What do install and/or configure?

A) Install the Hive interpreter on the client machines only, and configure a shared remote Hive Metastore.
B) Install the Hive Interpreter on the client machines and all the slave nodes, and configure a shared remote Hive Metastore.
C) Install the Hive interpreter on the client machines and all nodes on the cluster
D) Install the Hive interpreter on the master node running the JobTracker, and configure a shared remote Hive Metastore.

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

4. Identity four pieces of cluster information that are stored on disk on the NameNode?

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

5. Cluster Summary
45 files and directories, 12 blocks = 57 total. Heap Size is 15.31 MB / 193.38MB(7%)

Refer to the above screenshot.
You configure the Hadoop cluster with seven DataNodes and the NameNode's web UI displays the details shown in the exhibit.
What does this tells you?

A) The DataNode JVM on one host is not active.
B) The HDFS cluster is in the safe mode.
C) Your cluster has lost all HDFS data which had blocks stored on the dead DataNode.
D) One physical host crashed.

Solutions: