Cloudera CCA-470 - Cloudera Certified Administrator for Apache Hadoop CDH4 Upgrade Exam (CCAH)

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Cloudera CCA-470 Exam Syllabus Topics:

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

2. Identify two features/issues that MapReduce v2 (MRv2/YARN) is designed to address:

A) Ability to run frameworks other than MapReduce, such as MPI.
B) Resource pressure on the JobTrackr
C) Single point of failure in the NameNode.
D) Standardize on a single MapReduce API.
E) Reduce complexity of the MapReduce APIs.
F) HDFS latency.

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

4. For each job, the Hadoop framework generates task log files. Where are Hadoop's task log files stored?

A) On the local disk of the slave node running the task.
B) Cached on the local disk of the slave node running the task, then purged immediately upon task completion.
C) In HDFS, in the directory of the user who generates the job.
D) Cached on the local disk of the slave node running the task, then copied into HDFS.

5. What do you need to do when adding new slave nodes to a cluster?

A) Restart the NameNode daemon.
B) Halt and resubmit any running MapReduce jobs to guarantee correctness.
C) Increase the value of dfs.number.of.nodes in hdfs-site.xml.
D) Add a new entry to /etc/slavenodes on the NameNode host.
E) add the new node's DNS name to the conf/slaves file on the master node.

Solutions: