Cloudera CCA-410 pass test : Cloudera Certified Administrator for Apache Hadoop CDH4

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Cloudera CCA-410 Exam Syllabus Topics:

Cloudera Certified Administrator for Apache Hadoop CDH4 Sample Questions:

1. Which MapReduce daemon instantiates user code, and executes map and reduce tasks on a cluster running MapReduce v1 (MRv1)?

A) ResourceManager
B) NodeManager
C) NameNode
D) JobTracker
E) ApplicationMaster
F) DataNode
G) TaskTracker

2. Which two features does Kerberos security add to a Hadoop cluster?

A) User authentication on all remote procedure calls (RPcs)
B) Authentication for user access to the cluster against a central server
C) Root access to the cluster for users hdfs and mapred but non-root acess clients
D) Encryption for data on disk ("at rest")
E) Encryption on all remote procedure calls (RPCs)

3. What happens when a map task crashes while running a mapreduce job?

A) The jobtracker attempts to re-run the task on the same node
B) The job immediately fails
C) the jobtracket attempts to re-run the task on a different node
D) The tasktracker closes the JVM instance and restarts

4. You have a cluster running 32 slave nodes and 3 master nodes running mapreduce V1 (MRv1). You execute the command:
$ hadoop fsck /
What four cluster conditions running this command will return to you?

A) The current state of the file system returned from scanning individual blocks on each datanode
B) the current state of the file system according to the namenode
C) Under-replicated blocks
D) Configure capacity of your cluster
E) the location for every block
F) Blocks replicated improperly or that don't satisfy your cluster enhancement policy (e. g. , too many blocks replicated on the same node)
G) Number of datanodes
H) Number of dead datanodes

5. A slave node in your cluster has 24GB of Ram and 12 physical processor cores on hyper threading-enabled processor. You set the value of mapped. child.java.opts to -Xmx1G, and the value of mapred.tasktracker.map.tasks.maximum to 12. What is the appropriate value to set for mapred.Tastracker.reduce.tasks.maximum?

A) 16.
B) 12
C) 24
D) 20
E) 6
F) 2

Solutions: