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Cloudera CCA-470 Exam Syllabus Topics:

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

1. What's the relationship between JobTrackers and TaskTrackers?

A) The JobTracker runs on a single master node and accepts MapReduce jobs from clients. A TaskTracker runs on every slave node and is responsible for managing actual map and reduce tasks.
B) The TaskTrackers runs on a single master node and accepts MapReduce jobs from clients. A JobTracker runs on every slave node and is responsible for managing map and reduce tasks.
C) The JobTracker runs on a single master node, but forks a separate instance of itself for every client MapReduce job. A TaskTracker runs on every slave node and is responsible for managing actual map and reduce tasks.
D) Every node in the cluster runs both a JobTracker and a TaskTracker. The JobTrackers manage jobs, and the TaskTrackers are responsible for managing actual map and reduce tasks.

2. What two processes must you do if you are running a Hadoop cluster with a single NameNode and six DataNodes, and you want to change a configuration parameter so that it affects all six DataNodes.

A) You must restart the NameNode daemon to apply the changes to the cluster
B) You must modify the configuration files on each of the six DataNode machines.
C) You must restart all six DataNode daemons to apply the changes to the cluster.
D) You must modify the configuration files on only one of the DataNode machine
E) You must modify the configuration files on the NameNode only. DataNodes read their configuration from the master nodes.
F) You don't need to restart any daemon, as they will pick up changes automatically.

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

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

4. On a cluster running MapReduce v1 (MRv1), the value of the mapred.tasktracker.map.tasks.maximum configuration parameter in the mapred-site.xml file should be set to:

A) The maximum number of Map tasks which can run on the cluster as a whole.
B) Half the number of the maximum number of Reduce tasks which can run on the cluster as a whole.
C) The same value on each slave node.
D) The maximum number of Map tasks can run simultaneously on an individual node.
E) Half the number of the maximum number of Reduce tasks which can run simultaneously on an individual node.

5. For a MapReduce job, on a cluster running MapReduce v1 (MRv1), what's the relationship between tasks and task templates?

A) There are always at least as many task attempts as there are tasks.
B) There are always exactly as many task attempts as there are tasks.
C) The developer sets the number of task attempts on job submission.
D) There are always at most as many tasks attempts as there are tasks.

Solutions: