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Cloudera CCA-470 Exam Syllabus Topics:

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

1. What determines the number of Reduces that run a given MapReduce job on a cluster running MapReduce v1 (MRv1)?

A) It is set by the Hadoop framework and is based on the number of InputSplits of the job.
B) It is set by the developer.
C) It is set and fixed by the cluster administrator in mapred-site.xml. The number set always run for any submitted job.
D) It is set by the JobTracker based on the amount of intermediate data.

2. Choose three reasons why should you run the HDFS balancer periodically?

A) To improve data locality for MapReduce tasks.
B) To help HDFS deliver consistent performance under heavy loads.
C) To ensure that there is capacity in HDFS tor additional data.
D) To ensure that all blocks in the cluster are 128MB in size.
E) To ensure that there is consistent disk utilization across the DataNodes.

3. What does CDH packaging do on install to facilitate Kerberos security setup?

A) Automatically configure permissions for log files at $MAPPED_LOG_DIR/userlogs
B) Creates directories for temp, hdfs, and mapreduce with correct permissions.
C) Creates a set of pre-configured Kerberos keytab files and their permissions.
D) Creates users for hdfs and mapreduce to facilitate role assignment.
E) Creates and configures you kdc with default cluster values.

4. 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.

5. The failure of which daemon makes HDFS unavailable on a cluster running MapReduce v1 (MRv1)?

A) Node Manager
B) Application Manager
C) Secondary NameNode
D) DataNode
E) NameNode
F) Resource Manager

Solutions: