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

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

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

2. In HDFS, you view a file with rw-r--r-- set as its permissions. What does this tell you about the file?

A) The file cannot be deleted by anyone
B) The file's contents can be modified by the owner, but no-one else
C) The file cannot be run as a MapReduce job
D) As a Filesystem in Userspace (FUSE), HDFS files are available to all user's on a cluster regardless of their underlying POSIX permissions.
E) The file cannot be deleted by anyone but the owner

3. It is recommended that you run the HDFS balancer periodically. Why? (Choose 3)

A) To ensure that there is capacity in HDTS for additional data.
B) To improve data locality for MapReduce tasks.
C) To help HDFS deliver consistent performance under heavy loads.
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.

4. Which MapReduce v2 (MR2/YARN) daemon is a per-machine slave responsible for launching application containers and monitoring application resources usage?

A) ApplicationMasterService
B) ApplicationMaster
C) NodeManager
D) ResourceManager
E) TaskTracker
F) JobTracker

5. What happens if a Mapper on one node goes into an infinite loop while running a MapReduce job?

A) After a period of time, the JobTracker will restart the TaskTracker on the node on which the map task is running
B) After a period of time, the TaskTracker will kill the Map Task.
C) The job will immediately fail.
D) The Mapper will run indefinitely; the TaskTracker must be restarted to kill it

Solutions: