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

1. You set up the Hadoop cluster using NameNode Federation. One NameNode manages the/users namespace and one NameNode manages the/data namespace. What happens when client tries to write a file to/reports/myreport.txt?

A) The client throws an exception.
B) The file successfully writes to /users/reports/myreports/myreport.txt.
C) The file successfully writes to /report/myreport.txt. The metadata for the file is managed by the first NameNode to which the client connects.
D) The file writes fails silently; no file is written, no error is reported.

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

3. Compare the hardware requirements of the NameNode with that of the DataNodes in a Hadoop cluster:

A) The NameNode and DataNodes should have the same hardware configuration.
B) The NameNode requires more memory but less disk capacity.
C) The NameNode requires more memory and requires greater disk capacity than the DataNodes.
D) The NameNode requires more memory and no disk drives.
E) The NameNode requires less memory and fewer number of disk drives than the DataNodes.

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

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

5. You configure Hadoop cluster with both MapReduce frameworks, MapReduce v1 (MRv1) and MapReduce v2 (MRv2/YARN). Which two MapReduce (computational) daemons do you need to configure to run on your master nodes?

A) ApplicationMaster
B) JournalNode
C) JobTracker
D) NodeManager
E) ResourceManager

Solutions: