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

1. Hadoop provider web interface can be used for all of the following EXCEPT: (choose 1)

A) Keeping track of tasks running on each individual slave node.
B) Keeping track of processor and memory utilization on each individual slave node.
C) Browsing files in HDFS.
D) Keeping track of jobs running on the cluster.
E) Keeping track of the number of files and directories stored in HDFS.

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

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

3. Your Hadoop cluster contains nodes in three racks. Choose which scenario results if you leave the dfs.hosts property in the NameNode's configuration file empty (blank)?

A) Presented with a blank dfs.hosts property, the NameNode will permit DataNodes specified in mapred.hosts to join the cluster.
B) The NameNode will update dfs.hosts property to include machines running the DataNode daemon on the next NameNode reboot or with a dfsadmin -refreshNodes.
C) No new can be added to the cluster until you specify them in the dfs.hosts file.
D) Any machine running the DataNode daemon can immediately join the cluster.

4. You are running a Hadoop cluster with all monitoring facilities properly configured. Which scenario will go undetected?

A) HDFS is almost full.
B) The NameNode goes down.
C) A DataNode is disconnected from the cluster.
D) Map or reduce tasks that are stuck in an infinite loop.
E) MapReduce jobs that are causing excessive memory swaps.

5. For a MapReduce job, what's the relationship between tasks and task attempts?

A) There are always exactly as many task attempts as there are tasks.
B) There are always at least as many task attempts as there are tasks.
C) There are always at most as many task attempts as there are tasks.

Solutions: