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

1. A client wants to read a file from HDFS. How does the data get from the DataNodes to the client?

A) The application reads the blocks directly from the DataNodes.
B) The NameNode reads the blocks from the DataNodes, and caches them. Then, the application reads the blocks from the NameNode.
C) The blocks are sent to a single DataNode, then the application reads the blocks from that Data Node.

2. Which scheduler would you deploy to ensure that your cluster allows short jobs to finish within a reasonable time without starving long-running jobs?

A) Completely Fair Scheduler (CFS)
B) Capacity Scheduler
C) Fair Scheduler
D) FIFO Scheduler

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

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

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

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

5. Assuming a large properly configured multi-rack Hadoop cluster, which scenario should not result in loss of HDFS data assuming the default replication factor settings?

A) Multiple racks simultaneously fail.
B) Seventy percent of DataNodes simultaneously fail.
C) All DataNodes simultaneously fail.
D) Ten percent of DataNodes simultaneously fail.
E) An entire rack fails.

Solutions: